LT1 rear to LS1 brakes ... possible?

I have the parts for the C5 Vette front brake upgrade and would like to upgrade the rears too.
Other threads have said that the LS1 rears have slightly longer axles (~1/4") and these are required if LS1 rear brakes are to installed on a 1995 housing.
I came across the following at the Moser Engineering website and this seems to say that LT1 and LS1 rears actually have the same length axles.
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A102805
APPLICATION: Fits 1993-newer Camaro and Trans Am W/3-Channel ABS 10 Bolt Chevy rear, 28 spline, 32" long Diag. 235/120

A102806
APPLICATION: Fits 1993-newer Camaro and Trans Am W/4-Channel ABS 10 Bolt Chevy rear 28 spline, 32" Long Diag. 290/147.50
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If they are, then it appears I wouldn't need new axles. Is this true? (I have to draw the line somewhere!!!)

If true, what else is necessary? Calipers, rotors, mounting brackets and cables. All the cables? Would I also need a box full of e-brake parts or would they be part of the caliper package?

I believe what's been written ... that the rear upgrade is not nearly as useful as the fronts. But since I'll be changing hoses and flushing now's the time. However if the cost begins to approach that of the front (axles & hundreds in e-brake parts too) I won't do it. By the way, this will be all new parts.

I've looked online but haven't been able to find a diagram or blow-up of the LS1 rear brake setup.

Nobody knows if the LT1 axle length is the same as the LS1 axle ??

Nobody knows if the e-brake on the LS1 is different than the LT1 ??

Nobody has or has seen a parts diagram or page for LS1 rear brakes ??

No one has put LS1 rear brakes on an LT1 rear end ??

im interested in finding this out too. Like you have i plan to go with a c5 setup up front and want the noraml ls1 brakes in the rear. Lots of stopping power for minimal coin. well when you compare some baer's, wilwood, etc.

Nobody knows if the LT1 axle length is the same as the LS1 axle ??

Maybe their axles are the same, but people that have tried the GM LS1 axles with LT1 brakes had problem with the length. When using stock axles, you must use the same brake hardware that goes with the axle (LT1 or LS1).

Nobody knows if the e-brake on the LS1 is different than the LT1 ??
The E-brakes are completely different.

Nobody has or has seen a parts diagram or page for LS1 rear brakes ??
I've seen one in the parts book. Parts book downloads can be found on the internet.

No one has put LS1 rear brakes on an LT1 rear end ??
Yes, people have. A search should bear that out.

Maybe their axles are the same, but people that have tried the GM LS1 axles with LT1 brakes had problem with the length. When using stock axles, you must use the same brake hardware that goes with the axle (LT1 or LS1).

Moser Axles for an LS1 seem to work fine for both. I had them in my car (02 LS1 rear with LS1 brakes) and swapped the axles into my brothers 96 Trans Am with his LT1 brakes.

I do know that you have to shim an LT1 brake caliper if you run it with LS1 axles since the LS1 axles are probably 2mm or so shorter.

What makes you think its an upgrade?

slomarao:

The only graphic info I've found on the web is the following link ...

"http://www.thirdgen.org/ls1reardisc?s="

It's a page detailing someone putting LS1 rear brakes on a 3rd gen camaro but it does have a photo of the parts involved.

I may not continue on. I had thought LS1 rear rotors were a 1" larger diameter along with a much improved e-brake but checking rotor prices and specs at Summit I find the LS1 rotor is not 1" larger but only 1/2". (also 1/4" thicker) It may not be worth all the extra work just for a better e-brake.

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Zepher:

Thanks for the info ... it sounds as though the only possible problem can be fixed with a shim.

again: Thanks for the useful response.

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