1991 auto tranny with a 1992 auto tranny (e34) - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 03-12-2004, 06:09 PM
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I found a transmission off of a 1991 e34 that is automatic... Will that be directly swappable with my 1992 auto tranny? I'm pretty sure that both the 91 and 92 e34s had the m50 engine... But I just want to double check this.. Any input would be appreciated!

Also, How long do you think it would take a mechanic to swap the transmissions out? I'd like to estimate the labor bill...


Thanks a lot.

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#2 (permalink) Old 03-12-2004, 11:22 PM
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you have to watch out. in 1991 (as far as i know, and bmwe34.net says it also) there was both the m50 and the m20. 92 on had the m50 for sure.

and the swap shouldn't take that long, since it is only removal and instalation without anything else.

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#3 (permalink) Old 03-13-2004, 05:00 AM
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Yep. As Indigo said there were M20s and M50s both. M50s at the end of the year. Or so I heard.

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#4 (permalink) Old 03-13-2004, 01:23 PM
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thats wierd...

i looked at buying a 91 525 , i dont remember if it was the m50 or m20, but.... it was manufactured in 9/90 and the papers said it was a 91. The one i ended up buying was manufactured in 9/90 and the papers say it is a 90. lol... so i wouldnt doubt that there were both engines in one year.

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#5 (permalink) Old 03-13-2004, 04:02 PM
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Crap... I better find out

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#6 (permalink) Old 03-13-2004, 05:48 PM
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You have to check the make and model of the transmission. There were a few different transmissions used. Everything has to work with your current EGS module and programming, not to mention the harness.

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#7 (permalink) Old 03-13-2004, 06:08 PM
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i purpose this question, why do you want an auto tranny?

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im so hardcore. i dont even have cup holders
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#8 (permalink) Old 03-13-2004, 07:17 PM
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So even if the engine is also an m50 it may not be directly swappable? This sounds kinda fishy...

As for the auto--My auto tranny is dying right now and I dont wanna pay $100000 in labor to convert it from an auto to manual...

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#9 (permalink) Old 03-13-2004, 07:22 PM
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If it is from an m50 engine... what would I need to do a conversion if it's not the same exact make/model tranny?

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