Diff Swap
Turbothrush
The ti's use the E30 rearend
All other E36 use a newer E36 rear
The Eta rear is a bolt in for the ti, and they are cheap because no one wants them.
If you were to buy an E36 318 to get four doors, then you could use a six cylinder 2.93 and get the same result.
Or just get a 1991 318i, which is an E30 body style with four doors and buy an Eta diff.
Cecil
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