Pioneer Cables 750038 Automatic Transmission Overhaul Kit

Automatic Transmission Overhaul Kit for THM400 Applications

Pioneer Cables 750038 is an automatic transmission overhaul kit for service work that requires disassembly and resealing. It is built for leaking transmissions and internal repairs on a wide range of classic GM, Jeep, Jaguar, Cadillac, and Rolls-Royce applications.

• Overhaul kit for automatic transmission service and resealing
• Includes gaskets, seals, O-rings, pan gasket, rubber lip seals, metal clad seals, sealing rings, and other application-specific components
• Used for internal transmission repair after teardown
• Compatible with select THM400, THM475/M40, THM350, and 3L80 applications where listed
• Pioneer Cables part number 750038

Detailed Product Overview

Pioneer Transmission Repair Kits are organized into multiple service levels, and this Overhaul Kit provides the sealing components needed for a comprehensive transmission service. For vehicles such as the Chevrolet C10, GMC K1500, and Cadillac DeVille, the kit supports resealing work when the transmission has been opened for repair. This part number, 750038, is listed across many 1969-1987 applications and is a direct service solution for transmission leaks and internal maintenance.

This part cross-references BBB Industries 13989 and Four Seasons 14093 for the same application.

Common Problems This Kit Addresses

• Transmission fluid leaks from worn gaskets or seals
• Seepage at the pan gasket or case sealing surfaces
• Internal reseal needs after transmission disassembly
• Service repairs involving hardened O-rings or lip seals
• Seal replacement during overhaul work on older automatic transmissions

Fitment Highlights

• Fits 1987 Chevrolet Blazer, N/A
• Fits 1987 GMC Jimmy, N/A
• Fits 1987 Jaguar XJ6, N/A
• Fits 1981-1987 Rolls-Royce Silver Spirit, N/A
• Fits 1975-1979 Jeep Cherokee, N/A
• Fits 1970-1974 Chevrolet Camaro, N/A
• Fits 1969-1981 Cadillac DeVille, N/A
• Fits 1969-1974 Buick LeSabre, N/A
• Fits 1970-1974 Pontiac GTO, N/A
• Fits 1975 Chevrolet Monte Carlo, N/A

Installation Notes and Tips

Use this kit during a full transmission teardown and reseal procedure. Verify the transmission model and application notes before installation, especially where the listing specifies THM400, THM350, THM475/M40, or 3L80 coverage, and where extension housing seal coverage is excluded. Clean all sealing surfaces thoroughly before assembly and replace worn hard parts as needed during service.

Quality Assurance

Pioneer Cables transmission repair kits are offered as pre-packaged service solutions for overhaul work, with components selected for the listed application coverage.