T98 4-Speed Borg-Warner Manual Transmission Parts Jeep CJ6
Bearings, Seals & Shift Mechanism for Reliable Shifting (1955–1975).
Why the T98 Manual Transmission in the Jeep CJ6 Needs Attention After Decades.
The Warner T98 was a rugged 4-speed manual transmission used through much of the CJ6's production run from 1955 to 1975, often paired with a Dana 18 or Dana 20 transfer case. After decades in service, almost every remaining T98 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. The gasket between the transfer case and transmission, along with complete gasket and seal kits, are usually overdue for replacement after this much time. Mainshaft nuts and washers loosen, and the shift mechanism with its poppet balls suffers from years of use. Anyone restoring or fully overhauling their T98 should inspect and replace these wear parts in time.
- Input Shaft & Mainshaft Bearings: The input shaft bearing along with the rear mainshaft bearing.
- Mainshaft Nut & Washer: The mainshaft washer together with the mainshaft nut itself.
- Seals & Gasket Kit: The input shaft oil seal, the transfer case to transmission gasket, and the complete gasket and seal kit.
- Shift Mechanism: The poppet ball for precise gear engagement.
American Manufacturing Quality for Your T98.
All parts for the T98 manual transmission – from bearings to gasket kits and the poppet ball – 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 T98 Overhauls in the Jeep CJ6.
Whether you need a single wear part or a complete transmission rebuild with a gasket kit, 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.