342 rear end question???????????????
Melting Slicks
Joined: Jun 2001
Posts: 2,743
Likes: 3
From: Davie Florida
If you have 3.42 gears you should be at 2150 RPM locked up in 4th gear at 70 MPH. You should not be at 2500 RPM at 70 MPH if your car is shifting into 4th gear and locking up. It sounds to me like your car might not be locking up in 4th assuming you really have 3.42s. FWIW my car has 3.73s and I am at only 2350 RPM at 70 MPH locked up in 4th gear. 
Last edited by Mitch C; Oct 16, 2005 at 07:57 AM.
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Race Director
Joined: Oct 2004
Posts: 12,861
Likes: 4,661
Originally Posted by Chuck01
Just doubled check and that is high. At 75 you should be at 2250 rpm.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by grinder11
Maybe he's got small (real) tires. Seriously, has anyone questioned the tire sizes? Also, is it true that the 6 speeds need no re-cal on the speedo? I have heard that the A4 cars do, but not the 6 speeds. Please advise, though a little off topic. Sorry.
read here:
http://mikemercury.home.att.net/342.htm
Melting Slicks
Joined: Jun 2001
Posts: 3,123
Likes: 3
From: Orland Park Illinois
St. Jude Donor '06-'07
With stock tires (26.7" Dia.) in D (4th gear) at 70 mph, a 3.42 gear C5 will produce approx. 2100 rpm's...If your reading are much higher than that, the tires are not 26.7" Dia., you don't have a 3.42 gear or your tach is wrong....Good luck in sorting it out.
