T90 3-Speed Borg-Warner Transmission Parts for Jeep CJ5
Bearings, Repair Kit and Shift Components for Your 3-Speed Transmission (1955–1971).
Why the T90 Transmission in the Jeep CJ5 Wears Out After Decades of Use.
The T90 transmission served for decades as the standard 3-speed gearbox in Willys and early Jeep CJ models and is regarded as a rugged, proven part of the drivetrain. Even after this long service life, typical wear appears: gaskets and seals harden over time and start leaking, letting gear oil escape and leaving gears and bearings under-lubricated. Bearings on the input shaft and mainshaft wear out, causing whining noises or noticeable play. Nuts loosen from vibration, and spacers wear down, increasing end-play. The shift mechanism – poppet ball and shift knob – also suffers from decades of use and becomes stiff. Rebuilding your T90 or replacing individual wear parts noticeably restores smoothness and shifting comfort.
- Bearings: The main shaft output bearing and input shaft bearing keep the gear train running smooth and quiet.
- Repair Kit: The T90/T150 rebuild kit bundles bearings, seals, gaskets and small parts for a complete overhaul.
- Mainshaft Hardware: The mainshaft nut secures the mainshaft, and the spacer sets the correct end-play.
- Shift Mechanism: The poppet ball and shift knob provide precise, comfortable shifting.
American Engineering for Your T90 Transmission.
Whether it's a single bearing or a complete rebuild kit, every part for the T90 transmission comes from Crown Automotive, one of the most established American manufacturers in the Jeep and Willys parts market. Built to series-production quality, these reproductions meet OEM specifications and reflect American engineering, made in the USA.
Your Partner for the T90 Transmission Rebuild.
Whether you're planning a full rebuild or a targeted parts swap, we're happy to advise on installation order, torque specs, and the differences between the T90 and the related T14, T15, or T98 gearboxes. We can also help with compatibility questions for Willys or early CJ models. Orders ship from our warehouse within the next business day, so you can get back to work quickly.