Holy Grail of diff upgrade for 6 speed and 4 speed auto with 'few more HP"
Step 1, need LSD unit: Find E46 M3 differential and buy it, extract LSD unit. (cross compatible, shimming needed).
Step 2 need donor 210mm E31 diff case: (use the useless BMW 840 2.81 open diff.)
Step 3 Profit! (sorry could not resist the south park reference Step 3 is find the unobtanium 3.45 gear set in depths of Russia, buy and ship it over.
Step 4, put together the whole collection of complete replacement bearings, seals and clutches:
IMG_20170329_105758.jpg
Finally step 5, assembly:
3.jpg9.jpg16.jpg19.jpg
I have 2 diffs to make 1 LSD...I am interested in this
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There are a bunch of 3.45 diffs in EU from E34 535 manual,, they also have the 210mm casing,, and afaik,, the E32 735 also ad 3.45 210 mm casing
Last edited by B10 BITURBO; 04-24-2017 at 11:37 PM.
Sveinbjörn Hrafnsson
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