Trev_SS

iTrader: (17)

I am going to be switching rear end gears when I swap my m6 for a Th400. I am wandering what gears will be decent for the car. It is a H/C car with nitrous that will have a 28in tires if that makes a difference. I will be driving the car on the street and still want to take it to work on an occasion so it will see highway. I was really considering a 3.73 for the rear end or would a 3.42 be better. Let me know what you guess that have TH400's are thinking. Thanks Trevor

Duffster

iTrader: (103)

the 3.42 sounds good...

I've got 4.30 rears and about to install TH400 myself... I plan on driving street 90%

Trev_SS

iTrader: (17)

LOL I will be switch gears for sure 4.30's are crazy. I will see street and highway 95% of the time too.

Duffster

iTrader: (103)

Yeah.... with the 4.30 I've got once I've finished installing my TH400, my 65-70 mph will be near 4K rpm. . . . . . . That might be a bit monotinous .. .. .. Seeing as I don't have cruise, a radio or a good set of headphones Tire size normally on the street is around 25.5-26".

With a few changes on the page linked below, you can figure your speeds and engine speeds...

http://vexer.com/automotive-tools/speed-rpm-calculator

zeekracing

iTrader: (5)

I run a 28" tire with a th400 and 3.73 I was really happy with how it drove.

Trev_SS

iTrader: (17)

How was it driving on the freeway?