LT-1/LS-1 rear axle swaps
07-02-2005, 11:03 PM
#1
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Join Date: May 2005
Posts: 36
LT-1/LS-1 rear axle swaps
any answers on whether or not an LS-1 rear end and LT-1 rear ends are externally the same and will they interchange. I am wondering because I may try to beef up a 10 bolt to hold up, I know that there are better quality parts than stock that can be used to make it stronger and then I won't have to change everything relating to the axle mounting to put in a 12 bolt. And any opinions or experiences with doing this yourself?
95 Trans AM
M.O.R.E Performance 383, reprogrammed comp
hooker long tube headers, corsa cat back
fidanza alum flywheel, LUK clutch
419 RWHP, 411 RWTQ
95 Trans AM
M.O.R.E Performance 383, reprogrammed comp
hooker long tube headers, corsa cat back
fidanza alum flywheel, LUK clutch
419 RWHP, 411 RWTQ
Last edited by superduty95; 07-03-2005 at 08:15 PM. Reason: added car specs
07-03-2005, 11:07 AM
#2
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Join Date: Dec 1969
Location: Little Rock, AR
Posts: 27,709
Re: LT-1/LS-1 rear axle swaps
It is possible to swap complete rear ends, but you cannot mix axles and brakes between the two. Depending whether the LT1 car has ASR or not, there can be issues with that and ABS.
07-03-2005, 08:14 PM
#4
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Join Date: May 2005
Posts: 36
Re: LT-1/LS-1 rear axle swaps
OK, so what I have is that EXTERNALLY an LT-1 and an LS-1 axle are the same as far as mounting points go.....but the axles are shorter internally? so what I can use is a complete axle assembly but are the internals different? Is the axle diameter bigger/larger spline count, how about bearing size? A better posi unit is a given for either for what I am running. Also planned would be a cast rear end cover with support bolts. Of course I will use the LS-1 brakes or an aftermarket upgrade. What kind of issues can there be with the ABS?
95 Trans AM
M.O.R.E Performance 383, reprogrammed comp
hooker long tube headers, corsa cat back
fidanza alum flywheel, LUK clutch
419 RWHP, 411 RWTQ
95 Trans AM
M.O.R.E Performance 383, reprogrammed comp
hooker long tube headers, corsa cat back
fidanza alum flywheel, LUK clutch
419 RWHP, 411 RWTQ
07-03-2005, 08:38 PM
#5
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Join Date: Oct 2004
Location: Little Rock, AR
Posts: 536
Re: LT-1/LS-1 rear axle swaps
I have a 98 rear in my 94 Z28. If you use the ls1 brakes and emergency brake cables it is a direct swap. If you have abs only you will need an abs only rear to keep your abs. If you have traction control you will need a traction control rear. I think the spline count is the same and the difference in axle length is because of the diffrent brakes.
07-07-2005, 09:52 PM
#6
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Join Date: Jul 2005
Posts: 19
Re: LT-1/LS-1 rear axle swaps
I have a 9" available that came out of a Gen 3 It would bolt up in minutes sway bar and all. Blownpickl@aol.com $750 housing and axles
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