Vehicle & Technical > Discovery

Help - Disposable diff syndrome. My 200Tdi is eating them

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omara04:
Hello all. I was after some opinions / advice on what to do, and if anyone else has had (and cured) a similar problem.

My truck is a 1993 200Tdi disco, and i've put a +2" lift and 265/75 16 Insa Turbo Special tracks;  I keep destroying rear diffs. Additionally I've uprated the pump through tweaking, and increased the boost on the blower to get a bit more oomph.

However, the problems didn't start until I got the big tires. The first diff was a 10-spline, and that began to wear rather rapidly until one day it went pop when I was offroading. I replaced that with a 24-spline unit (supposedly able to handle more torque), and that went in a similar fashion, this time without any warning.

2nd hand diffs change owners for about £50, but I don't want the hassle of continually replacing them.

So I wondered what anyone else had done? Mr Alford (also on here) has exactly the same mods (save for the increased fuelling) and he's yet to even put a scratch on his diff, and now I'm on my 3rd. I've heard talk about 4-pin diffs being virtually unbreakable, but then does that mean the next "weakest link" in the chain will simply break instead? e.g. halfshafts, transfer box etc. etc.?

Any advice welcomed!

Ta

discowoman:
driving style? prop twisted out of line? lack of oil?

stewy1984:
i'd say its the special tracks mate, ive got the same mods but just use 265/75 m/t's and have had no diff problems yet.

Benjamin:
Those tyres grip like hell.  :evil: Try less revs  =; let the tyres do the work  :-k

But if you cant help your self like me fit a air locker and ashcroft shafts!

Where do the diffs normaly go? Crown and pinion or planetary gears? Exsessive wheel spining will build up heat in the planetary gears and weeken them. Crown and pinion failer can be down to worn barings or just too much load. pegging the crown wheel can help to prevent this.

Disco-Ron:
Tyres and driving style i'd say..... i fitted 285 75's on my disco, and did 3 diffs in almost as many weeks..... now gone back to 235 85's, and no more probs... he says touching wood......... also, don;t just sit spinning the wheels, diffs don;t like it!!

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