Symptoms
About 3,250 rpm at 75 mph in fourth gear.
The fix, step by step
- On post-4/1985 trucks the H55F is direct-fit.
- Drain and remove the driveshafts, starter, clutch slave and transfer-case shift lever, support the engine and drop the four-speed.
- Replace the clutch, pilot bearing and rear main seal, resurface the flywheel, then fit the H55F with its fifth-gear oiler, plug the crossbar hole in the transfer case and use new gaskets and staked nuts.
- Pre-4/1985 trucks also need shift-linkage and driveshaft changes.
- The 0.84 fifth drops highway rpm to about 2,750 at 75 mph.
Tools & part numbers
- Transmission jack
- 32 mm and 36 mm sockets
- clutch alignment tool
- clutch kit
- gaskets
- fifth-gear oiler
Where to buy the parts
H55F 5-speed transmission, OEM (1985–87)Cruiser Corps ↗Amazon ↗
Clutch kit, FJ40/45/55/60 1974–87Cruiser Corps ↗Amazon ↗
Rear main seal, FJ40/45/55/60 1958–87Cruiser Corps ↗Amazon ↗
Clutch pilot bearing (1985 4.2L)RockAuto ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Toyota Land Cruiser FJ60 parts →
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.