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Old 18-03-2010, 04:15 PM   #1
TANKSLAPPER
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Default Diff change

I was think of changing my diff and was wondering who else has done this and why !
My reason is there is a lot of slack and one side of my diff output shaft is loose with the other side leaking oil

And do you change the drive shafts as well as the prop shaft

I had A price back from BMW for an exchange diff £1,000.00 + VAT

Drive shafts at one at £430.00 and the other at £399.00 incl vat Prop shaft at £605.00 incl vat


Please give me your thoughts
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Old 18-03-2010, 04:25 PM   #2
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Treat yourself to a Drexler plated diff
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Old 18-03-2010, 05:35 PM   #3
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TS

ive just swapped my diff to 4.10 but i am keeping my old diff to put back in later, either if i dont like the 4.10 or for sellng the car

Im not alteritng the shafts at all however it would have been a good time to do it as BMW have just cut the back of my car off and then welded it up again
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Old 18-03-2010, 06:00 PM   #4
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TS

BMW have just cut the back of my car off and then welded it up again
Split rear floor from uprated suspension?
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Old 18-03-2010, 06:07 PM   #5
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My old M3 (just sold) had a significant amount of play in the offside driveshaft.. the guy was who was inspecting it for the purchaser reckoned it wasn't an issue, and should be expected on a car with 50K miles. At some point it might need the seal replacing, but that's all.
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Old 18-03-2010, 06:09 PM   #6
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Split rear floor from uprated suspension?
Standard problem, happens with standard suspension too.
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Old 18-03-2010, 07:14 PM   #7
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Split rear floor from uprated suspension?
no standard suspension rear floor failure on subframe mount positions - bmw goodwill
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Old 18-03-2010, 05:58 PM   #8
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The chances of wearing out the actual crown wheel and pinion is fairly slim. I would say that the driveshaft CV joints could be worn? Also consider potential wear in the diff bearings. To be honest, most diffs will have quite a bit of play in them if you jack up the rear wheels and turn one of the wheels back and forth - they make a nasty clonking noise even when they are new. I'd just replace the seal and crack on mate.

Having just re-built the gearbox in the golf, there was hardly any wear on the crown wheel and pinion, it tends to be all the other stuff that holds everything together that wears and causes problems - the actual gears themselves were fine, and this baby had done over 160,000 miles, and probably most of those miles were abusive in a Mk2 Golf GTI.

Most of the cases that I heard about that require new diffs are the ones where people have done a significant amount of drifting on dry tarmac, which puts too much load through the slip plates and hence wears them out. A few dealers have changed them unecessarily - in general, they a fairly strong units.

Some people have gone for shorter diffs so they can use all 6 gears on short UK circuits, but it does means that a long trip down the motorway will probably make your ears bleed after an hour. The top speed will be lower, the acceleration will be quicker and it will make the gears closer together (not to be confused with a close ratio box).
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Old 18-03-2010, 08:41 PM   #9
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reading all the faults on these csl`s there pretty shit really!
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Old 18-03-2010, 09:12 PM   #10
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reading all the faults on these csl`s there pretty shit really!
WHA?!?!
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