Checks, in order
- Find the leakClean the housing and drive a short loop, then look. Oil around the flange is the pinion seal, oil at the wheel end is an axle seal, and oil at the cover is the gasket.easy $ · under about $50
- Fluid level and conditionCheck the level at the fill plug. Milky fluid means water got in, and heavy metal on the drain plug magnet is a warning sign.easy $ · under about $50
- BreatherMake sure each differential breather is clear. A blocked breather builds pressure and pushes oil out past the seals.easy $ · under about $50
- Noise patternNote if the whine is on throttle, on coast or at a certain speed. A driveshaft u-joint or a wheel bearing can sound like a differential, so check those first.medium $ · under about $50
- Seals and bearingsSeals are straightforward for a shop. Gear noise needs backlash and bearing preload checked, and may need a rebuild.hard $$$ · shop-level job, $500+
Applies to: US-market UZJ100 Land Cruiser and Lexus LX 470, 1998 to 2007, with the 2UZ-FE 4.7L V8 (timing belt). AHC items apply to the LX 470 only; most US Land Cruisers have conventional shocks. Transmission is the A343F or A750F depending on year, so check the fluid spec for your truck.
Tools and parts for these checks
Links below are Amazon affiliate links: as an Amazon Associate, toyotadata earns from qualifying purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Gear oil for your truck | Changing diff oil to the factory spec | Shop on Amazon |
| Fluid transfer pump | Filling through the fill or check plug | Shop on Amazon |
| Axle seal | Replacing a leaking axle or pinion seal | Shop on Amazon |
| UV leak detection kit | Pinpointing exactly where a leak starts | Shop on Amazon |
Other drivetrain problems on the 100 Series Land Cruiser / Lexus LX 470
More 100 Series Land Cruiser / Lexus LX 470 problems
- Timing belt due, squeal or rattle from the front of the engine, or coolant and oil weeping at the front (Engine)
- Engine temperature gauge climbing, overheating or losing coolant (Cooling)
- Turn the key: click or nothing, engine won't crank (Starting & Charging)
- Engine cranks normally but won't start (Fuel & Ignition)
- Rough idle, stumbling or a misfire code (P0300 to P0308) (Fuel & Ignition)
- Check engine light with P0171, P0174 or air-fuel sensor codes (P2195, P2197) (Fuel & Ignition)
All 15 100 Series Land Cruiser / Lexus LX 470 symptoms in the interactive troubleshooter →
General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.