Symptoms
On a 1985 CJ-7 thread, a T-5 behind the 258 popped out of first and third, grinding on downshifts.
The fix, step by step
- Jeep-CJ.com members' options: rebuild the T-5 with new bearings and synchros, or replace it.
- They call the T-176 the easiest swap, though the driveshafts must be modified for length.
- One owner fitted a Ford T-18 using an Advance Adapters kit, a replacement output shaft and four drilled-and-tapped bellhousing holes, and kept his driveshafts.
- Replace the clutch while the gearbox is out.
- The T-4 and T-5 take ATF+4 (2 qt), per ExtremeTerrain.
Tools & part numbers
- Transmission jack
- snap-ring pliers
- bearing puller
- adapter kit if swapping
Where to buy the parts
Crown J8134034 cluster gear bearing, 1981–86 CJ T-4/T-5Quadratec ↗Amazon ↗
Crown J8134018 input shaft thrust bearing, 1982–86 CJ T-4/T-5Quadratec ↗Amazon ↗
Crown J5359411 transmission adapter gasket, 1980–86 CJ T-176Quadratec ↗Amazon ↗
Crown 3240278K clutch kit, 1982–86 CJ 4.2LQuadratec ↗Amazon ↗
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Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.