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

7.5" 28 spline axel fitment??

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Old Jan 1, 2005 | 07:49 PM
  #1  
leeperryracing's Avatar
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From: Denver, CO
Car: cleanest '86 sport coupe around!!
Engine: 355ci twin 66mm turbos on e85
Transmission: built rmvb th400 w/ t-brake
Axle/Gears: 3.23
7.5" 28 spline axel fitment??

will 28splines out of a 7.5" 10bolt 4th gen rear fit a 3rd gen rear of the same size? and yes I know those axels will have to be mated to a 3series carrier.
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Old Jan 1, 2005 | 08:37 PM
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Justins86bird's Avatar
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From: Another world, some other time
Car: 86 LG4 & 92 TBI Firebird
Engine: The Mighty 305!
Transmission: 700R4
Axle/Gears: 3.42
Nope, a 4th gen uses longer axles then a 3rd gen.
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Old Jan 1, 2005 | 10:17 PM
  #3  
leeperryracing's Avatar
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From: Denver, CO
Car: cleanest '86 sport coupe around!!
Engine: 355ci twin 66mm turbos on e85
Transmission: built rmvb th400 w/ t-brake
Axle/Gears: 3.23
thanks Justin, glad i didn't jump ahead and got them.
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Old Jan 1, 2005 | 11:03 PM
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AlkyIROC's Avatar
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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 only production 28 spline axles that will fit into a third gen housing are out of 90-92 f-bodies. Aftermarket 28 spline axles are around $125 each and are much better than factory ones.
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