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

3rd gen to 4th gen rear end parts interchange?

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Old Oct 14, 2003 | 12:59 AM
  #1  
89RsPower!'s Avatar
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Joined: Apr 2002
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From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
3rd gen to 4th gen rear end parts interchange?

I'm wondering if i would be able to swap my posi unit and gears into a 4th gen rear from a 95 v6 maro.. my friend is selling me the rear for 20 bucks, but its an open rear. I'd like to swap it in for the disc brakes and so i can run 4th gen rims, so will it swap? i know the axles are different lengths but are they the same spline? if not could i get axles of the proper length if the posi would bolt in but the axles were a diff spline?
Also how would i make the parking brake functional? Thanks for any help!


Thanks for any help!

Last edited by 89RsPower!; Oct 14, 2003 at 01:02 AM.
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Old Oct 14, 2003 | 05:11 AM
  #2  
ede's Avatar
ede
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Joined: Aug 1999
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From: Jackson County
i'd help if you said what you had
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Old Oct 14, 2003 | 06:28 PM
  #3  
89RsPower!'s Avatar
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Joined: Apr 2002
Posts: 3,552
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From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
lol sry i thought it was sorta implied.. didnt realize i didnt even mention it.. 10 bolt posi from my 89
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Old Oct 31, 2003 | 10:58 AM
  #4  
matt shutt's Avatar
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Joined: Oct 2003
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From: norfolk va
Car: 84 T/A
Engine: 355
Transmission: t5
yes the axles are different leghts and they are DIFFERENT SPLINES so you cant swap em out slp sells the zexel posi for about 100 bucks
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Old Oct 31, 2003 | 11:46 AM
  #5  
vjo90RS8's Avatar
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From: San Jose, CA
Car: 2002 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23
mostly all 90 and up cars have 28 spline axles and even some 89s, but youd be real lucky if your axles are 28 spline. I dont think i have seen an 89 on the boards yet with the new axles.
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Old Oct 31, 2003 | 05:26 PM
  #6  
89RsPower!'s Avatar
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Joined: Apr 2002
Posts: 3,552
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From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
the origional rear is ancient history, what the spline count on the axles was is anyones guess
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Old Nov 2, 2003 | 10:33 AM
  #7  
Tonyrodz's Avatar
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From: NJ
Transmission: auto
My 89 Formula had the 28 spline axles.
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