My 4.10 lsd acted up so it was time to take it aside. Two ring gear bolts had come off and relaxation had been hand tight. I assume my semi onerous locking compound melted away. Bolt(s) jammed gear in order that it did not go backwards in any respect. One of many friction plates had all tooth minimize off and stress plate was toasted. Metallic flakes in all places. Bearings needed to go so full construct for this was so as.

Machine store turned and resurfaced stress ring alright. Took 0.30 mm off. They informed me that ZF p/rings have 1-1.5 mm onerous floor to work with so it needs to be effective. However i needed to attempt one thing else for ramps. This one had oe 45/45 ramps. Took my 4.45:1 diff and took lsd unit out for this one. This unit has Drexler p/rings (50/70 & 45/80 ramps), one clutch set either side and lightest doable springs in it. So it is in essence zero preload unit.

Half record:

SKF bearings, pinion: HM 88542/2/510/2/QCL7C, HM 89449/2/410/2/QLC7C

                         facet: LM 503349A/310/QCL7C

OE gaskets, pinion: 31 50 7 609 535

                      facet: 33 10 7 505 602

crush washer: 33 12 1 744 368

Torques:

Ring gear bolts: 55 Nm + 55 deg. Locite 270.

lsd lock unit cowl: 33 Nm. Semi-hard locking compound.

Some pics in random order…