well the reason i ask is becuase mine is do for a rebuild and and buddy who works for dogde said he would do it for free. and could get most the parts.

the thing i needed to know is, are all the bearings the same and the syncros. also what about the gears.

i need to know what parts he can get me from the dogde dealer and what parts i will have to provide.

i think i remember reading that the input shaft is bigger on the viper tranny. so that bearing might not work.

but what all is different.

i know i will have to change synros and bearing for sure, but he want know about the gears until he gets in there,

 

Try the "Drivetrain" forum.

 

i always forget about the new forum. sorry.

 

Viper
1 2 66
2 1.78
3 1.30
4 1.00
5 0.74
6 0.50 Rear 3.3 (something like that)

Camaro
1 2.97
2 1.94
3 1.35
4 1.00
5 .84
6. .62
Rear 3.42



i found these doing a search is this true. if it is that means i could get the gears as well and bring the 6th gear ratio more toward stock sence i have the 4.10 gears now. that would help on highway driving.

 

The gear ratios you are quoting for the Camaro are not correct. From 94 and up they are the same as the Viper.

There was a 2.97 1st gear T56 used in the 93 F-Bodys, and also a 3.36 1st gear used that year, but 2nd gear is 2.07 in both of those, 5th is 0.80 and 6th was 0.62

The input shaft of the Viper is larger. The front cover in different incorporating a huge, conventional "pusher" type clutch fork, and the tail housing is longer, with the shifter moved back farther. I was just looking at one last week, sitting next to a 73 Cuda that was getting a V10 install.

About 6 months ago, either Chevy High Performance or one of the similar mags had an article with all the details of the LT1, LS1 and Viper versions of the T56

 

i did some searching and found that the syncros are the same, so he can get me that.

but if the gears are the same (as i diameter) then i guess i could use those gears if i need new ones.

so i take it since the output and input shaft are bigge rthe viper t56 i guess that bearing kit wont work.

 

i just called ddperformance and they said that the gears are the same as well a s the syncros and bearing are alll the same in both trannys. so that answer is everything is the same, for what i need

 

The only real difference is that the parts are a bit stronger in a Viper T56.

 

Sorry to bring this back from the dead, but I was wondering if it would be possible to make sort of a hybrid t-56. Could I use a 93 gearset for 1st 2nd and 3rd, and the 94+ for 4th, 5th and 6th? I think the 3.36 would help quite a bit in our cars. Makes it very similar to a mustang T-5 if I remember correctly. I've always hated 4.10s cause it kills top speed in 4th with stock rev limiter, and 3.73s don't seem like enough off the line.

 

Depends on how much power you have...

I will be changing 5th gear to a 0.80 to get max speed of 155 in 5th gear with a 3.73.

 

Most parts are exactly the same (not different stock/part numbers).

The input and output shafts have more splines and are a bit longer, and the tailshaft housing is longer, but the internals are mostly identical. The Viper still uses the cast-iron 3-4 shift fork (instead of the LS1's aluminum version), but it's a direct replacement. The one real upgrade you can get from the viper T56 is to use the output shaft and have the tailshaft housing machined to fit a larger bearing. Bearing breakage and output shaft breakage is proabably the first thing to go on a 500+hp F-body.

John Donato of Donato Engineering was really the first to pioneer this output-shaft upgrade (he builds up T56 for the Viper LeMans teams and club racers), although D&D Performance followed suit a few months later and this is available from one or two other shops aswell. John can also help you with using the new Viper output shaft (2003+ models use splined press-fit gears on 5th & 6th), VESPA (high-temp) shift pads, or even tapping for an oil cooler. His prices seem comporable to D&D and he's been very receptive to my emails in the past (which is more than I can say for D&D).

 

yes, 5th and 6th gears can be changed independantly of 1 through 4. 4th gear in all T56 I've seen are 1.000 so the only real concern is 123 and 56.

Quote:

I think the 3.36 would help quite a bit in our cars. Makes it very similar to a mustang T-5 if I remember correctly. I've always hated 4.10s cause it kills top speed in 4th with stock rev limiter, and 3.73s don't seem like enough off the line.

I've got an MS Excell file with T56 ratios and input/output spline counts for each application (with engine it was mated to). If you want a copy, just let me know.

T56 was used in:

• 92 to 2002 Viper
• 2003+ Viper (same as above, but with pressed on 5&6)
• 93 F-body (two ratio sets available)
• 94 to 97 F-body (LT1/SBC/BBC Bellhousing, one ratio set)
• 98 to 02 F-body (LS1 bellhousing, same ratios as above)
• 96+ Y-body (transaxle w/ triple-cone syncro on 1st, same ratios)
• 00 Mustang Cobra R
• 03+ Mustang Cobra (supercharged engine)
• 04 Pontiac GTO
• 03 Aston Martin Vanquish (clutchless computer shifting)

There's probably more out there, but this is all I've gathered. Outside of the Vanquish's clutchless shifting, and the Vette's transaxle design, most of the the parts interchange without problems. The exception of course is the bellhousing and input/output shafts. The Ford's kinda get screwed with the input shafts (very low spline count), while the F-bodies have an output shaft upgrade as mentioned previously.

I also have the T56 Service Manual in PDF form, but it's like 25 Mb so I doubt it's email capable.

D&D's site (linked above) also has some good info on it.

 

Here's another good article on T56 build-ups: http://www.chevyhiperformance.com/te...48_0405_trans/

They make some dumb comment on how "Now, 0.80 Fifth and 0.74:1 Sixth gearsets are available" thanks to George Kreppein's influence on Tremec... but the fact remains that it was always available (since the '93 Fbody), just no one used them.

The cool part is that Rockland now makes a 5th and 6th gear that isn't linked together like the standard Tremec piece. Instead of a press-on 5th/6th unit, the gears are totally separate pieces and are anchored on the shaft with splines. Very cool idea if you plan on swapping out 5th/6th.

 

If i need to use the LT1 t56 with the ls1 i only need to change bellhousings? I was under the impresion that i had to change the complete tranny as the complete housing was different... IE from the tranny to bellhousing is different between ls1 and lt1.

 

And what would i need to change my stock 5th gear?