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      05-27-2018, 06:27 PM   #1
crowtrobot
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128i 6MT - Stuck Driveshaft

Attempting to swap in a new pumpkin this weekend to change my final drive and upgrade to an LSD, and I've used desertman123 's excellent diff swap thread (http://www.1addicts.com/forums/showthread.php?t=1418770) and everything was going great until I found that the diff and the driveshaft refuse to separate after I've dropped the pumpkin

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I've hit it with a few passes of PB Blast, been whacking away with a rubber hammer, chiseling away with a pick, tried jamming a hex driver in that gap between the u-joint and the input flange and rolling like a strut spreader, nothing's working.

Anyone ever run into this, or have a good suggestion for separating these two flanges?
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      05-28-2018, 01:41 AM   #2
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Let it sit in wd40 for a while and hammer it. If it dosent work, you have to heat it up and hammer it because there seem to be rust
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      05-28-2018, 09:54 AM   #3
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Just let it soak for a bit. Maybe raise the car higher up so you can really get a good wack at it
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      05-28-2018, 12:08 PM   #4
crowtrobot
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Thanks for the encouragement guys. Overnight soak in PB and then a paint scraper to get things started for the crowbar, and now it's out!

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Shocker - the diff cover's being difficult too, but hopefully the same approach will work there as well...

(if not, that's a reasonably cheap replacement at least)
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      05-29-2018, 07:33 AM   #5
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Quote:
Originally Posted by crowtrobot View Post

Shocker - the diff cover's being difficult too, but hopefully the same approach will work there as well...

(if not, that's a reasonably cheap replacement at least)
Look into the E60 Finned diff cover; looks cool and would help keep an LSD cool, plus I think they have a proper drain plug...
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      06-05-2018, 04:47 PM   #6
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Is there an actual need to keep the LSD cooler than it would be on its own?
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      06-06-2018, 02:18 PM   #7
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Quote:
Originally Posted by networkstatic View Post
Is there an actual need to keep the LSD cooler than it would be on its own?
Depends on how you use/abuse the diff. Usually with a clutch-type, you want to keep it cool to reduce wear and prevent damage. With a helical-type, they don't generate much heat at all, and won't need the cooling.
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