T15 3-Speed Borg-Warner Manual Transmission Parts Jeep CJ6
Gears, Bearings & Shift Mechanism for Reliable Shifting (1955–1975).
Why the T15 Manual Transmission in the Jeep CJ6 Needs Attention After Decades.
The Warner T15 was a rugged 3-speed manual transmission Jeep installed mainly in the later CJ6 production years, often paired with a Dana 20 transfer case. After such a long service life, almost every remaining T15 shows the same wear patterns: the input shaft oil seal hardens and starts leaking, letting gear oil escape and starving internal lubrication. The bearings on the input shaft and rear mainshaft wear down from decades of rotation, causing noticeable play or running noise, while the internal gears – first and foremost the first gear – wear down from constant load. The clutch throwout fork suffers from constant use, and the shifter boot, poppet ball, and shifter knob are essential for a precise shift feel. Anyone restoring or fully overhauling their T15 should inspect and replace these wear parts in time, before more serious transmission damage occurs.
- Internal Gearing: The first gear for direct power transfer when starting off.
- Bearings: The transmission bearing kit, the rear mainshaft bearing, and the input shaft bearing.
- Seals: The input shaft oil seal and the complete gasket and seal kit.
- Mainshaft Nut & Washer: The mainshaft washer together with the mainshaft nut itself.
- Shift Mechanism: The shifter boot, the poppet ball, and the shifter knob.
- Clutch Actuation: The clutch throwout fork for reliable power transfer when disengaging the clutch.
American Manufacturing Quality for Your T15.
All parts for the T15 manual transmission – from gears and bearings to the clutch throwout fork – come from Crown Automotive, one of the best-known names in the American spare parts market for classic Jeep and Willys vehicles. These reproductions are built to OEM-quality standards and reflect proven American engineering that still holds up after decades in the field.
Your Partner for T15 Overhauls in the Jeep CJ6.
Whether you need a single wear part or a complete transmission rebuild with a bearing kit and seals, we're happy to advise you on installation order, oil fill capacity and torque specs, as well as compatibility questions regarding other transmission variants like the T14, T18 or T150. Most items ship from stock and go out to you shortly.