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.
The 1973 Bentley Corniche came with a single engine, the 6.8L V8, and every part is verified against it.
16 brands supply automatic transmission parts for the 1973 Bentley Corniche, led by ATP (35 parts), PIONEER (34 parts) and DURA-BOND (7 parts), plus 13 more brands. Quality grades include Standard Replacement, Overhaul Kit and High Performance.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1973 Bentley Corniche. 17 parts have it, including PIONEER 755043 (Bushing) and ATP HO8 (Extension Housing Seal). Each part number opens a page with every vehicle that part fits.
Band
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JX58 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
| ATP | JX60 | 🇺🇸 US 🇨🇦 CA | Reverse | View on Amazon |
| PIONEER | 767043 | 🇺🇸 US | Front | View on Amazon |
| PIONEER | 767017 | 🇺🇸 US | Reverse | View on Amazon |
This table covers the apply bands inside the automatic transmission.
4 Band parts for the 1973 Bentley Corniche come from 2 brands — ATP and PIONEER.
Part numbers include ATP JX58, ATP JX60 and PIONEER 767043, among others listed above.
Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PIONEER Popular | 755043 | 🇺🇸 US | Trans. code THM400converter Housing | View on Amazon |
| PIONEER Popular | 755070 | 🇺🇸 US | RearTrans. code THM400 | View on Amazon |
| ATP | JB53 | 🇺🇸 US | Trans. code THM400Output Flange or Output Shaft - Wide | View on Amazon |
| ATP | CB4 | 🇺🇸 US | Trans. code THM400converter Housing - Front Pump - Babbit | View on Amazon |
| ATP | JB50 | 🇺🇸 US | Trans. code THM400Position: Case - Rear | View on Amazon |
| PIONEER | 755072 | 🇺🇸 US | Trans. code THM400Length: 1.00" | View on Amazon |
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.
6 Bushing parts are listed for the 1973 Bentley Corniche, from PIONEER and ATP. PIONEER 755043 carries the "Popular" badge.
Listed part numbers: PIONEER 755043, PIONEER 755070 and ATP JB53, plus the other parts above.
Bushing Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JBS1 | 🇺🇸 US | Trans. code THM400 | View on Amazon |
| DURA-BOND | TK54 | 🇺🇸 US | Trans. code THM400 | View on Amazon |
| DURA-BOND | TK54HP | 🇺🇸 US | High Performance Kit | View on Amazon |
| PIONEER | 754013 | 🇺🇸 US | Trans. code THM400 | View on Amazon |
This table covers the Bushing kits.
4 Bushing Kit parts are listed for the 1973 Bentley Corniche, from DURA-BOND, ATP and PIONEER.
Listed part numbers: ATP JBS1, DURA-BOND TK54 and DURA-BOND TK54HP, plus the other parts above.
Center Support Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | 02101 | 🇺🇸 US | Trans. code THM400Center Support | View on Amazon |
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.
One part is listed for the 1973 Bentley Corniche — DURA-BOND 02101.
Clutch Pack Piston Dam / Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JO52 | 🇺🇸 US | Direct Clutch Piston Set | View on Amazon |
| PIONEER | 758002 | 🇺🇸 US | Kit | View on Amazon |
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.
2 Clutch Pack Piston Dam / Seal parts for the 1973 Bentley Corniche come from 2 brands — ATP and PIONEER.
Listed part numbers: ATP JO52 and PIONEER 758002.
Dipstick / Fluid Filler Tube
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | PTS1021 | 🇺🇸 US 🇨🇦 CA | Dipstick Only | View on Amazon |
| PIONEER | 768023 | 🇺🇸 US 🇨🇦 CA | KitFiller Tube & Dipstick | View on Amazon |
This table covers the Dipstick / Fluid Filler tubes.
2 Dipstick / Fluid Filler Tube parts are listed for the 1973 Bentley Corniche, from ATP and PIONEER.
Listed part numbers: ATP PTS1021 and PIONEER 768023.
Dipstick / Fluid Filler Tube Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JO16 | 🇺🇸 US | Trans. code THM400Intake Filler Tube To Case | View on Amazon |
| PIONEER | 762008 | 🇺🇸 US | Trans. code THM400Intake Filler Tube To Case | View on Amazon |
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.
2 Dipstick / Fluid Filler Tube Seal parts for the 1973 Bentley Corniche come from 2 brands — ATP and PIONEER.
Listed part numbers: ATP JO16 and PIONEER 762008.
Extension Housing Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JB54 | 🇺🇸 US | Trans. code THM400Outer Diameter: 2" | View on Amazon |
| PIONEER | 755071 | 🇺🇸 US | Trans. code THM400Length: 1.50" | View on Amazon |
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.
2 Extension Housing Bushing parts are listed for the 1973 Bentley Corniche, from ATP and PIONEER.
Listed part numbers: ATP JB54 and PIONEER 755071.
Extension Housing Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JG54 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| ATP | GG1080 | 🇺🇸 US 🇨🇦 CA | Position: Extension Housing to Transfer Case or adapter Housing | View on Amazon |
| PIONEER | 749090 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| PIONEER | 749289 | 🇺🇸 US 🇨🇦 CA | Extension Housing to Transfer Case or adapter Housing | View on Amazon |
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.
4 Extension Housing Gasket parts for the 1973 Bentley Corniche come from 2 brands — ATP and PIONEER.
Part numbers include ATP JG54, ATP GG1080 and PIONEER 749090, among others listed above.
Extension Housing Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Popular | HO8 | 🇺🇸 US | Trans. code THM400with Long Extension | View on Amazon |
| NATIONAL Popular | 9449 | 🇺🇸 US | 3 speed trans.Trans. code THM400 | View on Amazon |
| SCHAEFFLER Popular | SS2960 | 🇺🇸 US | Type of construction: FmsaMetal, Spring, Auxiliary Lip | View on Amazon |
| ATP | JO57 | 🇺🇸 US | Trans. code THM400without Boot | View on Amazon |
| ATP | HO9 | 🇺🇸 US | Trans. code THM400without Boot | View on Amazon |
| NATIONAL | 5208 | 🇺🇸 US | Type: 74Includes Bushing | View on Amazon |
| PIONEER | 759023 | 🇺🇸 US | Trans. code THM400without Boot | View on Amazon |
| PIONEER | 759016 | 🇺🇸 US | Trans. code THM400without Boot | View on Amazon |
| PIONEER | 759020 | 🇺🇸 US | Trans. code THM400with Long Extension | View on Amazon |
| WJB / INMOTION PARTS | WS9449 | 🇺🇸 US | Width (In): 0.58199999999999996 In | View on Amazon |
| WJB / INMOTION PARTS | WS5208 | 🇺🇸 US | Material: NitrileWidth (In): 1 in | View on Amazon |
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.
11 Extension Housing Seal parts for the 1973 Bentley Corniche come from 5 brands — ATP, PIONEER, NATIONAL and 2 other brands. The "Popular" part is ATP HO8.
Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Popular | TF29 | 🇺🇸 US | OE Replacement | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Popular | B29 | 🇺🇸 US | Includes: (1) Gasket, (1) ScreenPremium Replacement | View on Amazon |
| ATP | JX150 | 🇺🇸 US 🇨🇦 CA | In-Line Filter KitIncludes: (2) Hoses, (4) Clamps | View on Amazon |
| ATP | JX151 | 🇺🇸 US 🇨🇦 CA | In-Line Filter KitInline Cooler Filter | View on Amazon |
| ATP | IL150 | 🇺🇸 US 🇨🇦 CA | In-Line Filter KitInline Cooler Filter | View on Amazon |
| PIONEER | 745042 | 🇺🇸 US 🇨🇦 CA | Media: Brass Media Filter | View on Amazon |
| PIONEER | 745119 | 🇺🇸 US 🇨🇦 CA | Inline Cooler FilterIn-Line Filter Kit | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JX59 | 🇺🇸 US | Does Not Include Gasket | View on Amazon |
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.
8 Filter parts are listed for the 1973 Bentley Corniche, from ATP and PIONEER. ATP TF29 carries the "Popular" badge.
In the Economy grade, ATP supplies 1 part: the catalog's value-priced group. A representative part number is ATP TF29.
The Standard Replacement section lists 6 options from ATP and PIONEER — built to original-equipment specification. ATP B29 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Part numbers include ATP TF29, ATP B29 and ATP JX150, among others listed above.
Fluid Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | TOS18621 | 🇺🇸 US | 3 speed trans.Trans. code THM400 | View on Amazon |
| MAHLE / CLEVITE Popular | W39341TC | 🇺🇸 US | Cork with Metal CarrierAutomatic Transmission Oil Pan Gasket | View on Amazon |
| ATP | JG50 | 🇺🇸 US | Trans. code THM400Fiber | View on Amazon |
| MAHLE / CLEVITE | W39341 | 🇺🇸 US | Cork-RubberAutomatic Transmission Oil Pan Gasket | View on Amazon |
| PIONEER | 749020 | 🇺🇸 US | Fiber | View on Amazon |
| VICTOR REINZ | 711493800 | 🇺🇸 US 🇨🇦 CA | 3 speed trans.Trans. code THM400 | View on Amazon |
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.
6 Fluid Pan Gasket parts are listed for the 1973 Bentley Corniche, from MAHLE / CLEVITE, FEL-PRO, ATP and 2 other brands. FEL-PRO TOS18621 carries the "Popular" badge.
Listed part numbers: FEL-PRO TOS18621, MAHLE / CLEVITE W39341TC and ATP JG50, plus the other parts above.
Fluid Pump Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | 44034 | 🇺🇸 US | Trans. code THM400Pump Body | View on Amazon |
| DURA-BOND | 44034TG | 🇺🇸 US | Dry Film Lubricated | View on Amazon |
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.
DURA-BOND supplies both parts for the 1973 Bentley Corniche.
This group includes DURA-BOND 44034 and DURA-BOND 44034TG.
Fluid Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JG53 | 🇺🇸 US | Trans. code THM400Position: Front Pump to Case | View on Amazon |
| PIONEER | 749075 | 🇺🇸 US | Trans. code THM400Front Pump to Case | View on Amazon |
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.
2 Fluid Pump Gasket parts for the 1973 Bentley Corniche come from 2 brands — ATP and PIONEER.
This group includes ATP JG53 and PIONEER 749075.
Fluid Pump O-Ring
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | SO21 | 🇺🇸 US | Trans. code THM400High Clutch Piston Set | View on Amazon |
| PIONEER | 762007 | 🇺🇸 US | Trans. code THM400High Clutch Piston Set | View on Amazon |
| PIONEER | 762037 | 🇺🇸 US | Trans. code THM400Front Pump | View on Amazon |
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.
3 Fluid Pump O-Ring parts are listed for the 1973 Bentley Corniche, from PIONEER and ATP.
Listed part numbers: ATP SO21, PIONEER 762007 and PIONEER 762037.
Fluid Pump Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NS88187 | 🇺🇸 US | Front3 speed trans. | View on Amazon |
| NATIONAL | 99187 | 🇺🇸 US | 3 speed trans.Trans. code THM400 | View on Amazon |
| WJB / INMOTION PARTS | WS99187 | 🇺🇸 US | Front3 speed trans. | View on Amazon |
This table covers the precision wear sleeves used to restore a transmission pump seal surface.
3 Fluid Pump Repair Sleeve parts for the 1973 Bentley Corniche come from 3 brands — BCA, NATIONAL and WJB / INMOTION PARTS.
Listed part numbers: BCA NS88187, NATIONAL 99187 and WJB / INMOTION PARTS WS99187.
Fluid Pump Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Popular | 6712NA | 🇺🇸 US | Front3 speed trans. | View on Amazon |
| ATP | CO4 | 🇺🇸 US | Trans. code THM400Outer Diameter: 3" | View on Amazon |
| BCA | NS6712NA | 🇺🇸 US | Front3 speed trans. | View on Amazon |
| PIONEER | 759021 | 🇺🇸 US | Trans. code THM400Outer Diameter: 3" | View on Amazon |
| WJB / INMOTION PARTS | WS6712NA | 🇺🇸 US | Front3 speed trans. | View on Amazon |
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.
5 Fluid Pump Seal parts for the 1973 Bentley Corniche come from 5 brands — NATIONAL, ATP, BCA and 2 other brands. The "Popular" part is NATIONAL 6712NA.
Listed part numbers: NATIONAL 6712NA, ATP CO4 and BCA NS6712NA, plus the other parts above.
Gasket Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PIONEER | 748027 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| PIONEER | 748028 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
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.
2 Gasket Kit parts for the 1973 Bentley Corniche come from PIONEER.
This group includes PIONEER 748027 and PIONEER 748028.
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 | View on Amazon |
| PIONEER | 747024 | 🇺🇸 US | Trans. code THM400Adjustable 12-19.5 | View on Amazon |
| ROSTRA | 510017 | 🇺🇸 US | Dual Red Stripe Modulator | View on Amazon |
| ROSTRA | 510020 | 🇺🇸 US | ModulatorBlack & Red Stripe | View on Amazon |
| ROSTRA | 510062 | 🇺🇸 US | Single Red StripeAdjustable Modulator | View on Amazon |
This table covers the governors and modulators that control transmission shift pressure.
5 Governor / Modulator parts are listed for the 1973 Bentley Corniche, from ROSTRA, ATP and PIONEER. ATP JX76 carries the "Popular" badge.
Part numbers include ATP JX76, PIONEER 747024 and ROSTRA 510017, among others listed above.
Kickdown Solenoid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 520604 | 🇺🇸 US | Trans. code THM400 | View on Amazon |
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.
This group shows a single part: ROSTRA 520604.
Manual Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL | 8792S | 🇺🇸 US | 3 speed trans.Trans. code THM400 | View on Amazon |
| WJB / INMOTION PARTS | WS8792S | 🇺🇸 US | 3 speed trans.General Motors trans. | View on Amazon |
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.
2 Manual Shaft Seal parts for the 1973 Bentley Corniche come from 2 brands — NATIONAL and WJB / INMOTION PARTS.
This group includes NATIONAL 8792S and WJB / INMOTION PARTS WS8792S.
Output Shaft Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | 8624988 | 🇺🇸 US | Trans. code THM400Output Shaft (Narrow) | View on Amazon |
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.
This group shows a single part: DURA-BOND 8624988.
Output Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NS9449 | 🇺🇸 US | External Markings: 1.890 X 2.700 X 0.582 | View on Amazon |
| SCHAEFFLER | SS2962 | 🇺🇸 US | Seal KitType of Construction: FM | View on Amazon |
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.
2 Output Shaft Seal parts are listed for the 1973 Bentley Corniche, from BCA and SCHAEFFLER.
Part numbers include BCA NS9449 and SCHAEFFLER SS2962.
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 | View on Amazon |
| 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 | View on Amazon |
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 | View on Amazon |
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 | View on Amazon |
| ATP | JM9 | 🇺🇸 US | Standard Kit | View on Amazon |
| PIONEER | 752002 | 🇺🇸 US | Standard Kit | View on Amazon |
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 | View on Amazon |
| ATP | JGS53 | 🇺🇸 US | Does Not Include Sealing Rings or Extension Housing Seal | View on Amazon |
| PIONEER | 750038 | 🇺🇸 US | Overhaul KitIncludes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings (full Kit) | View on Amazon |
| TRANSTEC | 81000348 | 🇺🇸 US 🇨🇦 CA | without PistonsDuraprene Pan Gasket | View on Amazon |
This table covers the rebuild kits for this assembly.
10 Rebuild Kit parts for the 1973 Bentley Corniche come from 3 brands — ATP, PIONEER and TRANSTEC. The "Popular" part is ATP JMS9.
The Banner Kit (Overhaul Kit + Friction Clutch Plates) section lists 2 options from ATP and PIONEER — grouped under the catalog's "Banner Kit (Overhaul Kit + Friction Clutch Plates)" designation — the notes column spells out what sets them apart. ATP JM10 is listed in this group.
The Deluxe Kit (Master Kit + Filter, Band & Common Bushings) section lists 1 option from PIONEER — grouped under the catalog's "Deluxe Kit (Master Kit + Filter, Band & Common Bushings)" designation — the notes column spells out what sets them apart. PIONEER 753024 is listed in this group.
In the Master Kit (Overhaul Kit + Friction & Steel Clutch Plates) grade, ATP and PIONEER supply 3 parts: grouped under the catalog's "Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)" designation — the notes column spells out what sets them apart. A representative part number is ATP JMS9.
The Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings) section lists 4 options from ATP, PIONEER and TRANSTEC — grouped under the catalog's "Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)" designation — the notes column spells out what sets them apart. ATP JGS52 is listed in this group.
Shift Improvement Kit
Daily Driver
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSGO Popular | SK400 | 🇺🇸 US | Shift KitFor 400 Transmissions | View on Amazon |
| PIONEER | 765010 | 🇺🇸 US | Trans. code THM400Improver Kit | View on Amazon |
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 | View on Amazon |
High Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSGO Popular | 40012 | 🇺🇸 US | Reprogramming KitWith Gear Command | View on Amazon |
| TRANSGO | 4003 | 🇺🇸 US | Reprogramming KitWith Manual Shift Control | View on Amazon |
| TRANSGO | 400PRO | 🇺🇸 US | Reprogramming KitWith Gear Command | View on Amazon |
This table covers the Shift Improvement kits.
6 Shift Improvement Kit parts are listed for the 1973 Bentley Corniche, from TRANSGO, PIONEER and ATP. TRANSGO SK400 carries the "Popular" badge.
The Daily Driver section lists 2 options from TRANSGO and PIONEER — grouped for everyday commuting duty. TRANSGO SK400 is listed in this group.
The Heavy Duty section lists 1 option from ATP — rated for severe service. ATP JK1 is listed in this group.
In the High Performance grade, TRANSGO supplies 3 parts: engineered beyond original-equipment specification. A representative part number is TRANSGO 40012.
Listed part numbers: TRANSGO SK400, PIONEER 765010 and ATP JK1, plus the other parts above.
Shift Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 8792S | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| ATP | SO19 | 🇺🇸 US | Trans. code THM400 | View on Amazon |
| PIONEER | 759022 | 🇺🇸 US | Trans. code THM400 | View on Amazon |
| SCHAEFFLER | SS2114 | 🇺🇸 US | 3 speed trans.Trans. code THM400 | View on Amazon |
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.
4 Shift Shaft Seal parts for the 1973 Bentley Corniche come from 4 brands — ACDELCO, ATP, PIONEER and 1 other brand.
This group includes ACDELCO 8792S, ATP SO19 and PIONEER 759022 and the remaining parts above.
Shift Solenoid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PIONEER | 771002 | 🇺🇸 US 🇨🇦 CA | detentshort wire | View on Amazon |
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.
This group shows a single part: PIONEER 771002.
Sprag
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JX53 | 🇺🇸 US 🇨🇦 CA | Intermediate Clutch | View on Amazon |
| PIONEER | 764029 | 🇺🇸 US 🇨🇦 CA | Intermediate clutch sprag | View on Amazon |
This table covers the one-way sprag clutches in the transmission.
2 Sprag parts for the 1973 Bentley Corniche come from 2 brands — ATP and PIONEER.
Part numbers include ATP JX53 and PIONEER 764029.
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) | View on Amazon |
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.
One part is listed for the 1973 Bentley Corniche — DURA-BOND 8623944.
Sun Gear Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PIONEER | 755066 | 🇺🇸 US | Trans. code THM400Driven Sprocket Support | View on Amazon |
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.
This group shows a single part: PIONEER 755066.
Torque Converter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TC REMANUFACTURING | B3 | 🇺🇸 US | Trans. code THM400Standard Stator, 3 Mounting Pads | View on Amazon |
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.
One part is listed for the 1973 Bentley Corniche — TC REMANUFACTURING B3.
Torque Converter Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER | SR3506 | 🇺🇸 US | 3 speed trans.Trans. code THM400 | View on Amazon |
This table covers the wear sleeves used to restore a Torque Converter seal surface.
This group shows a single part: SCHAEFFLER SR3506.
Torque Converter Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER | SS2912 | 🇺🇸 US | 3 speed trans.Trans. code THM400 | View on Amazon |
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.
This group shows a single part: SCHAEFFLER SS2912.
Transmission Fluid Additive
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LUBEGARD Popular | 19610 | 🇺🇸 US | Instant Shudder Fixx2 oz | View on Amazon |
| LUBEGARD Popular | 60902 | 🇺🇸 US | Automatic Transmission Fluid Protectant10 oz | View on Amazon |
| ATP | AT202 | 🇺🇸 US 🇨🇦 CA | Automatic Transmission Fluid Synthetic Protectant | View on Amazon |
| LUBEGARD | 19689 | 🇺🇸 US | Instant Shudder Fixx2 oz | View on Amazon |
| LUBEGARD | 63010 | 🇺🇸 US | Platinum Universal ATF Protectant10 oz | View on Amazon |
| LUBEGARD | 63016 | 🇺🇸 US | Platinum Universal ATF Protectant15 oz | View on Amazon |
| 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 | View on Amazon |
| LUBEGARD | 63032 | 🇺🇸 US | Platinum Universal ATF Protectant32 oz | View on Amazon |
This table covers the conditioners and additives used with this transmission fluid.
8 Transmission Fluid Additive parts are listed for the 1973 Bentley Corniche, from LUBEGARD and ATP. LUBEGARD 19610 carries the "Popular" badge.
This group includes LUBEGARD 19610, LUBEGARD 60902 and ATP AT202 and the remaining parts above.
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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