Transmissions and Drivetrain Need help with your trans? Problems with your axle?

What posi unit do you recommend!

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Old 06-03-2009, 07:16 AM
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Car: 1988 camaro
Engine: 355 SBC
Transmission: TH400 w/ 3800 stall conv.
Axle/Gears: 3.73
What posi unit do you recommend!

My son and I are building a 1988 Camaro! I built a strong 355 and have a TH400 behind it with a 3400 stall convertor! We are changing to 28 spline axles and will be running 4:10 gears turning M/T DOT Drag radials that are
aprox 28" tall! I have a spool for it, but, he wants to drive it on the street as well! I don't want the spool on the street! Hard on tires and drive line!!!

What have you all been running with good results?

Thank you for looking!
Kevin Baden
http://www.youtube.com/watch?v=aGvxbXYz6bE
Old 06-03-2009, 09:04 AM
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Re: What posi unit do you recommend!

Eaton Posi for street/strip and Truetrac or Zexel for street/road race or auto cross. Need prices?
Old 06-03-2009, 09:13 AM
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Car: 89 Camaro
Engine: 383 w/ 450HP
Transmission: TKO-600
Axle/Gears: 3.42
Re: What posi unit do you recommend!

Is the truetrac better for purely street driving? ive got the govloc now and im tired of it locking sometimes and not locking other times. I know the truetrac is always engaged, would i even tell a difference on pure street driving from a truetrac and a eaton posi is what im trying to say.
Old 06-03-2009, 09:39 AM
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Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Re: What posi unit do you recommend!

This is a GREAT READ.

https://www.thirdgen.org/forums/tran...-question.html
Old 06-03-2009, 11:53 AM
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Re: What posi unit do you recommend!

The Truetrac doesn't always lock up when doing a burnout, but the Eaton will. The Eaton is very smooth if the right oil is used with it. Most people don't have any problems with the Eaton on the street. The Eaton was the OEM limited slip differetnial in all of the Chevy muscle cars from the '60s and early '70s.
Old 06-03-2009, 12:09 PM
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Car: Z/28
Engine: 355
Transmission: Turbo 400
Axle/Gears: 3.73
Re: What posi unit do you recommend!

another source for posi and rear end parts.

www.Tomsdifferentials.com
Old 06-03-2009, 01:50 PM
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Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Re: What posi unit do you recommend!

Answered my own question.

Last edited by I H8 WWD; 06-03-2009 at 02:02 PM. Reason: Answered my question
Old 06-03-2009, 02:03 PM
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Re: What posi unit do you recommend!

For a year-round daily driver that seldom sees the dragstrip, nothing can begin to think about trying to imagine approaching the Auburn, which is why GM installed so many. But if you're going to the dragstrip every week, these guys are correct.
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