2.73 to 3.42 swap
Thread Starter
Member
Joined: Mar 2001
Posts: 176
Likes: 0
From: plainwell MI US
Car: 1992 pontiac firebird
Engine: 305 tbi
Transmission: 700r4
2.73 to 3.42 swap
I have a '92 firebird 305tbi/700r4. I would like to swap the rear gear to 3.42s. What kind of 70mph rpm can I expect. Any problems to look out for?. Any quesses what kind of 0 to 60 improvement?
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
As far as the RPM: 3.42 / 2.73 * whatever it is now.
Hard to say about your times, I'd guess anywhere from .3 to .5 sec is typical, every car is different.
You'll have to either replace the carrier with a 3-series, in which case the thing to do would be to get one from SLP; or use the special gears; or use a ring gear spacer. I'd recommend option 1 which will give you a posi as well as accomodating the gear change gracefully.
------------------
"So many Mustangs, so little time..."
ICON Motorsports
[This message has been edited by RB83L69 (edited March 30, 2001).]
Hard to say about your times, I'd guess anywhere from .3 to .5 sec is typical, every car is different.
You'll have to either replace the carrier with a 3-series, in which case the thing to do would be to get one from SLP; or use the special gears; or use a ring gear spacer. I'd recommend option 1 which will give you a posi as well as accomodating the gear change gracefully.
------------------
"So many Mustangs, so little time..."
ICON Motorsports
[This message has been edited by RB83L69 (edited March 30, 2001).]
Member
Joined: May 2000
Posts: 419
Likes: 0
From: Parkersburg, IA, U.S.
Car: Trans Am
Engine: L69
Transmission: T5
Axle/Gears: 3.73
http://www.dalesplace.com/htm/inform...calculator.htm
This is a great place to calculate rpm's...
Kevin
This is a great place to calculate rpm's...
Kevin
Thread
Thread Starter
Forum
Replies
Last Post
1992 Trans Am
Engine/Drivetrain/Suspension Parts for Sale
1
Aug 8, 2015 08:16 PM
