1973 Bentley Corniche Automatic Transmission Parts

Engine:
6.8L V8

The 1973 Bentley Corniche has 116 automatic transmission parts with verified fitment on this page — 34 part types and 16 brands, covering the 6.8L V8 engine. Each part includes a manufacturer part number and application notes.

On the 1973 Bentley Corniche, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. 29 parts of the 116 listed are Extension Housing Seal (11 parts), Rebuild Kit (10 parts) and Filter (8 parts). The other 31 part types cover the remaining 87 parts.

Band

Brand Part Number Markets Notes Buy
ATP JX58
🇺🇸 US 🇨🇦 CA
Front
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ATP JX60
🇺🇸 US 🇨🇦 CA
Reverse
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PIONEER 767043
🇺🇸 US
Front
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PIONEER 767017
🇺🇸 US
Reverse
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This table covers the apply bands inside the automatic transmission.

Bushing

Brand Part Number Markets Notes Buy
PIONEER Popular 755043
🇺🇸 US
Trans. code THM400converter Housing
Fitment notes — PIONEER 755043
Trans. code THM400converter HousingFront PumpBabbit
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PIONEER Popular 755070
🇺🇸 US
RearTrans. code THM400
Fitment notes — PIONEER 755070
RearTrans. code THM400Case
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ATP JB53
🇺🇸 US
Trans. code THM400Output Flange or Output Shaft - Wide
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ATP CB4
🇺🇸 US
Trans. code THM400converter Housing - Front Pump - Babbit
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ATP JB50
🇺🇸 US
Trans. code THM400Position: Case - Rear
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PIONEER 755072
🇺🇸 US
Trans. code THM400Length: 1.00"
Fitment notes — PIONEER 755072
Trans. code THM400Length: 1.00"Outer Diameter: 1.995"Extension Housing
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This table covers the bushings in this assembly. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.

Bushing Kit

Brand Part Number Markets Notes Buy
ATP JBS1
🇺🇸 US
Trans. code THM400
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DURA-BOND TK54
🇺🇸 US
Trans. code THM400
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DURA-BOND TK54HP
🇺🇸 US
High Performance Kit
Fitment notes — DURA-BOND TK54HP
High Performance Kit
Trans. code THM400
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PIONEER 754013
🇺🇸 US
Trans. code THM400
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This table covers the Bushing kits.

Center Support Bushing

Brand Part Number Markets Notes Buy
DURA-BOND 02101
🇺🇸 US
Trans. code THM400Center Support
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This table covers the Center Support bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.

Clutch Pack Piston Dam / Seal

Brand Part Number Markets Notes Buy
ATP JO52
🇺🇸 US
Direct Clutch Piston Set
Fitment notes — ATP JO52
Direct Clutch Piston Set
Trans. code THM400Kit - Lip sealPosition: Forward & Direct Clutch - Inner/Center/Outer
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PIONEER 758002
🇺🇸 US
Kit
Fitment notes — PIONEER 758002
Kit
Trans. code THM400Lip sealforward & direct clutchinner/center/outer
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This table covers the seals at the Clutch Pack Piston Dam. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Dipstick / Fluid Filler Tube

Brand Part Number Markets Notes Buy
ATP PTS1021
🇺🇸 US 🇨🇦 CA
Dipstick Only
Fitment notes — ATP PTS1021
Dipstick Only
KitFiller Tube & Dipstick
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PIONEER 768023
🇺🇸 US 🇨🇦 CA
KitFiller Tube & Dipstick
Fitment notes — PIONEER 768023
KitFiller Tube & DipstickLength: 29"
Trans. code THM350
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This table covers the Dipstick / Fluid Filler tubes.

Dipstick / Fluid Filler Tube Seal

Brand Part Number Markets Notes Buy
ATP JO16
🇺🇸 US
Trans. code THM400Intake Filler Tube To Case
Fitment notes — ATP JO16
Trans. code THM400Intake Filler Tube To CaseElectrical Connector
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PIONEER 762008
🇺🇸 US
Trans. code THM400Intake Filler Tube To Case
Fitment notes — PIONEER 762008
Trans. code THM400Intake Filler Tube To CaseElectrical Connector
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This table covers the seals at the Dipstick / Fluid Filler Tube. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Extension Housing Bushing

Brand Part Number Markets Notes Buy
ATP JB54
🇺🇸 US
Trans. code THM400Outer Diameter: 2"
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PIONEER 755071
🇺🇸 US
Trans. code THM400Length: 1.50"
Fitment notes — PIONEER 755071
Trans. code THM400Length: 1.50"Outer Diameter: 2"
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This table covers the Extension Housing bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.

Extension Housing Gasket

Brand Part Number Markets Notes Buy
ATP JG54
🇺🇸 US 🇨🇦 CA
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ATP GG1080
🇺🇸 US 🇨🇦 CA
Position: Extension Housing to Transfer Case or adapter Housing
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PIONEER 749090
🇺🇸 US 🇨🇦 CA
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PIONEER 749289
🇺🇸 US 🇨🇦 CA
Extension Housing to Transfer Case or adapter Housing
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This table covers the gaskets that seal the Extension Housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.

Extension Housing Seal

Brand Part Number Markets Notes Buy
ATP Popular HO8
🇺🇸 US
Trans. code THM400with Long Extension
Fitment notes — ATP HO8
Trans. code THM400with Long ExtensionMore Than 133" WBwithout BootOuter Diameter: 2.5"
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NATIONAL Popular 9449
🇺🇸 US
3 speed trans.Trans. code THM400
Fitment notes — NATIONAL 9449
3 speed trans.Trans. code THM400General Motors trans.
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SCHAEFFLER Popular SS2960
🇺🇸 US
Type of construction: FmsaMetal, Spring, Auxiliary Lip
Fitment notes — SCHAEFFLER SS2960
Type of construction: FmsaMetal, Spring, Auxiliary Lip
3 speed trans.Trans. code THM400with 1.886 In Shaft
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ATP JO57
🇺🇸 US
Trans. code THM400without Boot
Fitment notes — ATP JO57
Trans. code THM400without BootOuter Diameter: 2.9375"
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ATP HO9
🇺🇸 US
Trans. code THM400without Boot
Fitment notes — ATP HO9
Trans. code THM400without Bootwith Flangewithout ExtensionOuter Diameter: 2.6875"Position: Output
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NATIONAL 5208
🇺🇸 US
Type: 74Includes Bushing
Fitment notes — NATIONAL 5208
Type: 74Includes Bushing
3 speed trans.Trans. code THM400General Motors trans.with Extension Housing Diameter 1.9945 IN
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PIONEER 759023
🇺🇸 US
Trans. code THM400without Boot
Fitment notes — PIONEER 759023
Trans. code THM400without BootOuter Diameter: 2.9375"
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PIONEER 759016
🇺🇸 US
Trans. code THM400without Boot
Fitment notes — PIONEER 759016
Trans. code THM400without Bootwith Flangewithout ExtensionOuter Diameter: 2.6875"Inner Diameter: 1.75"Output
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PIONEER 759020
🇺🇸 US
Trans. code THM400with Long Extension
Fitment notes — PIONEER 759020
Trans. code THM400with Long ExtensionMore Than 133" WBwithout BootOuter Diameter: 2.5"
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WJB / INMOTION PARTS WS9449
🇺🇸 US
Width (In): 0.58199999999999996 In
Fitment notes — WJB / INMOTION PARTS WS9449
Width (In): 0.58199999999999996 In
3 speed trans.General Motors trans.THM400 Transmission
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WJB / INMOTION PARTS WS5208
🇺🇸 US
Material: NitrileWidth (In): 1 in
Fitment notes — WJB / INMOTION PARTS WS5208
Material: NitrileWidth (In): 1 in
3 speed trans.General Motors trans.with Extension Housing Diameter 1.9945 INTHM400 Transmission
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This table covers the seals at the Extension Housing. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Filter

Economy

Brand Part Number Markets Notes Buy
ATP Popular TF29
🇺🇸 US
OE Replacement
Fitment notes — ATP TF29
OE Replacement
Trans. code THM400
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Standard Replacement

Brand Part Number Markets Notes Buy
ATP Popular B29
🇺🇸 US
Includes: (1) Gasket, (1) ScreenPremium Replacement
Fitment notes — ATP B29
Includes: (1) Gasket, (1) ScreenPremium ReplacementDacron media filterWith 3rd Hand Gasket
25"
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ATP JX150
🇺🇸 US 🇨🇦 CA
In-Line Filter KitIncludes: (2) Hoses, (4) Clamps
Fitment notes — ATP JX150
In-Line Filter KitIncludes: (2) Hoses, (4) ClampsPlastic Body5/16" Double Barbs5/16" Double Barbs
with 5/16" Double BarbsExternal, Add-On In-Line Filter
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ATP JX151
🇺🇸 US 🇨🇦 CA
In-Line Filter KitInline Cooler Filter
Fitment notes — ATP JX151
In-Line Filter KitInline Cooler FilterSmall Footprint Aluminum Body5/16" Double Barbs
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ATP IL150
🇺🇸 US 🇨🇦 CA
In-Line Filter KitInline Cooler Filter
Fitment notes — ATP IL150
In-Line Filter KitInline Cooler FilterPlastic Body or Small Footprint Aluminum Body5/16" Double Barbs
In-line Filter
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PIONEER 745042
🇺🇸 US 🇨🇦 CA
Media: Brass Media Filter
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PIONEER 745119
🇺🇸 US 🇨🇦 CA
Inline Cooler FilterIn-Line Filter Kit
Fitment notes — PIONEER 745119
Inline Cooler FilterIn-Line Filter KitInline Filter
In-line Filter
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Brand Part Number Markets Notes Buy
ATP JX59
🇺🇸 US
Does Not Include Gasket
Fitment notes — ATP JX59
Does Not Include Gasket
Trans. code THM400
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This table covers the replacement filters for this application — the table heading and notes say which circuit. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for.

Fluid Pan Gasket

Brand Part Number Markets Notes Buy
FEL-PRO Popular TOS18621
🇺🇸 US
3 speed trans.Trans. code THM400
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MAHLE / CLEVITE Popular W39341TC
🇺🇸 US
Cork with Metal CarrierAutomatic Transmission Oil Pan Gasket
Fitment notes — MAHLE / CLEVITE W39341TC
Cork with Metal CarrierAutomatic Transmission Oil Pan Gasket
Trans. code THM400with 13 Bolt Holes
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ATP JG50
🇺🇸 US
Trans. code THM400Fiber
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MAHLE / CLEVITE W39341
🇺🇸 US
Cork-RubberAutomatic Transmission Oil Pan Gasket
Fitment notes — MAHLE / CLEVITE W39341
Cork-RubberAutomatic Transmission Oil Pan Gasket
Trans. code THM400with 13 Bolt Holes
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PIONEER 749020
🇺🇸 US
Fiber
Fitment notes — PIONEER 749020
Fiber
Trans. code THM400
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VICTOR REINZ 711493800
🇺🇸 US 🇨🇦 CA
3 speed trans.Trans. code THM400
Fitment notes — VICTOR REINZ 711493800
3 speed trans.Trans. code THM40013 Bolt
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This table covers the gaskets that seal the Fluid Pan. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.

Fluid Pump Bushing

Brand Part Number Markets Notes Buy
DURA-BOND 44034
🇺🇸 US
Trans. code THM400Pump Body
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DURA-BOND 44034TG
🇺🇸 US
Dry Film Lubricated
Fitment notes — DURA-BOND 44034TG
Dry Film Lubricated
Trans. code THM400Pump BodyDry Film Lubricant
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This table covers the Fluid Pump bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.

Fluid Pump Gasket

Brand Part Number Markets Notes Buy
ATP JG53
🇺🇸 US
Trans. code THM400Position: Front Pump to Case
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PIONEER 749075
🇺🇸 US
Trans. code THM400Front Pump to Case
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This table covers the gaskets that seal the Fluid Pump. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.

Fluid Pump O-Ring

Brand Part Number Markets Notes Buy
ATP SO21
🇺🇸 US
Trans. code THM400High Clutch Piston Set
Fitment notes — ATP SO21
Trans. code THM400High Clutch Piston SetLCS - Extension Housing To Case
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PIONEER 762007
🇺🇸 US
Trans. code THM400High Clutch Piston Set
Fitment notes — PIONEER 762007
Trans. code THM400High Clutch Piston SetLCSExtension Housing To Case
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PIONEER 762037
🇺🇸 US
Trans. code THM400Front Pump
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This table covers the Fluid Pump O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove.

Fluid Pump Repair Sleeve

Brand Part Number Markets Notes Buy
BCA NS88187
🇺🇸 US
Front3 speed trans.
Fitment notes — BCA NS88187
Front3 speed trans.with THM400 Transmission CodeGeneral Motors Transmission
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NATIONAL 99187
🇺🇸 US
3 speed trans.Trans. code THM400
Fitment notes — NATIONAL 99187
3 speed trans.Trans. code THM400General Motors trans.
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WJB / INMOTION PARTS WS99187
🇺🇸 US
Front3 speed trans.
Fitment notes — WJB / INMOTION PARTS WS99187
Front3 speed trans.General Motors trans.THM400 Transmission
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This table covers the precision wear sleeves used to restore a transmission pump seal surface.

Fluid Pump Seal

Brand Part Number Markets Notes Buy
NATIONAL Popular 6712NA
🇺🇸 US
Front3 speed trans.
Fitment notes — NATIONAL 6712NA
Front3 speed trans.Trans. code THM400General Motors trans.
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ATP CO4
🇺🇸 US
Trans. code THM400Outer Diameter: 3"
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BCA NS6712NA
🇺🇸 US
Front3 speed trans.
Fitment notes — BCA NS6712NA
Front3 speed trans.Trans. code THM400
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PIONEER 759021
🇺🇸 US
Trans. code THM400Outer Diameter: 3"
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WJB / INMOTION PARTS WS6712NA
🇺🇸 US
Front3 speed trans.
Fitment notes — WJB / INMOTION PARTS WS6712NA
Front3 speed trans.General Motors trans.THM400 Transmission
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This table covers the seals at the Fluid Pump. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Gasket Kit

Brand Part Number Markets Notes Buy
PIONEER 748027
🇺🇸 US 🇨🇦 CA
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PIONEER 748028
🇺🇸 US 🇨🇦 CA
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This table covers the gasket kits for this job. Typical signs include the leaks that sent this assembly to the bench. Confirm the kit matches the opening you are sealing; unused leftover pieces often belong to another configuration.

Governor / Modulator

Brand Part Number Markets Notes Buy
ATP Popular JX76
🇺🇸 US
Trans. code THM400Adjustable 12-19.5 - EDA 2.48 - Black/Red - with EGR
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PIONEER 747024
🇺🇸 US
Trans. code THM400Adjustable 12-19.5
Fitment notes — PIONEER 747024
Trans. code THM400Adjustable 12-19.5EDA 2.48Black/Redwith EGR
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ROSTRA 510017
🇺🇸 US
Dual Red Stripe Modulator
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ROSTRA 510020
🇺🇸 US
ModulatorBlack & Red Stripe
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ROSTRA 510062
🇺🇸 US
Single Red StripeAdjustable Modulator
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This table covers the governors and modulators that control transmission shift pressure.

Kickdown Solenoid

Brand Part Number Markets Notes Buy
ROSTRA 520604
🇺🇸 US
Trans. code THM400
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This table covers the Kickdown solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid.

Manual Shaft Seal

Brand Part Number Markets Notes Buy
NATIONAL 8792S
🇺🇸 US
3 speed trans.Trans. code THM400
Fitment notes — NATIONAL 8792S
3 speed trans.Trans. code THM400General Motors trans.
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WJB / INMOTION PARTS WS8792S
🇺🇸 US
3 speed trans.General Motors trans.
Fitment notes — WJB / INMOTION PARTS WS8792S
3 speed trans.General Motors trans.THM400 Transmission
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This table covers the seals at the Manual Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Output Shaft Bushing

Brand Part Number Markets Notes Buy
DURA-BOND 8624988
🇺🇸 US
Trans. code THM400Output Shaft (Narrow)
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This table covers the Output Shaft bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.

Output Shaft Seal

Brand Part Number Markets Notes Buy
BCA NS9449
🇺🇸 US
External Markings: 1.890 X 2.700 X 0.582
Fitment notes — BCA NS9449
External Markings: 1.890 X 2.700 X 0.582
3 speed trans.Trans. code THM400
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SCHAEFFLER SS2962
🇺🇸 US
Seal KitType of Construction: FM
Fitment notes — SCHAEFFLER SS2962
Seal KitType of Construction: FMMetal
3 speed trans.Trans. code THM400with 1.886 In Shaft
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This table covers the seals at the Output Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Rebuild Kit

Banner Kit (Overhaul Kit + Friction Clutch Plates)

Brand Part Number Markets Notes Buy
ATP JM10
🇺🇸 US
Banner KitIncludes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings (full Banner Kit), friction clutch plates
Fitment notes — ATP JM10
Banner KitIncludes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings (full Banner Kit), friction clutch plates
Trans. code THM400
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PIONEER 751035
🇺🇸 US
Banner KitIncludes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings (short), friction clutch plates
Fitment notes — PIONEER 751035
Banner KitIncludes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings (short), friction clutch platesOverhaul Kit
Trans. code THM400
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Deluxe Kit (Master Kit + Filter, Band & Common Bushings)

Brand Part Number Markets Notes Buy
PIONEER 753024
🇺🇸 US
Includes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings, Friction Clutch plates, Steel Clutch Plates, Filter, Front & Rear Bushings, 2 Bands,and Modulator.PLUS Kit
Fitment notes — PIONEER 753024
Includes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings, Friction Clutch plates, Steel Clutch Plates, Filter, Front & Rear Bushings, 2 Bands,and Modulator.PLUS Kit
Trans. code THM400
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Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)

Brand Part Number Markets Notes Buy
ATP Popular JMS9
🇺🇸 US
Includes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings, Friction Clutch plates, Steel Clutch Plates, Filter, Front & Rear Bushings, 2 Bands,and Modulator.PLUS Kit
Fitment notes — ATP JMS9
Includes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings, Friction Clutch plates, Steel Clutch Plates, Filter, Front & Rear Bushings, 2 Bands,and Modulator.PLUS KitContains Friction and Steel Clutch Plates, Gaskets, Seals, O'Rings, Sealing Rings, PLUS Oil Filter, Vacuum Modulator, Front Pump Bushing, and Extension Housing Bushing
Trans. code THM400
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ATP JM9
🇺🇸 US
Standard Kit
Fitment notes — ATP JM9
Standard Kit
Trans. code THM400
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PIONEER 752002
🇺🇸 US
Standard Kit
Fitment notes — PIONEER 752002
Standard Kit
Trans. code THM400
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Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)

Brand Part Number Markets Notes Buy
ATP Popular JGS52
🇺🇸 US
Gaskets, Seals, O-Rings, and Sealing Rings
Fitment notes — ATP JGS52
Gaskets, Seals, O-Rings, and Sealing Rings
Trans. code THM400
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ATP JGS53
🇺🇸 US
Does Not Include Sealing Rings or Extension Housing Seal
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PIONEER 750038
🇺🇸 US
Overhaul KitIncludes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings (full Kit)
Fitment notes — PIONEER 750038
Overhaul KitIncludes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings (full Kit)
Trans. code THM400
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TRANSTEC 81000348
🇺🇸 US 🇨🇦 CA
without PistonsDuraprene Pan Gasket
Fitment notes — TRANSTEC 81000348
without PistonsDuraprene Pan Gasket
BaseTH400, 375, 475 (3L80)3 Speed
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This table covers the rebuild kits for this assembly.

Shift Improvement Kit

Daily Driver

Brand Part Number Markets Notes Buy
TRANSGO Popular SK400
🇺🇸 US
Shift KitFor 400 Transmissions
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PIONEER 765010
🇺🇸 US
Trans. code THM400Improver Kit
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Heavy Duty

Brand Part Number Markets Notes Buy
ATP JK1
🇺🇸 US
Contains Heavy Duty Upgraded (from OE) SpringsMay Contain Spacer Plates, Spool Valves & Gaskets Depending on Revision of OE
Fitment notes — ATP JK1
Contains Heavy Duty Upgraded (from OE) SpringsMay Contain Spacer Plates, Spool Valves & Gaskets Depending on Revision of OE
Trans. code THM400Improver Kit
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High Performance

Brand Part Number Markets Notes Buy
TRANSGO Popular 40012
🇺🇸 US
Reprogramming KitWith Gear Command
Fitment notes — TRANSGO 40012
Reprogramming KitWith Gear CommandFor 400 Transmissions
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TRANSGO 4003
🇺🇸 US
Reprogramming KitWith Manual Shift Control
Fitment notes — TRANSGO 4003
Reprogramming KitWith Manual Shift ControlFor 400 Transmissions
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TRANSGO 400PRO
🇺🇸 US
Reprogramming KitWith Gear Command
Fitment notes — TRANSGO 400PRO
Reprogramming KitWith Gear CommandFor 400 TransmissionsIncludes 2-3 Aluminum Accumulator Piston
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This table covers the Shift Improvement kits.

Shift Shaft Seal

Brand Part Number Markets Notes Buy
ACDELCO 8792S
🇺🇸 US 🇨🇦 CA
Gold
Fitment notes — ACDELCO 8792S
Gold
3 speed trans.Trans. code THM400
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ATP SO19
🇺🇸 US
Trans. code THM400
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PIONEER 759022
🇺🇸 US
Trans. code THM400
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SCHAEFFLER SS2114
🇺🇸 US
3 speed trans.Trans. code THM400
Fitment notes — SCHAEFFLER SS2114
3 speed trans.Trans. code THM4004.75 mm WidthNitrile12.7 mm Shaft Diameter
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This table covers the seals at the Shift Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Shift Solenoid

Brand Part Number Markets Notes Buy
PIONEER 771002
🇺🇸 US 🇨🇦 CA
detentshort wire
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This table covers the Shift solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid.

Sprag

Brand Part Number Markets Notes Buy
ATP JX53
🇺🇸 US 🇨🇦 CA
Intermediate Clutch
Fitment notes — ATP JX53
Intermediate Clutch
Intermediate Clutchwith Sprag Type Clutch Only
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PIONEER 764029
🇺🇸 US 🇨🇦 CA
Intermediate clutch sprag
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This table covers the one-way sprag clutches in the transmission.

Stator Support Shaft Bushing

Brand Part Number Markets Notes Buy
DURA-BOND 8623944
🇺🇸 US
Trans. code THM400Stator Support (Front & Rear), Sun Gear Shaft (Front & Rear)
Fitment notes — DURA-BOND 8623944
Trans. code THM400Stator Support (Front & Rear), Sun Gear Shaft (Front & Rear)Bronze
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This table covers the Stator Support Shaft bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.

Sun Gear Bushing

Brand Part Number Markets Notes Buy
PIONEER 755066
🇺🇸 US
Trans. code THM400Driven Sprocket Support
Fitment notes — PIONEER 755066
Trans. code THM400Driven Sprocket SupportStator and Sun Gear ShaftFront & Rear
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This table covers the Sun Gear bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.

Torque Converter

Brand Part Number Markets Notes Buy
TC REMANUFACTURING B3
🇺🇸 US
Trans. code THM400Standard Stator, 3 Mounting Pads
Fitment notes — TC REMANUFACTURING B3
Trans. code THM400Standard Stator, 3 Mounting PadsMedium Stall
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This table covers the Torque converters. Typical signs include a sulfur smell, rattling substrate, or an efficiency code. Confirm CARB vs Federal certification in the notes before ordering.

Torque Converter Repair Sleeve

Brand Part Number Markets Notes Buy
SCHAEFFLER SR3506
🇺🇸 US
3 speed trans.Trans. code THM400
Fitment notes — SCHAEFFLER SR3506
3 speed trans.Trans. code THM4000.531 In Width1.875 In Inside Diameter
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This table covers the wear sleeves used to restore a Torque Converter seal surface.

Torque Converter Shaft Seal

Brand Part Number Markets Notes Buy
SCHAEFFLER SS2912
🇺🇸 US
3 speed trans.Trans. code THM400
Fitment notes — SCHAEFFLER SS2912
3 speed trans.Trans. code THM4002.76" O.D. X 0.43" Width
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This table covers the seals at the Torque Converter Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Transmission Fluid Additive

Brand Part Number Markets Notes Buy
LUBEGARD Popular 19610
🇺🇸 US
Instant Shudder Fixx2 oz
Fitment notes — LUBEGARD 19610
Instant Shudder Fixx2 oz
Automatic trans.3 speed trans.Trans. code THM400
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LUBEGARD Popular 60902
🇺🇸 US
Automatic Transmission Fluid Protectant10 oz
Fitment notes — LUBEGARD 60902
Automatic Transmission Fluid Protectant10 oz
Automatic trans.
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ATP AT202
🇺🇸 US 🇨🇦 CA
Automatic Transmission Fluid Synthetic Protectant
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LUBEGARD 19689
🇺🇸 US
Instant Shudder Fixx2 oz
Fitment notes — LUBEGARD 19689
Instant Shudder Fixx2 oz
Automatic trans.3 speed trans.Trans. code THM400
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LUBEGARD 63010
🇺🇸 US
Platinum Universal ATF Protectant10 oz
Fitment notes — LUBEGARD 63010
Platinum Universal ATF Protectant10 oz
Automatic trans.Trans. code THM400Use with OEM Recommended ATF or as OEM fluid Alternative.
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LUBEGARD 63016
🇺🇸 US
Platinum Universal ATF Protectant15 oz
Fitment notes — LUBEGARD 63016
Platinum Universal ATF Protectant15 oz
Automatic trans.Trans. code THM400Use with OEM Recommended ATF or as OEM fluid Alternative.
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LUBEGARD 98010
🇺🇸 US
Use with Original Equipment Manufacturer Recommended Automatic Transmission Fluid 2 Pack 10 Ounces Each or 32 oz. BottleHigh-Performance Original Equipment Manufacturer Fluid Alternative/Protectant
Fitment notes — LUBEGARD 98010
Use with Original Equipment Manufacturer Recommended Automatic Transmission Fluid 2 Pack 10 Ounces Each or 32 oz. BottleHigh-Performance Original Equipment Manufacturer Fluid Alternative/ProtectantTransmission Flush
Automatic trans.Trans. code THM400
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LUBEGARD 63032
🇺🇸 US
Platinum Universal ATF Protectant32 oz
Fitment notes — LUBEGARD 63032
Platinum Universal ATF Protectant32 oz
Automatic trans.Trans. code THM400Use with OEM Recommended ATF or as OEM fluid Alternative.
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This table covers the conditioners and additives used with this transmission fluid.

Buying Automatic Transmission Parts for a 1973 Bentley Corniche

On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.

  • Confirm you have the 6.8L V8 engine — every part on this page is matched to it.
  • Read the notes on each row for position, trim and spec qualifiers before you order.
  • Where labor overlaps, replace the filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
  • Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: Extension Housing Seal and Rebuild Kit .

Frequently Asked Questions

How many automatic transmission parts fit the 1973 Bentley Corniche?

Our catalog currently lists 116 automatic transmission parts for the 1973 Bentley Corniche across 34 subcategories and 16 brands, covering the 6.8L V8 engine. Each part is matched to the engine(s) it fits.

What are the signs of automatic transmission problems on a 1973 Bentley Corniche?

Common symptoms include delayed or harsh engagement, slipping under load, fluid that smells burnt, or shuddering at light throttle around 40 mph. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

What should I replace at the same time?

Where labor overlaps, replace the filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.

What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1973 Bentley Corniche was originally sold in the US, the safest choice is a part marked for the US market.

How do I make sure a part fits my 1973 Bentley Corniche?

Every part on this page is matched to the 6.8L V8 engine. Then use exactly the fluid specification in the notes — automatic transmissions are the least forgiving component on the vehicle about fluid choice. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 1973 Bentley Corniche

Automatic Transmission Parts for Other Bentley Corniche Years

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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.