Symptoms
Not a fault. The rear LSD on many GUs isn't enough on rocky climbs and cross-axle ruts.
The fix, step by step
- First find out which rear diff you have.
- Harrop's GU ELocker and the Detroit H233 unit suit the H233B only, and the GU used both H233B and H260 rear centres.
- Remove the axles and carrier, swap the ring gear onto the locker, and fit new carrier bearings.
- Set preload and backlash and check the tooth pattern before refilling.
- Air lockers need a compressor and air line, and electric lockers need wiring to a dash switch.
- Shops usually do this, because a bad setup ruins the ring and pinion.
Tools & part numbers
- Bearing puller and press
- dial indicator
- inch-pound torque wrench
- marking compound
Where to buy the parts
Hunting a used or discontinued part? Search eBay Motors for Nissan Patrol Y61 (GU) 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.