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Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Toyota Land Cruiser Prado (J150): Front Differential Removal and Overhaul

The Prado J150 front differential is mounted to the body or subframe and connects to the driveshaft and the front wheel axle shafts. Remove it when you see leaks, whine while driving, pinion play, metal shavings in the oil, or after collision damage. The exact procedure and gear mesh specifications for this model are not documented in open sources. What follows is a proven general sequence; take torque values and clearances from the manufacturer's service manual.

Difficulty: Hard Time: 5-8 hours (removal and installation); an overhaul with bearing replacement and gear setup typically takes another 4-6 hours Steps: 15 Tools: Lift or pit with secure supports, transmission jack or stand for the differential, torque wrench, socket and box-end wrench set, seal puller, seal and bearing drivers, press, dial indicator with magnetic base, feeler gauge, gear marking compound for the contact pattern, oil-resistant sealant, drain pan

Part

  • 🔩 Front differential rebuild kit (pinion seal, axle seals, gaskets or sealant, locking elements), pinion and differential bearings, adjustment shims or rings, GL-5 75W-90 gear oil (capacity and specification per the fluid capacity table for your trim). The ring and pinion gear must be replaced only as a matched set and the original is expensive, so first determine what is actually worn. Check the OE part numbers for your trim by VIN in the Toyota parts catalog

Step by step

15 steps
  1. Preliminary diagnosis. Check the oil level and condition in the differential and inspect the leak points. Make sure the whine or hum is coming from the differential and not from the wheel bearings, tires or transfer case. To do this, check the pinion flange for radial and axial play, and rotate the axle shafts.
  2. Preparation. Park the vehicle on level ground and chock the rear wheels. Disconnect the negative battery terminal, raise the vehicle on the lift and lift the front end. Remove the front wheels and the front axle and oil pan skid plate, if fitted.
  3. Drain the oil from the differential through the drain plug. Inspect the oil and the plug for metal particles: fine gray dust is acceptable, while large particles indicate serious wear.
  4. Disconnect the front driveshaft from the differential flange. First mark the flange and the shaft so that the balance is preserved at assembly. Do not pull on the shaft or let it hang from its joints; tie it off to the side.
  5. Disconnect the axle shafts (half-shafts) from the differential. To do this, remove the lower ball joints or control arms, move the hubs outward and carefully pull the inner joints out of the differential. Do not bend the CV joints beyond their permitted angle, and do not leave an axle shaft hanging by its boot. Plug the seal openings to keep dirt out.
  6. Disconnect the electrical connectors and the differential breather hose, if present on your trim. Mark their positions.
  7. Position a transmission jack or stand under the differential and secure it with a strap. Remove the differential mounting bolts. Check the number and location of the mounting points on the vehicle itself; remove the harder-to-reach ones first and keep the last ones in place until the differential is resting on the jack. Carefully lower the differential and roll it out, keeping its weight in mind (several tens of kilograms).
  8. Clean the outside of the differential. Before disassembly, mark the position of the covers, the differential carrier bearing caps and the adjusting nuts or shims so everything can be returned to its original place. Measure and record the gear backlash and the pinion bearing preload before disassembly: this is your reference for assembly.
  9. Disassemble the differential: remove the differential bearing caps, take out the carrier assembly, and remove the pinion flange (its nut is tightened very hard, so hold the flange with a special holding tool). Inspect the teeth for chipping, scoring and pitting, and inspect the bearing seats and bearings. If the contact pattern is normal and the gear set is intact, replace only the seals and bearings.
  10. Seal and bearing replacement. Press the bearings on with a driver applied to the inner or outer race, never transmitting force through the rolling elements. Install the seals with a light coat of lubricant on the lip, seated evenly in the bore without cocking. If you replace the pinion bearings, set the preload by checking the rotating torque, not simply by tightening the nut: use a new self-locking nut or crush sleeve only once.
  11. Gear mesh adjustment. Set the backlash between the gears by selecting shims or rings to the value in the manufacturer's service manual, then check the contact pattern with marking compound on several teeth. The correct pattern should sit closer to the middle of the tooth, without shifting toward the edge. Set the backlash and the differential bearing preload within factory tolerances. If you lack the tools and experience, take this part to a specialized axle shop.
  12. Assemble the differential and tighten all fasteners, the bearing caps and the pinion nut to the specified torque. Use new single-use fasteners and gaskets or sealant on the mating surfaces.
  13. Installation is done in reverse order: raise the differential with the jack, secure it with the mounting bolts (torque per the service manual; treat the bolts with rust protection beforehand and clean the threads), insert the axle shafts until they lock with their retaining rings, connect the driveshaft using the marks, and reconnect the connectors and hose. Check the condition of the CV joint boots and replace any that are damaged.
  14. Fill with GL-5 75W-90 oil up to the lower edge of the fill hole, then install and tighten the drain and fill plugs. Lower the vehicle and check the level again after a short drive.
  15. Post-repair check. Over the first 500-1000 km, check for leaks and the housing temperature. Listen for whine under acceleration and when coasting, and if any unusual noises appear, check the adjustments immediately. A wheel alignment is advisable if the control arms or ball joints were removed.

Common mistakes and warnings

  • This is work on a drivetrain component that affects handling and safety. Incorrect gear mesh adjustment and bearing preload quickly lead to whine and destruction of the differential. Work only on secure supports, and never get under the vehicle supported by a single jack. If you lack the experience and tools to adjust the ring and pinion, remove the differential yourself and leave the repair to a specialized axle shop. Tighten the driveshaft and critical suspension connections only to the specified torque, and use new fasteners where they are single-use.