ZF6 to ZF8 upgrade!

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Al Pizzica

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The best I've seen is in the C5/C6 corvettes (manual shifter), 6th gear was .50:1, so think 65 MPH freeway speeds right off 1K RPM idle. Pretty amazing.
You brought back memories of driving my C5 half way across the country at 90mph in uniform so when the cops stopped me they would let me go(happened once) and calculating that I got 30mpg when I would stop for gas.
 

itsaguything

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IMHO the ZF8 is a much better all around transmission. I've had the 6 in two land rovers and the 8 in two BMWs. Hands down the 8 is the better shifter. The 6 is nearly always in the wrong gear, I feel, or just doesn't have the gear it should be in. The ZF8 is put into many of the best cars in the world. Check out the Wikipedia article on it.
I don't disagree with you. And that's not to say there is anything wrong with the 6hp either. Sounds more like the management sw in your bimmer was the issue. What is the matter is the lack of maintenance.
 

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