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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-31-2003, 06:24 PM   #1
Roose
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Help with Diff Swap

I had hoped to try out a 3.07 differential in my 330Ci (2.93 OEM diff) cause I picked up one from a 323 pretty cheaply.
Looks like the input flange (where driveshaft attaches) are different. I had thought that E46s swapped right in but obviously that's wrong.
Anyone that can offer up advice on this? Can I easily swap out the flange or is this going to require a kit or something for redoing seals etc.?
Here's a picture of the part number off of the 3.07 diff. If anyone has an ETK maybe they can help me research this a bit, see if this even can be done. Thanks
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Old 05-31-2003, 07:11 PM   #2
BimmerPhan
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You should be able to just use the flanges from your 2.93 and swap them onto the 3.07

Try a search for more info on how to remove them.
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Old 06-01-2003, 02:19 AM   #3
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i am searching for similar info, i cant seem to find any either, i think i am picking up a 323i step diff for free and i want to know what i need to swap it out!
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Old 06-01-2003, 05:48 PM   #4
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Mike,

All you will need to do is swap the flanges from your current diff. Very straightforward and not time consuming at all. I suggest throwing on a Z4 diff cover as well
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    Old 06-02-2003, 07:21 AM   #5
    Roose
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    Thanks gents,
    I had dropped out the cross brace, heat sheild, exhaust, etc., then stopped. Luckily I was also doing the UUC exhaust so it wasn't a waste of time.
    Looks like I'll have to pick up a special socket to get that thing off.
    I just didn't want to take it off and find that I needed seals or something.
    Just to be sure, here's a pic of what I need to swap, the original as 3 pairs of torx bolts, this one shows four holes for the bolts and 2 larger holes for who knows.
    Johnny, the Z4 part fits!? Have a part number?
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    Old 06-02-2003, 04:25 PM   #6
    JawKnee
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    Mike,

    Contact RichP and/or Ben from RE. Per Ben's suggestion (I believe), they installed the Z4 diff cover for Rich's diff swap. Try looking for his post on the install from e46.*************
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