318i auto diff ratio

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ben-yatess
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Wed Mar 11, 2015 5:59 pm

hi just wondering if anyone could tell me what ratio my diff is, im doing an m50 swap and wondering if its going to be geared to high

cheers
jmc330i
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Wed Mar 11, 2015 6:12 pm

What gearbox are you using? This will determine what ratio diff you need.

If yours is a facelift 318i I think the ratio is 4.45:1, but the 318i uses the weaker small case diff which isn't really recommended for 24v swaps. You ideally need a medium case diff which is stronger.
James
'91 325i Sport
'93 318i touring 16v
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ben-yatess
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Wed Mar 11, 2015 9:35 pm

im using a zf320

im going to weld the diff as im using the car for drifting so not sure if this will make it stronger?
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