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Discussion Starter #1
so my 2001 325 had a bad trans, I put a 2004 used trans in.

immediately came up with code output speed circuit p0720. I cleared code and drove vehicle, it came out of limp mode cog went off dash and I thought I was in the clear.

vehicle slams into 2 and 3rd then back into limp mode and drives fine.

code came up p0733 and 732 Gear 2 incorrect ratio and gear 3 incorrect ratio.

trans is a hp 19 ZF

If I put car in manual 1, 2, or 3 put emergency brake on rev car up no slippage whatsoever

any ideas?
 
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