23 Drivetrain parts are listed for the 1991 Buick Regal, in 7 part types, covering both the 3.1L V6 and the 3.8L V6. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1991 Buick Regal, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 18 parts of the 23 listed are CV Axle (11 parts), CV Joint Boot (5 parts) and Differential Seal (2 parts). The other 4 part types cover the remaining 5 parts.
The 1991 Buick Regal was sold with both the 3.1L V6 and the 3.8L V6. 22 parts fit every engine; the other 1 is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 1991 Buick Regal drivetrain parts are GSP (3 parts), DORMAN (3 parts) and PIONEER (3 parts), plus 10 more brands. Quality grades include Standard Replacement and Economy.
4 parts on this 1991 Buick Regal page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including GSP NCV10542 (CV Axle) and DORMAN 614003 (CV Joint Boot). Click any part number to see every vehicle that part fits.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: all 1991 Regal engines | 24202835 | 🇺🇸 US 🇨🇦 CA | Front RightIn Case | View on Amazon |
This table covers the seals where an axle shaft exits the 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.
This group shows a single part: GM GENUINE 24202835.
CV Axle
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTO EXTRA Fits: all 1991 Regal engines | GC88542A | 🇺🇸 US 🇨🇦 CA | RightFront | View on Amazon |
| CARDONE Fits: all 1991 Regal engines | 601037 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| CARDONE Fits: all 1991 Regal engines | 601083 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| FAMOUS BRAND Fits: all 1991 Regal engines | NCV10524 | 🇺🇸 US 🇨🇦 CA | RightFront | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP Popular Fits: all 1991 Regal engines | NCV10542 | 🇺🇸 US 🇨🇦 CA | Front RightOptional | View on Amazon |
| TOP NOTCH Popular Fits: all 1991 Regal engines | TN20054 | 🇺🇸 US 🇨🇦 CA | Front LeftLimited | View on Amazon |
| TRAKMOTIVE Popular Fits: all 1991 Regal engines | GM8035 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| APWI Fits: all 1991 Regal engines | GM8042A | 🇺🇸 US 🇨🇦 CA | Front Right4-Wheel ABS (ABS Sensors on all 4 Wheels) | View on Amazon |
| GSP Fits: all 1991 Regal engines | NCV10524 | 🇺🇸 US 🇨🇦 CA | Front RightStandard | View on Amazon |
| GSP Fits: all 1991 Regal engines | NCV10537 | 🇺🇸 US 🇨🇦 CA | Extended Length: 22.72 In | View on Amazon |
| TRAKMOTIVE Fits: all 1991 Regal engines | GM8098 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
This table covers the complete CV axle shafts from differential (or hub) to wheel. Typical signs include a click in tight turns, grease flung around the wheel well, or a vibration that builds with speed. A torn boot caught early is a boot kit; caught late it is the whole axle. Torque the axle nut to the method in the notes.
11 CV Axle parts for the 1991 Buick Regal come from 7 brands — GSP, CARDONE, TRAKMOTIVE and 4 other brands. The "Popular" part is GSP NCV10542. Every part fits both the 3.1L V6 and the 3.8L V6.
The Economy section lists 4 options from CARDONE, AUTO EXTRA and FAMOUS BRAND — the catalog's value-priced group. AUTO EXTRA GC88542A is listed in this group.
In the Standard Replacement grade, GSP, TRAKMOTIVE, TOP NOTCH and 1 other brand supply 7 parts: built to original-equipment specification. A representative part number is GSP NCV10542.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: all 1991 Regal engines | 614003 | 🇺🇸 US 🇨🇦 CA | OuterJoint Diameter 3.44" | View on Amazon |
| DORMAN Fits: all 1991 Regal engines | 614004 | 🇺🇸 US 🇨🇦 CA | InnerJoint Diameter 3.50" | View on Amazon |
| DORMAN Fits: all 1991 Regal engines | 03662 | 🇺🇸 US 🇨🇦 CA | Speedi-BootLarge End ID: 3.54" (90mm) | View on Amazon |
| MEVOTECH Fits: all 1991 Regal engines | DX508 | 🇺🇸 US 🇨🇦 CA | Front Inner | View on Amazon |
| MEVOTECH Fits: all 1991 Regal engines | DX524 | 🇺🇸 US 🇨🇦 CA | Front Outer | View on Amazon |
This table covers the boots that keep grease in a CV joint. Typical signs include a split boot, grease flung around the joint, or a click once grit is inside. A boot caught early is a kit. Once the joint has clicked, the joint itself is usually worn.
5 CV Joint Boot parts for the 1991 Buick Regal come from 2 brands — DORMAN and MEVOTECH. The "Popular" part is DORMAN 614003. Every part fits both the 3.1L V6 and the 3.8L V6.
Listed part numbers: DORMAN 614003, DORMAN 614004 and DORMAN 03662, plus the other parts above.
CV Joint Boot Band
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: all 1991 Regal engines | 364038 | 🇺🇸 US 🇨🇦 CA | Front Outboard OuterLarge Clamp | View on Amazon |
This table covers the bands that clamp a CV boot to the joint.
One part is listed for the 1991 Buick Regal — GM GENUINE 364038.
Differential Pinion Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Fits: 3.8L V6 | 99193 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
This table covers the wear sleeves used to restore a grooved pinion seal surface.
This group shows a single part: NATIONAL 99193.
Differential Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Fits: all 1991 Regal engines | NO87 | 🇺🇸 US 🇨🇦 CA | Right | View on Amazon |
| PIONEER Fits: all 1991 Regal engines | 759028 | 🇺🇸 US 🇨🇦 CA | Right | View on Amazon |
This table covers the seals at the Differential. 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 Differential Seal parts are listed for the 1991 Buick Regal, from ATP and PIONEER. All of them fit every engine offered in the 1991 Regal.
Part numbers include ATP NO87 and PIONEER 759028.
Transfer Case Low Gear Roller Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PIONEER Fits: all 1991 Regal engines | 764012 | 🇺🇸 US 🇨🇦 CA | Roller Clutch3rd clutch | View on Amazon |
| PIONEER Fits: all 1991 Regal engines | 764024 | 🇺🇸 US 🇨🇦 CA | Roller ClutchForward | View on Amazon |
This table covers the Transfer Case Low Gear Roller bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
PIONEER supplies both parts for the 1991 Buick Regal. All of them fit every engine offered in the 1991 Regal.
Part numbers include PIONEER 764012 and PIONEER 764024.
Buying Drivetrain Parts for a 1991 Buick Regal
On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
- Match the engine first. Some drivetrain parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: CV Axle and CV Joint Boot .
Frequently Asked Questions
How many drivetrain parts fit the 1991 Buick Regal?
Our catalog currently lists 23 drivetrain parts for the 1991 Buick Regal across 7 subcategories and 13 brands, covering both the 3.1L V6 and the 3.8L V6. Each part is matched to the engine(s) it fits.
Do drivetrain parts differ between 1991 Buick Regal engines?
Some do. 22 parts fit every engine; the other 1 is engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of drivetrain problems on a 1991 Buick Regal?
Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. 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 differential or transfer-case fluid with any axle or seal job while everything is already open.
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 1991 Buick Regal 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 1991 Buick Regal?
First match the engine — each row shows which engine(s) the part fits. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1991 Buick Regal
Drivetrain Parts for Other Buick Regal Years
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