The 1971 Bentley Corniche has 62 automatic transmission parts with verified fitment on this page — 23 part types and 16 brands, covering the 6.8L V8 engine. Each part includes a manufacturer part number and application notes.
The automatic transmission on the 1971 Bentley Corniche covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. The largest groups are Transmission Fluid Additive (8 parts), Extension Housing Seal (5 parts) and Fluid Pan Gasket (5 parts). The other 20 part types cover the remaining 44 parts.
The 1971 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 1971 Bentley Corniche, led by ATP (8 parts), DURA-BOND (7 parts) and LUBEGARD (7 parts), plus 13 more brands. Quality grades include High Performance, Standard Replacement and Daily Driver.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1971 Bentley Corniche. 5 parts have it, including NATIONAL 9449 (Extension Housing Seal) and FEL-PRO TOS18621 (Fluid Pan Gasket). 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 1971 Bentley Corniche come from 2 brands — ATP and PIONEER.
Listed part numbers: ATP JX58, ATP JX60 and PIONEER 767043, plus the other parts above.
Bushing Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | TK54 | 🇺🇸 US | Trans. code THM400 | View on Amazon |
| DURA-BOND | TK54HP | 🇺🇸 US | High Performance Kit | View on Amazon |
This table covers the Bushing kits.
DURA-BOND supplies both parts for the 1971 Bentley Corniche.
Part numbers include DURA-BOND TK54 and DURA-BOND TK54HP.
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 1971 Bentley Corniche — DURA-BOND 02101.
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 1971 Bentley Corniche come from 2 brands — ATP and PIONEER.
Part numbers include ATP JO16 and PIONEER 762008.
Extension Housing Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Popular | 9449 | 🇺🇸 US | 3 speed trans.Trans. code THM400 | View on Amazon |
| NATIONAL | 5208 | 🇺🇸 US | Type: 74Includes Bushing | View on Amazon |
| SCHAEFFLER | SS2960 | 🇺🇸 US | Type of construction: FmsaMetal, Spring, Auxiliary Lip | 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.
5 Extension Housing Seal parts for the 1971 Bentley Corniche come from 3 brands — NATIONAL, WJB / INMOTION PARTS and SCHAEFFLER. The "Popular" part is NATIONAL 9449.
This group includes NATIONAL 9449, NATIONAL 5208 and SCHAEFFLER SS2960 and the remaining parts above.
Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | TF29 | 🇺🇸 US | OE Replacement | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | B29 | 🇺🇸 US | Includes: (1) Gasket, (1) ScreenPremium Replacement | View on Amazon |
| PIONEER | 745041 | 🇺🇸 US | Includes (1) Gasket, (1) Screen | 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.
3 Filter parts are listed for the 1971 Bentley Corniche, from ATP and PIONEER.
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 2 options from ATP and PIONEER — built to original-equipment specification. ATP B29 is listed in this group.
Listed part numbers: ATP TF29, ATP B29 and PIONEER 745041.
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 | W39341 | 🇺🇸 US | Cork-RubberAutomatic Transmission Oil Pan Gasket | View on Amazon |
| MAHLE / CLEVITE | W39341TC | 🇺🇸 US | Cork with Metal CarrierAutomatic Transmission Oil Pan Gasket | View on Amazon |
| VICTOR REINZ | 711493800 | 🇺🇸 US 🇨🇦 CA | 3 speed trans.Trans. code THM400 | View on Amazon |
| VICTOR REINZ | 711989300 | 🇺🇸 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.
5 Fluid Pan Gasket parts are listed for the 1971 Bentley Corniche, from MAHLE / CLEVITE, VICTOR REINZ and FEL-PRO. FEL-PRO TOS18621 carries the "Popular" badge.
Listed part numbers: FEL-PRO TOS18621, MAHLE / CLEVITE W39341 and MAHLE / CLEVITE W39341TC, 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 1971 Bentley Corniche.
Listed part numbers: DURA-BOND 44034 and DURA-BOND 44034TG.
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 1971 Bentley Corniche come from 3 brands — BCA, NATIONAL and WJB / INMOTION PARTS.
Part numbers include BCA NS88187, NATIONAL 99187 and WJB / INMOTION PARTS WS99187.
Fluid Pump Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NS6712NA | 🇺🇸 US | Front3 speed trans. | View on Amazon |
| NATIONAL | 6712NA | 🇺🇸 US | Front3 speed trans. | 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.
3 Fluid Pump Seal parts for the 1971 Bentley Corniche come from 3 brands — BCA, NATIONAL and WJB / INMOTION PARTS.
Part numbers include BCA NS6712NA, NATIONAL 6712NA and WJB / INMOTION PARTS WS6712NA.
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 1971 Bentley Corniche, from ROSTRA, ATP and PIONEER. ATP JX76 carries the "Popular" badge.
This group includes ATP JX76, PIONEER 747024 and ROSTRA 510017 and the remaining parts 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 1971 Bentley Corniche come from 2 brands — NATIONAL and WJB / INMOTION PARTS.
Listed part numbers: 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 1971 Bentley Corniche, from BCA and SCHAEFFLER.
This group includes BCA NS9449 and SCHAEFFLER SS2962.
Rebuild Kit
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 | 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 |
Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSTEC | 81000348 | 🇺🇸 US 🇨🇦 CA | without PistonsDuraprene Pan Gasket | View on Amazon |
This table covers the rebuild kits for this assembly.
3 Rebuild Kit parts for the 1971 Bentley Corniche come from 3 brands — PIONEER, ATP and TRANSTEC.
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 supplies 1 part: 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 1 option from TRANSTEC — grouped under the catalog's "Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)" designation — the notes column spells out what sets them apart. TRANSTEC 81000348 is listed in this group.
Part numbers include PIONEER 753024, ATP JMS9 and TRANSTEC 81000348.
Shift Improvement Kit
Daily Driver
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSGO | SK400 | 🇺🇸 US | Shift KitFor 400 Transmissions | View on Amazon |
High Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSGO | 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.
TRANSGO supplies the 4 Shift Improvement Kit parts for the 1971 Bentley Corniche.
The Daily Driver section lists 1 option from TRANSGO — grouped for everyday commuting duty. TRANSGO SK400 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.
Part numbers include TRANSGO SK400, TRANSGO 40012 and TRANSGO 4003, among others listed above.
Shift Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 8792S | 🇺🇸 US 🇨🇦 CA | Gold | 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.
2 Shift Shaft Seal parts for the 1971 Bentley Corniche come from 2 brands — ACDELCO and SCHAEFFLER.
Listed part numbers: ACDELCO 8792S and SCHAEFFLER SS2114.
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 1971 Bentley Corniche — DURA-BOND 8623944.
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 1971 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 1971 Bentley Corniche, from LUBEGARD and ATP. LUBEGARD 19610 carries the "Popular" badge.
Listed part numbers: LUBEGARD 19610, LUBEGARD 60902 and ATP AT202, plus the other parts above.
Buying Automatic Transmission Parts for a 1971 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: Transmission Fluid Additive and Extension Housing Seal .
Frequently Asked Questions
How many automatic transmission parts fit the 1971 Bentley Corniche?
Our catalog currently lists 62 automatic transmission parts for the 1971 Bentley Corniche across 23 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 1971 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 1971 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 1971 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 1971 Bentley Corniche
Automatic Transmission Parts for Other Bentley Corniche Years
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