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Old 1st September 2017, 06:17 PM   #61
Mrd1984
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Bearing in mind that a different pinion shim will require different side shims..
it's a ****ing **** design from Bmw that the race needs removing each time to shim the pinion. Hence a dummy bearing whilst building.
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Old 1st September 2017, 06:25 PM   #62
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Bearing in mind that a different pinion shim will require different side shims..
it's a ****ing **** design from Bmw that the race needs removing each time to shim the pinion. Hence a dummy bearing whilst building.
However when you've been building Nissan Skyling/200sx diffs for last 15 years and you have to press the bearing off the pinion each to remove the shim from the back of it you end up loving the BMW system. :-p

If you have dummy bearings then it's not so bad.

The type of gears that are used in BMW diffs its actually more important what the pinion patten is saying, not the patten only on the crown.

This is why adjustments make very little impact on the final patten, but can be riding the pinion too low or high no problem at all.

See it too often.
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Old 1st September 2017, 06:30 PM   #63
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Bearing in mind that a different pinion shim will mean a different side shim.
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Old 1st September 2017, 06:32 PM   #64
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However when you've been building Nissan Skyling/200sx diffs for last 15 years and you have to press the bearing off the pinion each to remove the shim from the back of it you end up loving the BMW system. :-p

If you have dummy bearings then it's not so bad.

The type of gears that are used in BMW diffs its actually more important what the pinion patten is saying, not the patten only on the crown.

This is why adjustments make very little impact on the final patten, but can be riding the pinion too low or high no problem at all.

See it too often.
Agree with you 100%
Pinion pattern is crutial!
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Old 2nd September 2017, 07:15 AM   #65
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Where did pics go?
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Old 2nd September 2017, 12:08 PM   #66
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Where did pics go?
Still there on page 3
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Old 2nd September 2017, 01:52 PM   #67
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Hard to see pattern but here was mine and it's silent.


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Old 2nd September 2017, 08:10 PM   #68
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Hard to see pattern but here was mine and it's silent.


What diff is this? as it's different to what's on csl
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Old 2nd September 2017, 08:29 PM   #69
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Its a standard e46 m3 LSD. CSL have a different one
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Old 2nd September 2017, 09:59 PM   #70
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Its a standard e46 m3 LSD. CSL have a different one
Yes for sure is,don't remember reading that on csl spec info, must read that again, Definitely different to mine
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Old 2nd September 2017, 10:05 PM   #71
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Thanks schooner32!
Can you let me know what contact paste you got? Your pattern is much clearer then mine.
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Old 3rd September 2017, 08:01 AM   #72
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Thanks schooner32!
Can you let me know what contact paste you got? Your pattern is much clearer then mine.
It's sudocream and blue food dye

If I was doing it again I would like the pinion to sit a little deeper and the re do the back lash. I feel like my drive side contact should be a little more towards the root of the tooth. But in fairness I have zero issue and it's far quieter than I expected a 4.1 to be. It's no different to stock in terms of noise.

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Old 3rd September 2017, 09:38 AM   #73
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Wasn't yours a second hand gear?
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Old 3rd September 2017, 11:21 AM   #74
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Nope.

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Old 3rd September 2017, 02:04 PM   #75
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Nope.
I couldn't remember, it looked new lol I would have believed you without the picture you know :P
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Old 3rd September 2017, 03:05 PM   #76
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I couldn't remember, it looked new lol I would have believed you without the picture you know :P


You should go back to diff building. Seems to be a few in need
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Old 3rd September 2017, 05:01 PM   #77
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Who could build my diff for me using 4.1 CWP from BMW? Mines whining on acceleration and deceleration and it's been diagnosed as diff bearings, want to stick the CWP in at the same time but want someone that knows what they are doing. I'm in south London, was thinking of just buying the bearing kit from bearingkits.co.uk but may source them separate if it's a lot cheaper.

I take it the 4.1 is worthwhile?
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Old 14th September 2017, 10:42 AM   #78
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Hey guy,

Finished installing new CWP together with new bearings and seals. I was trying to research the process of breaking in the new CWP and bearings but info is not conclusive. Whats your view on that?
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