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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> T56 2nd gear, not in this world....
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Topic Review (Newest First)
09-28-2012 08:08 AM
AutoGear Depends on how tall the tire is.

You'll have a pretty awesome launch in 1st gear but Im going to give you a word of caution. Im not trying to be gloom and doom but; if you have the gearbox out of the car, look for the tag on the transmission. It will have a lot of useless numbers but it will ALSO say something like '1386-017' The 3 digits after 1386 (which means Warner Gear T56) is the specific build designator. If you look in the PDF file I posted, in the beginning there is an are that lists assemblies. In the column all the way to the right you'll see that 'tag number' (1386-017 for example) and you'll see the ratios for that particular gearbox on the left. If you have the 3.36:1 1st gear, you can get an awesome launch, but the 3.36 stuff is not nearly as strong as the 2.66 stuff. You have a lot of torque multiplication with that 4.11:1 rear and an input and 1st gear that are rare and soon to be discontinued by the OEM. You can break this stuff if you're too rough.

If you are the one doing the assembly, Tremec has a good manual on their website, and even explains how to use common tools to do most of the job. Its an end loaded case, like an automatic, so some special tools may be required. The GM parts list identifies a lot of parts incorrectly, feel free to use our breakdown. If you have any questions about identifying anything, just ask. PS: Dave Guffey at RPM is one of the best builders in the country. They do stuff for Lingenfelter and Katech.
09-28-2012 06:52 AM
Originally Posted by AutoGear View Post
Found one!
RPM Transmissions in Indiana. 800-406-1109, ask for Jeremy, tell him Nate from Auto Gear sent you. No idea on price.
Thanks a lot Nate! Jeremy is probably pakaging that damn gear for me right now. And thanks for the info also. So, I guess whit a 4.11 diff and this gearbox I better get 7000 RPM from this 454, right?

Thanks again, youre the one!
09-27-2012 08:36 AM
AutoGear Found one!
RPM Transmissions in Indiana. 800-406-1109, ask for Jeremy, tell him Nate from Auto Gear sent you. No idea on price.
09-27-2012 08:15 AM
AutoGear Ok you have the loverly 3.36 or 2.97 low gear T56. They only made that in '93 and '94. Its really uncommon to find one these days. Here's why you're having trouble. Tremec closed their warehouse in TN about 2yrs ago. As a Tremec distributor, I have to get my parts factory-direct from Mexico. This means deliveries usually take 30-45 days from start to finish. Your 2nd problem is that this particular gearbox is well over 10yrs old. When these models are no longer being used in new car production; they take a backseat when it comes to production schedules. So Tremec may make that 2nd gear once a year for example.

I sold the last one I had about a week ago. PM me and I can put you on a back order list, but it might be 3 months or more before I have it.

group A, number 28 in the above diagram. You can't change the ratio's in this trans easily either. You have an oddball, 2nd and 3rd gear and an LT1 length input, you could probably use it as a core towards a new T56 from Tick, RPM Transmissions, The GearBox, Finishline Trans and a long list of others.

I'll make a couple calls and see if I can dig one up, but its not gonna be cheap, my retail on a brand new one would have been $210
09-27-2012 07:14 AM
OneMoreTime There are some trans guys here..Patience and they may show..

09-27-2012 07:11 AM
south65ss Need one either new or used. Nobody?
09-26-2012 04:02 PM
T56 2nd gear, not in this world....

Hi to all. I m experiencing some kind of nightmare here for quite some time. I bought a `94 F body T56 6 speed trans to put behind a 454 on a 71 Ponttiac LeMans. First trip around the block was enough to discover that the trans wasn`t in good shape: you had to be Godzilla to shift from 2nd to 3rd and if you happen to make it the shifter inmediately went back to neutral. So, took the trans off the car and dismantled it. All syncros, fork pads and so on where junk and the 2nd gear had (please excuse my poor description, I don`t know the name of those teeth) only 10 out of 32 teeth. Not the gear teeth, the locking theet. The 3rd gear was just fine. The split problem was due to worn out fork pads. Now here comes the big problem: no one seems to have a 41 teeth 2nd gear for a F body T56!!! And I mean not even Tremec. I have checked with every single store I could find on line and the answer is always the same. Do anybody here know where can I find one? Please?

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