help choosing and redoing a rear end
03-07-2011, 11:57 AM
#1
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Car: 1990 RS Camaro
Engine: 400 sbc throttle body
Transmission: world class t5 manual
Axle/Gears: 3.73's, Detroit TrueTrac
help choosing and redoing a rear end
Hi, i went to the junk yard last Saturday and pulled a posi rear end out of an 82 rs (i think) camaro. and i took the cover off when i got home and found the gearing to be a 3.23? never herd of it before. and i checked how well the posi worked and it was really tight. but i want to put 3.73 gears in it. is that a good choice? and it had a disc brake set up as well so some one has be into that rear end before.
03-07-2011, 12:01 PM
#2
Re: help choosing and redoing a rear end
Hi, i went to the junk yard last Saturday and pulled a posi rear end out of an 82 rs (i think) camaro. and i took the cover off when i got home and found the gearing to be a 3.23? never herd of it before. and i checked how well the posi worked and it was really tight. ....and it had a disc brake set up as well so some one has be into that rear end before.
https://www.thirdgen.org/forums/tran...-10-bolts.html
JamesC
03-07-2011, 07:44 PM
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Car: 1990 RS Camaro
Engine: 400 sbc throttle body
Transmission: world class t5 manual
Axle/Gears: 3.73's, Detroit TrueTrac
Re: help choosing and redoing a rear end
wow thanks for the info thats perfect. does any one have a preference on what kind of gears i should put in? and if thats a good rear end?
03-07-2011, 08:29 PM
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Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: help choosing and redoing a rear end
What does your car have in it right now? Chances are you will be stepping up already with the 2.23 gears. It should make a noticable difference while still giving you decent MPG.
03-08-2011, 09:53 AM
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Car: 1990 RS Camaro
Engine: 400 sbc throttle body
Transmission: world class t5 manual
Axle/Gears: 3.73's, Detroit TrueTrac
Re: help choosing and redoing a rear end
i think i still have the stock 2.73's or something around there. ya i want it to be really quick off the line so i was thinking the 3.73's will be a little better
03-08-2011, 12:37 PM
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Car: 1986 Z28
Engine: 355 crate motor
Transmission: Turbo 350, with B&M Mega shifter
Axle/Gears: stock axles and 273 gears..... grrr
Re: help choosing and redoing a rear end
i want the same thing... I have the stock .273 gears with a 400 horse crate motor under the hood, i need more bottom end power...
03-08-2011, 07:24 PM
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Car: 1990 RS Camaro
Engine: 400 sbc throttle body
Transmission: world class t5 manual
Axle/Gears: 3.73's, Detroit TrueTrac
Re: help choosing and redoing a rear end
ya i know what you mean. i think some new gears will make me a little quicker off the start so i can beat those gay ricers.
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03-08-2011, 10:15 PM
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Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: help choosing and redoing a rear end
From what I have read over the last few years here on this site the two most sought after combinations when referring to the stock 305 ,"auto".with street tires is the 28 spline Eaton Posi.with 3.42 gears and support cover. (Thats the one I have)The second one for the stock,305,"manual" trans.with street tires is the 28 spline Eaton Posi.with 3.73 gears and support cover. If you are pushing a lot of power/torque and want to run slicks at the track than the 10 bolt would not be a good chose because they don't tend to handle the pressure put on them . A 12 bolt or 9” would be the way to go.
Last edited by Ron U.S.M.C.; 03-08-2011 at 10:20 PM.
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