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Manual Transmission Main Shaft Seal; Bearing Seal (76-79 Jeep CJ5 & CJ7)Find parts that fit my vehicle

Item J145121-CJ
ExtremeTerrain no longer carries the Manual Transmission Main Shaft Seal; Bearing Seal (76-79 Jeep CJ5 & CJ7). Please check out Jeep CJ7 Engine Performance Parts for 1976-1986 Wrangler for an updated selection.
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    Product Information

    Features, Description, Q&A, Specs & Installation

    Features

    • Manual Transmission Main Shaft Seal
    • Premium Nitrile Rubber Construction for Superior Oil Resistance
    • Dual-Lip Design to Prevent External Leaks and Contaminant Ingress
    • Specifically Designed for Tremec T-150 3-Speed Transmissions
    • Restores Case Fluid Integrity and Proper Lubrication Levels
    • Prevents Gear Oil Migration into the Transfer Case Adapter
    • Precision Machined for a Press-Fit Seal into the Rear Bearing Retainer
    • Resistant to High Operating Temperatures and Gear Lubricant Chemicals
    • Two-Hour Installation
    • Limited Lifetime Warranty
    • Fits 1976-1979 Jeep CJ5 & CJ7 Models

    Description

    Restored Fluid Retention and Driveline Protection. The Manual Transmission Main Shaft Seal for 1976-1979 Jeep CJ5 & CJ7 is a high-performance oil seal designed to prevent gear lubricant from escaping through the rear of the transmission case. By maintaining a tight, spring-loaded interface with the rotating main shaft, this seal protects your vital internal gears from the catastrophic damage caused by low fluid levels. It is a critical replacement for aging mid-to-late seventies CJ gearboxes, such as the Tremec T-150, ensuring that your 4WD system remains properly lubricated and your driveway stays free of messy gear oil stains.

    Advanced Elastomeric Material for High-Heat Resistance. Built to endure the extreme thermal cycles of the transmission tunnel, the Manual Transmission Main Shaft Seal for 1976-1979 Jeep CJ5 & CJ7 is manufactured from premium nitrile rubber or polyacrylate compounds. These materials are specifically formulated to resist the chemical additives in modern EP (extreme pressure) gear lubricants while remaining flexible across a wide temperature range. Whether you are navigating slow, high-heat technical trails or cruising at highway speeds, this seal provides a robust, wear-resistant barrier that prevents fluid seepage and keeps trail contaminants from entering the housing.

    Installation. Putting this Manual Transmission Main Shaft Seal; Bearing Seal on your Jeep CJ5 & CJ7 takes 2 hours to install.

    Warranty. There is a limited lifetime warranty on this product.

    Application. The Manual Transmission Main Shaft Seal; Bearing Seal fits 1976-1979 Jeep CJ5 & CJ7 models.

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    Installation & What's in the Box

    Installation Info

    Installation Time

    (approx) 2 Hours

    Difficulty Level:

    Light to Moderate mechanical skill required.

    Installation Guides

      No guide available for this part yet.

    What's in the Box

    • (1) Manual Transmission Main Shaft Seal
    • (1) Rear Bearing Seal

    Tech Specs

    4.6

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    Questions & Answers

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