SKF 12329 Manual Transmission Seal - Front

OE Quality 60-Day Returns

SKF 12329 Manual Transmission Seal - Front

Brand	SKF 12329
Position	Front
Width	0.188
Outside Diameter	1.629
Sealing Surface Type	Nitrile
Shaft Diameter	1.250
Fits	Buick, Chevrolet, GMC, Oldsmobile, and Pontiac · 97 vehicles

Nitrile sealing surface. Helps keep lubricants in and contaminants out.

Precision-made seal. Built to specific designs for the right application and environment.

SKF seal heritage. Backed by decades of seal design and development experience.

Cross-references Gates 12049, Gates 361120 and 47625 for the same application. See all 10.

$12.79Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

Free return shipping if it doesn't fit when you check fitment here first.

Confirm position

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

Step 2 — Quantity

Free shipping to the continental U.S.

Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Manual Transmission Seal options

Manual Transmission Seal for Select GM Applications

SKF 12329 is a manual transmission seal built for specific shaft and housing dimensions. It uses a nitrile sealing surface and is sized for a 1.250 shaft diameter, with an outside diameter of 1.629 and width of 0.188 for accurate sealing in the intended application.

Compatible with select Chevrolet, GMC, Buick, Oldsmobile, and Pontiac manual transmission applications, this SKF seal is a direct-fit service part for vehicles such as the Chevrolet S10, GMC Sonoma, and Chevrolet Astro. SKF 12329 is engineered to keep transmission lubricant contained while helping block dirt and moisture from entering the assembly.

Key Features

Manual transmission seal for transmission sealing service
Nitrile sealing surface type for the specified application
1.250 shaft diameter
1.629 outside diameter
0.188 width
Fits select front-position applications and standard configurations where listed
SKF part number 12329 for catalog and cross-reference lookup

Detailed Description

SKF 12329 is designed around the exact dimensions required by the application, helping maintain a proper seal at the transmission shaft interface. SKF has a long history in seal engineering, and this part reflects that focus with premium material selection and manufacturing practices aimed at consistent sealing performance. This part cross-references Gates 12049 and 361120 for the same application.

Fitment includes 1982-1993 Chevrolet S10, 1983-1993 Chevrolet S10 Blazer, 1985-1993 Chevrolet Astro, 1982-1990 GMC S15, 1983-1991 GMC S15 Jimmy, 1991-1993 GMC Sonoma, and 1985-1993 GMC Safari. It also covers 1975-1979 Chevrolet Monza, 1976-1979 Buick Skyhawk, 1976-1979 Pontiac Sunbird, and other listed GM models with front-position applications.

Common Problems This Seal Helps Address

Transmission fluid seepage at the shaft seal area
Contamination entering the manual transmission housing
Wear-related sealing loss from an aging original seal
Leak concerns during transmission service or rebuild work
Fitment issues when replacing a seal with the wrong dimensions

Installation Notes and Tips

Verify shaft diameter, outside diameter, and width before installation to confirm the seal matches the transmission application. Inspect the shaft and sealing surface for scoring, corrosion, or debris before fitting the new seal. Clean the bore thoroughly and install the seal squarely to avoid distortion. Confirm the vehicle listing and position notes, especially for front-position applications and standard configurations.

Quality Assurance

SKF manufactures seals to defined application-specific designs using materials selected for the operating environment. The brand’s seal engineering background and long-term OE-style manufacturing focus support consistent fit and sealing performance in service.

This part fits 97 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Position	Notes
1993	Chevrolet	Astro	N/A	Std.
1993	Chevrolet	S10	N/A	Std.
1993	Chevrolet	S10 Blazer	N/A	Std.
1993	GMC	Jimmy	N/A	Std.
1993	GMC	Safari	N/A	Std.
1993	GMC	Sonoma	N/A	Std.
1992	Chevrolet	Astro	N/A	Std.
1992	Chevrolet	S10	N/A	Std.
1992	Chevrolet	S10 Blazer	N/A	Std.
1992	GMC	Jimmy	N/A	Std.
1992	GMC	Safari	N/A	Std.
1992	GMC	Sonoma	N/A	Std.
1991	Chevrolet	Astro	N/A	Std.
1991	Chevrolet	S10	N/A	Std.
1991	Chevrolet	S10 Blazer	N/A	Std.
1991	GMC	S15 Jimmy	N/A	Std.
1991	GMC	Safari	N/A	Std.
1991	GMC	Sonoma	N/A	Std.
1990	Chevrolet	Astro	N/A	Std.
1990	Chevrolet	S10	N/A	Std.
1990	Chevrolet	S10 Blazer	N/A	Std.
1990	GMC	S15	N/A	Std.
1990	GMC	S15 Jimmy	N/A	Std.
1990	GMC	Safari	N/A	Std.
1989	Chevrolet	Astro	N/A	Std.
1989	Chevrolet	S10	N/A	Std.
1989	Chevrolet	S10 Blazer	N/A	Std.
1989	GMC	S15	N/A	Std.
1989	GMC	S15 Jimmy	N/A	Std.
1989	GMC	Safari	N/A	Std.
1988	Chevrolet	Astro	N/A	Std.
1988	Chevrolet	C1500	N/A	Std.
1988	Chevrolet	K1500	N/A	Std.
1988	Chevrolet	S10	N/A	Std.
1988	Chevrolet	S10 Blazer	N/A	Std.
1988	GMC	C1500	N/A	Std.
1988	GMC	K1500	N/A	Std.
1988	GMC	S15	N/A	Std.
1988	GMC	S15 Jimmy	N/A	Std.
1988	GMC	Safari	N/A	Std.
1987	Chevrolet	Astro	N/A	Std.
1987	Chevrolet	S10	N/A	Std.
1987	Chevrolet	S10 Blazer	N/A	Std.
1987	GMC	S15	N/A	Std.
1987	GMC	S15 Jimmy	N/A	Std.
1987	GMC	Safari	N/A	Std.
1986	Chevrolet	Astro	N/A	Std.
1986	Chevrolet	S10	N/A	Std.
1986	Chevrolet	S10 Blazer	N/A	Std.
1986	GMC	S15	N/A	Std.
1986	GMC	S15 Jimmy	N/A	Std.
1986	GMC	Safari	N/A	Std.
1985	Chevrolet	Astro	N/A	Std.
1985	Chevrolet	S10	N/A	Std.
1985	Chevrolet	S10 Blazer	N/A	Std.
1985	GMC	S15	N/A	Std.
1985	GMC	S15 Jimmy	N/A	Std.
1985	GMC	Safari	N/A	Std.
1984	Chevrolet	S10	N/A	Std.
1984	Chevrolet	S10 Blazer	N/A	Std.
1984	GMC	S15	N/A	Std.
1984	GMC	S15 Jimmy	N/A	Std.
1983	Chevrolet	S10	N/A	Std.
1983	Chevrolet	S10 Blazer	N/A	Std.
1983	GMC	S15	N/A	Std.
1983	GMC	S15 Jimmy	N/A	Std.
1982	Chevrolet	S10	N/A	Std.
1982	GMC	S15	N/A	Std.
1979	Buick	Skyhawk	Front	—
1979	Chevrolet	Monza	Front	—
1979	Oldsmobile	Cutlass	Front	—
1979	Oldsmobile	Cutlass Calais	Front	—
1979	Oldsmobile	Cutlass Salon	Front	—
1979	Oldsmobile	Cutlass Supreme	Front	—
1979	Oldsmobile	Starfire	Front	—
1979	Pontiac	Sunbird	Front	—
1978	Buick	Skyhawk	Front	—
1978	Chevrolet	Monza	Front	—
1978	Oldsmobile	Cutlass	Front	—
1978	Oldsmobile	Cutlass Calais	Front	—
1978	Oldsmobile	Cutlass Salon	Front	—
1978	Oldsmobile	Cutlass Supreme	Front	—
1978	Oldsmobile	Omega	Front	—
1978	Oldsmobile	Starfire	Front	—
1978	Pontiac	Sunbird	Front	—
1977	Buick	Skyhawk	Front	—
1977	Chevrolet	Monza	Front	—
1977	Oldsmobile	Starfire	Front	—
1977	Pontiac	Phoenix	Front	—
1977	Pontiac	Sunbird	Front	—
1976	Buick	Skyhawk	Front	—
1976	Chevrolet	Monza	Front	—
1976	Oldsmobile	Starfire	Front	—
1976	Pontiac	Grand LeMans	Front	—
1976	Pontiac	LeMans	Front	—
1976	Pontiac	Sunbird	Front	—
1975	Chevrolet	Monza	Front	—
No rows match your filter.

Directly replaces or cross-references 10 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Gates — 12049Gates — 3611204762553342460551R91145812329975912329A3216959C10519CHR 12329