HomeTransmission > Gaskets and Sealing SystemsTimken 3907 Automatic Transmission Extension Housing Seal
Part #: 3907

Timken 3907 Automatic Transmission Extension Housing Seal

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⚙️ 16 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick and Cadillac, Riviera, Eldorado, and Seville
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Reliable Automatic Transmission Extension Housing Seal for Buick and Cadillac

The Timken 3907 Automatic Transmission Extension Housing Seal is designed to provide a precise fit and dependable sealing performance for select Buick and Cadillac models. Engineered to maintain transmission integrity, this seal helps prevent fluid leaks and ensures smooth operation in your vehicle's transmission system.

Key Features of Timken 3907 Transmission Seal

  • Compatible with Buick Eldorado, Cadillac Riviera, and Cadillac Seville models
  • Designed specifically for automatic transmission extension housing applications
  • Durable construction to resist wear and maintain sealing under pressure
  • OEM-quality fitment for reliable installation and performance
  • Part number 3907 ensures correct replacement for specified vehicles

Detailed Description of the Timken 3907 Seal

This Timken Automatic Transmission Extension Housing Seal (part number 3907) is engineered to meet the exact specifications required by Buick Eldorado, Cadillac Riviera, and Cadillac Seville automatic transmissions. The seal prevents transmission fluid leakage at the extension housing, which is critical for maintaining proper hydraulic pressure and transmission function. Manufactured with materials that withstand heat and friction, this seal supports long-term durability and consistent performance in demanding driving conditions.

Common Applications and Issues Addressed

  • Prevents transmission fluid leaks from the extension housing area
  • Helps maintain proper transmission fluid pressure for smooth shifting
  • Reduces risk of transmission damage caused by fluid loss
  • Addresses wear-related seal failures in older Buick Eldorado and Cadillac models
  • Supports restoration of transmission integrity during rebuilds or repairs

Installation Notes and Tips

  • Ensure the transmission extension housing surface is clean and free of debris before installation
  • Use appropriate tools to avoid damaging the seal during installation
  • Verify compatibility with Buick Eldorado, Cadillac Riviera, or Cadillac Seville before replacing
  • Inspect surrounding components for wear or damage during seal replacement
  • Follow vehicle manufacturer torque specifications when reassembling

Quality Assurance and Warranty Information

Timken manufactures the 3907 Automatic Transmission Extension Housing Seal to meet industry standards for durability and fitment. While specific warranty details may vary, Timken products typically come with a limited warranty against defects in materials and workmanship. This seal is produced to provide consistent performance and reliability for Buick Eldorado, Cadillac Riviera, and Cadillac Seville transmissions.

This part fits 16 vehicles. Search below:

YearMakeModelTransmissionPositionNotes
1985BuickRivieraAutomaticN/A
1985CadillacEldoradoAutomaticN/A
1985CadillacSevilleAutomaticN/A
1984BuickRivieraAutomaticN/A
1984CadillacEldoradoAutomaticN/A
1984CadillacSevilleAutomaticN/A
1983BuickRivieraAutomaticN/A
1983CadillacEldoradoAutomaticN/A
1983CadillacSevilleAutomaticN/A
1982BuickRivieraAutomaticN/A
1982CadillacEldoradoAutomaticN/A
1982CadillacSevilleAutomaticN/A
1981BuickRivieraAutomaticN/A
1980BuickRivieraAutomaticN/A
1979BuickRivieraAutomaticN/A
1979CadillacEldoradoAutomaticN/A

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

This part directly replaces or is cross-referenced with the following part numbers:

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