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th400 on freeway?!!

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Old 04-23-2006, 10:28 PM
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Default th400 on freeway?!!

All you guys running the th400 what are your rpms like say around 75mph?
Old 04-23-2006, 11:10 PM
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post what gears as well...
Old 04-23-2006, 11:33 PM
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3.42 rear
3000RPM@65MPH
255/50R16 M/T DR

Last edited by NEVR2ND; 04-24-2006 at 08:49 AM.
Old 04-23-2006, 11:47 PM
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Just put your car in 3rd (or 4th for M6) and see what rpms your at. Its the same thing 1:1. FWIW, 3.50 gears, stock 17" tire size, TH350 at 60mph is about 3,000.

Ppl should include tire size as well. I know a couple ppl rolling on 28" tall street tire setups, that changes things.
Old 04-24-2006, 12:30 AM
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TH400 with 3.73 gears and 26 inch tall tire.
60 MPH = 3100 RPM.
Thats if the factory tach is right.
Plan on going to 28 inch tire soon, hope to drop it to 2800 or so.

I dont go over 60 cruisen on the hiway.
Old 04-24-2006, 02:16 AM
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http://www.albinsgear.com.au/formulae.html
Old 04-24-2006, 05:45 AM
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i have 3.23 and are at 2750 at 65 and 75 is around 3100. on 275/40's. a friend has 3.42's and 65 is 3000 even.
Old 04-24-2006, 07:05 AM
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wow.. that means no more long trips for me..lol
Old 04-24-2006, 06:11 PM
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I have stock gears. is a th400 with stock gears going to allow me to trap into the 120-122 mph range?




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