Pioneer Cables 759090 Automatic Transmission Oil Pump Drive Shaft Seal

Automatic Transmission Oil Pump Drive Shaft Seal

Pioneer Cables 759090 is an automatic transmission oil pump drive shaft seal for a wide range of GM and related applications. It is an exact-fit replacement part built for the oil pump drive shaft position, with fitment covering many Chevrolet, Pontiac, Buick, Oldsmobile, Cadillac, and Isuzu models.

Key Features

• Direct replacement automatic transmission oil pump drive shaft seal
• Exact-fit replacement from Pioneer Transmission Components
• Fits applications using the oil pump drive shaft position
• Supports service work on 1980-2001 vehicles across multiple platforms
• Cross-references National 340849 for the same application

Detailed Description

This Pioneer Cables 759090 seal is used at the automatic transmission oil pump drive shaft to help maintain sealing integrity in the transmission assembly. It is listed for many long-tail fitment searches, including 1995-2001 Chevrolet Cavalier oil pump drive shaft seal, 1995-2001 Pontiac Sunfire transmission seal, and 1990-1993 Chevrolet Lumina oil pump drive shaft seal. Additional coverage includes Buick Century, Pontiac Grand Am, Oldsmobile Cutlass Ciera, and other front-wheel-drive platforms that use the same seal location.

Pioneer Transmission Components are positioned as exact-fit replacement parts, making this seal a practical choice for transmission service where the original seal at the oil pump drive shaft has worn, hardened, or begun to leak. Part number 759090 is also referenced by AMS Automotive 6120 and National 340849.

What This Part Is Used For

• Transmission fluid leakage at the oil pump drive shaft area
• Seal wear from age, heat, and fluid exposure
• Service replacement during transmission rebuild or overhaul
• Restoring sealing performance in GM automatic transmissions
• Addressing seepage on vehicles such as Chevrolet Cavalier and Pontiac Sunfire

Installation Notes and Tips

Verify transmission family and application notes before installation, especially where the listing specifies 3T40, THM125/M34, or THM125C coverage. Clean the sealing bore and shaft area thoroughly, inspect the shaft for scoring, and confirm the seal is seated squarely during assembly. Always match the part number 759090 to the vehicle and transmission configuration before service.

Quality Assurance

Pioneer Transmission Components are marketed as exact-fit replacement parts for transmission service. This part cross-references National 340849 for the same application.