National 710760 Manual Transmission Output Shaft Seal

Manual Transmission Output Shaft Seal for S10 and Sonoma

National 710760 is a manual transmission output shaft seal built for vehicles using the New Process 1500 transmission. It is specified for 1996-2003 Chevrolet S10 and 1996-2003 GMC Sonoma applications, with dimensions and lip design matched to the shaft and housing bore requirements.

Key Features

• Polyacrylate sealing material for transmission oil resistance
• Inside diameter: 1.502 in. / 38.150 mm
• Outside diameter: 2.144 in. / 54.450 mm
• Thickness: 0.488 in. / 12.400 mm
• Counter-clockwise spiral lip design
• Housing bore: 2.136 in. / 54.250 mm
• Overall width with side lip: 1.079 in. / 27.400 mm

Detailed Description

This National 710760 oil seal is engineered for the manual transmission output shaft location, where consistent sealing around the shaft is critical. The polyacrylate construction and counter-clockwise spiral lip design support controlled sealing performance in the transmission environment, while the listed shaft, bore, and width dimensions help match the OE-style fit for the New Process 1500 transmission used in Chevrolet S10 and GMC Sonoma trucks.

National has supplied sealing solutions for more than 75 years, and this part reflects that focus on transmission sealing accuracy. This part cross-references Carlson 14234 for the same application.

What It Helps Address

• Transmission fluid seepage at the output shaft
• Oil residue around the rear of the manual transmission
• Seal wear from shaft rotation and heat exposure
• Leaks caused by an aged or hardened output shaft seal
• Loss of fluid level related to a damaged transmission seal

Installation Notes and Tips

Verify transmission type before ordering: this seal is listed for Chevrolet S10 and GMC Sonoma models with the New Process 1500 transmission. Confirm shaft diameter, housing bore, and seal width against the removed part before installation. Clean the bore and shaft surface thoroughly, and inspect for scoring or wear that could affect sealing performance.

Quality Assurance

National designs sealing components for current vehicle service needs and backs this part with the brand’s long-standing experience in transmission sealing systems. Part number 710760 is built to the listed dimensional specifications for the confirmed applications.