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Old 10-13-2020, 12:27 PM
Join Date: Jan 2019
Location: Staffordshire, UK
Posts: 10
Defiance_co is on a distinguished road
E53 4.8is Front Diff Preload Setting


No good telling you all of my tales of woe ..........

I fubared and hit my passenger side diff case (USA etc Drivers side) where drive shaft goes in the seal, i have lost so much hearing i didn't hear shaft pop out and clouted her again, of cause i put a small crack in the cast case as the pry bar had nowhere else to go except inwards into case lol

I have all the tooling to add a new diff i got, i have a rebuild kit and all seals etc for the swap

Thing is, i've been searching over a week without success for the crush sleeve preload

I've found the spec for the rear diff but not the front

At worst i thought checking preload on replacement diff before i strip but actual preload figure/s be great

Going doolally searching the net lol

Any help/specs be greatly appreciated



Last edited by Defiance_co; 10-13-2020 at 12:29 PM. Reason: spellingz
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Old 10-13-2020, 01:12 PM
Join Date: Mar 2016
Location: Saskatchewan Canada
Posts: 1,031
80stech is on a distinguished road
Preload spec is for new pinion brgs. so trying to measure before taking it apart would probably give you a really low reading. I don't think you could go wrong using the spec for the rear diff though assuming you are using new bearings?
1988 325is (purchased new)
2004 X5 3.0 (new to me) 2005 X3 2.5 (new to wife)
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Old 10-13-2020, 01:34 PM
Join Date: Jan 2019
Location: Staffordshire, UK
Posts: 10
Defiance_co is on a distinguished road

Yeah the kit is all new bearings/races outer seals (got o-rings and diff to block seal and odds n sods from bmw)

Will set to work stripping the new-to-me diff tomorrow

I will go with the rear spec for my new bearing type unless i get any info beforehand

Just waiting on engine brace to get delivered, typically i dumped a barely used engine crane due to lack of storage space lol

Thanks for the reply :-)

Have Fun

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