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Does anyone have 391s or 373s in their a4.How does it effect drivability.Where are the rpms usually at on the highway.
 

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May I quote you on that?
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You might want to check the Aussie site, too. They've been tweaking gears for quite a while.
 

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Aussi Web Site Address

http://www.ls1.com.au/

I have a Monaro with 3.91 ratio in the arse end, its a much nicer alternative and makes better use of the 6 gears. A friend fitted a converter and a set of 3.73's on his <a href="http://www.ntsearch.com/search.php?q=auto&v=56">auto</a>, its also BLOWN - start saving for rear tyres is all i have to say !!

Ciao PRO LS1 Monaro !!
 

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The Anti Dyno Racer
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In my C5, the 3.73 with the auto is a good blend of highway manners and performance. 60 foots like a mother too, with the right converter. The higher numerically you go with the gears, the "tighter" the converter will feel if you run a big stall. I can still manage 26-27 MPG highway and RPMs are only a couple hundred above when I was running 3.42s. You'll love 3.73s, trust me :)
 

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Age old saying...

"Don't fear the gear..."

I wish there were even more selection!
4.10-4.30-4.56 ???

Ed
 

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3.73 for the A4 and 3.91 for the M6 would seem to be the best bet. You could argue that the numerical difference between 3.46, 3.73 is not that huge so it woud retain some civility.

I wouldn't consider anything more than 3.91 in a A4 unless you are just drag racing the car.
 
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