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DIY: Do It Yourself
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Old 03-05-2015, 06:56 PM   #1
Smwillrich
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E36 to e46 welded diff swap???

Can this be done? Is it compatible? My buddy has an e36 318 diff laying around and I want to weld it up if it is compatible I have a 2000 328i sedan and plan on sliding it with the lower gear ratio from the 318 diff! Someone help thanks!
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Old 03-05-2015, 08:08 PM   #2
invisible man
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Completely different case.
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Old 03-05-2015, 10:36 PM   #3
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Yeah, you'll need an E46 diff. Assuming that you have a 5 speed*, a 3.46 diff would be cheap to purchase & great to weld up. Understand that there are "Cons" to a welded diff if you don't already realize this.


Good luck,
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* If you have an Auto trans, you already have a 3.46 diff.
Then you want a 3.64 diff, which will most likely be harder to find.
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Old 03-06-2015, 01:22 AM   #4
Smwillrich
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I had a feeling they were two completely different cases just didn't dig deep enough to find it out myself, and yes it's a 5 speed. So knowing that now the question is does every 5 speed e46 diff bolt right up. I want to find a 318 diff for the lower gear ratio.
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Old 03-06-2015, 02:16 AM   #5
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E46 318i has smaller diff case (168K) than the 320> models (188K)
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Old 03-06-2015, 02:38 AM   #6
Smwillrich
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hmm.. Well that sums that up for me. So a welded 3.46 is the way to go huh?
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Old 03-06-2015, 01:55 PM   #7
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hmm.. Well that sums that up for me. So a welded 3.46 is the way to go huh?
The 3.46 diff is about a 18% increase over your current 2.93 diff and it's relatively easy to purchase. Everyone that does this mod seems to really like it, I'm sure you will too.


Good luck,
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Old 03-07-2015, 12:41 AM   #8
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Anyone know where I can find a non welded 3.46 diff in the states? I live in Washington state and will pay for shipping at the right price.
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Old 03-07-2015, 02:03 AM   #9
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Anyone know where I can find a non welded 3.46 diff in the states? I live in Washington state and will pay for shipping at the right price.
ebay?
http://www.ebay.com/sch/i.html?_from...Text=&_sacat=0
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