t56 out of a '99 viper
ive had one person say from keisler that the shifter would be to far back and another not even mention that..what do you guys think?
it should would help out the wallet since its a free trans..
thanks!
Some areas to be concern on for swapping:
1) Input shaft needs to be changed to work with the Gen III/IV engine / Clutch setup, it is different size.
2) Bell housing and front adapter plate need to be swap for a GM Gen III/IV engine ones to be able to bolt up to the engine. You can get away with using the Viper Adapter plate, the GM bell housing will both up, but the GM Clutch slave will not bolt up and the Viper one is the wrong size for the GM Clutch.
3) Hyd Clutch Slave needs to swapped over.
4) Shifter location is different as is the shift bolt pattern.
5) VSS is different in both size and type of signal (Hall signal)
I have a thread for what I did..
Input shaft was swapped out, used Viper Adapter plate, use GM bellhousing and mod'd a GM Clutch slave.
I used a slip yoke from a old Dodge Van.
https://ls1tech.com/forums/manual-transmission/503808-t56-gm-viper-throw-out-bearing-slave.html
I believe the F-body viper trans is stronger. They use carbon fiber synchronizers and steel 3-4 shift forks as well as the same 30 spline mainshaft. They have a .80 5th and .62 6th as opposed to a .74 and .50 on the fbody shaft i believe.
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Some areas to be concern on for swapping:
1) Input shaft needs to be changed to work with the Gen III/IV engine / Clutch setup, it is different size.
2) Bell housing and front adapter plate need to be swap for a GM Gen III/IV engine ones to be able to bolt up to the engine. You can get away with using the Viper Adapter plate, the GM bell housing will both up, but the GM Clutch slave will not bolt up and the Viper one is the wrong size for the GM Clutch.
3) Hyd Clutch Slave needs to swapped over.
4) Shifter location is different as is the shift bolt pattern.
5) VSS is different in both size and type of signal (Hall signal)
I have a thread for what I did..
Input shaft was swapped out, used Viper Adapter plate, use GM bellhousing and mod'd a GM Clutch slave.
I used a slip yoke from a old Dodge Van.
https://ls1tech.com/forums/showthread.php?t=503808
I have a viper trans sitting here that I've been debating on converting.
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Edit: This thread may help as well (https://ls1tech.com/forums/showthrea...ght=t-56+viper)
Last edited by pist0lpete; Nov 6, 2008 at 05:30 PM.
Edit: This thread may help as well (https://ls1tech.com/forums/showthrea...ght=t-56+viper)
I believe he meant to say an aftermarket built F-body to viper specs is stronger. A standard F-body does not use a 30 spline and is DEFINITELY not stronger.
The big issue here is that the guy is wanting to save some coin.....swapping all of these parts will definitely not save coin and you can buy a T56 that will work without modification for a lot less.
keisler quoted me 5k for everything including the viper trans....which he was saying it was the only way i could go with an LS2...I think the more I talk to these guys about tremec's I get more confused..lol
thanks guys for the info i figured you guys would know...if you see a viper trans for sale youll know who it came from..lol
keisler quoted me 5k for everything including the viper trans....which he was saying it was the only way i could go with an LS2...I think the more I talk to these guys about tremec's I get more confused..lol
thanks guys for the info i figured you guys would know...if you see a viper trans for sale youll know who it came from..lol
You can have a bulletproof T56 without using viper internals for under $3k. When I say bulletproof, I mean 700 hp so not completely indestructible, but more than what you will probably ever push through it.
my only issue is buying the trans for 2,300 then buying all the other goodies that goes along with a automatic to manual conversion...
do you guys have recomendations on people in the bizz to deal with??
darkhorse performance, amp, keisler and classic 5speed are the only ones i know of.
Edit: This thread may help as well (https://ls1tech.com/forums/showthrea...ght=t-56+viper)
Yeah i meant a Viper spec Fbody trans is stronger than a stock Viper transmission. D&D built mine.
my only issue is buying the trans for 2,300 then buying all the other goodies that goes along with a automatic to manual conversion...
do you guys have recomendations on people in the bizz to deal with??
darkhorse performance, amp, keisler and classic 5speed are the only ones i know of.
If you are keeping it under 500 at the crank, I'd look for a low mileage stocker on e-bay and just use a LS7 clutch.







