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

28spline rear question

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Old Dec 4, 2000 | 11:41 AM
  #1  
theformula's Avatar
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28spline rear question

I have a rear at home with only one axle.
Its a 3:42 with posi and one 28spline axle. The other one cracked in half.
And.....I have the driverside 28spline axle. Would I need to buy the passenger side replacement. Or could I find another 28spline drivers side. In other words are they interchangeable or designated for a certain side?

and.....I was wondering ....could I use just the housing from an old 26spline rear I have sitting at home for this project?


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92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,K&N, Crane AFPR (47psi),MSD6AL, MSD wires, AC DELCO cap/rotor/plugs, Bosch O2sensor, 3:73s,JET fan switch, Macewen white face gauges, Intellitronix Digital Gauges
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Old Dec 4, 2000 | 01:44 PM
  #2  
Kevin91Z's Avatar
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Yes, the housings are the same, just the internals are different, among thirdgen 10-bolts.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
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Old Dec 4, 2000 | 01:58 PM
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TomP's Avatar
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From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
I believe the axleshafts are interchangeable per sides; when I had mine out to change my bearings & seals (routine overhaul) I don't remember seeing any difference between the driver's side or passenger side.

There might've been a difference overall between the wheel flange of rear-disk-brake axleshafts and rear-drum-brake axleshafts. I think one flange (where the lug bolts are) was thicker than the other... if that matters for your applications.


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Old Dec 4, 2000 | 03:49 PM
  #4  
theformula's Avatar
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OK cool. I just bought a 28spline axle for $30shipped from a guy I know. Do you think the carrier and gears will fit in the 26spline housing?

Arent the axle housings a different shape?

------------------
92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,K&N, Crane AFPR (47psi),MSD6AL, MSD wires, AC DELCO cap/rotor/plugs, Bosch O2sensor, 3:73s,JET fan switch, Macewen white face gauges, Intellitronix Digital Gauges
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Old Dec 4, 2000 | 11:12 PM
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
The axles are the same length on each side. A 28 spline carrier will fit in a 26 spline housing.

I almost used my 26 spline carrier when I went to 28 splines. I had the 28 spline side gears but found the hole in the carrier for the 28 spline axles was just a little to small. I drilled it out to 1 1/4" for it to work then found a 28 spline carrier the next day.

Aftermarket 28 spline axles (better than stock axles) for third gen can be found at www.drivetraindirect.com part #KAC7-A7 for $125 each.

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