T56 6 speed upgraded to Viper spec. Don't remember the Tq rating off the top of my head, but it's alot. http://www.ddperformance.com/ sells kits in all flavors.
A new Richmond T-10 which is basically an upgraded Muncie handles 300-375 LB Ft of torque depending on the gear ratio. I would think the M-21 would be a the lower end. These have the aluminum case. I just scored a Borg Warner "Power Brute" 4 speed which is a super T-10 with an Nodular iron case and high nickel gears. I have not found the torque specs. , but this is a stout piece.
With a Muncie, you wanna go M-22 Rock Crusher. Its their strongest trans. I used a Richmond 6 speed behind a 500hp BBC. That trans was a pain to shift if you're into drag racing.
1994 Lingenfelter ZR-1: 750hp, 0-60 in 3.2 seconds, stock t-56 transmission. It is my understanding that the T-56 in a Camaro/Firebird is different than the one in a Viper/Corvette. This is all I know about it in the world.
Try to find something out of a late model diesel pickup, the diesels have more torque than any gas engine, think the Cummins in the Dodges run right around 600 ft. lbs.
I know the muncies are rated MUCH lower than what my stock 371 golden rocket puts out, so that puts them out of the loop... besides, they're only four speeds. I like the idea of a T56, but the $$ is not too hot. (Have a line on one for a good deal possibly though). Will look into some diesel trans.
Diesel trucks usually have a big granny gear trans with very wide ratios. Good if you're towing a trailer, strong as hell, but not performance oriented. They hate speed shifting.
Using a Doug Nash 4 + 1 behind my BBC, dynoed out at near as damn it 550lbft and it copes with that without problems. According to DN it is supposed to be safe upto 450lbft but most of the guys I have spoken too seem to think that this is a 'safe' number the actual rating being much higer. In closing, seems fine. Now watch that be the kiss of death...... P.
Love my TKO, would recommend them to others. Be aware the TKO and T56 are big and bulky, especially up high, and to the back. Tunnel will be correspondingly large.
The company I work for makes performance parts for Vipers and we have done cars that put down over 1000 at the wheels with stock T56's and Centerforce clutches. I could supply you with the contact info of a few different companies that deal in used parts if you'd wanna try to track down a used one. PM me if you want the info.
Actually: 1994 Lingenfelter ZR-1: 750hp, 0-60 in 3.2 seconds, stock t-56 transmission. They never installed a T-56 in any Corvette from 1989-1996. It's a German trans, made by ZF Industries. They made two different(technically 4 I suppose if you count the two versions for the ZR-1) versions in that timeframe. The early trans(89-92.5) were rated at 450 ft. lbs, but they growl like an M-22 in first gear. Many customers complained of the sound which prompted GM to change the cut of the gears in the middle of 1992. All subsequent ZF Corvette trans were rated at 400 ft. lbs. The ZR-1 version of this trans had a different input shaft(to accommodate the LT5 engine). That said, the Lingenfelter ZR-1 part was accurate. LPE routinely used stock ZF trans in their 415cid LT5s(700+hp) with little trouble. I've personally seen these transmissions take 5500RPM clutch drops on ET Streets and they keep coming back for more. Very robust piece, for certain A while back, GM was liquidating these transmissions and you could purchase them new, for about $1000. Not bad when you think about that .5 Double Overdrive 6th gear. That puts 80mph at around 2K RPM with 4.10s, depending on tire height. I am unaware if they are still available Regards, KatsAss
Yep, from '89 to '96, all manual Vettes were ZF6s. The earlier version (black tag) is a tad stronger than the blue tag model used from the early 90s on. They both hold up pretty well but are long and rather heavy. They are also pretty noisy when put behind anything other than the expensive dual-mass flywheel that these Vettes came with. But even when running fairly stout engines and drag tires, some Vette guys beat on them pretty hard and don't have a lot of problems.
Just to elaborate. The TKO 600 gives you eight different shifter positions and has a 31 spline output shaft. I'm not sure if all T56s have 27 spline output shafts, but I know that many do. The more splines the better, in my book. Take the difference between 28 and 31 spline ford axles, for example. It is also worth noting that the TKO is a grand or so less than the Viper T56.
This is what I've got in the wagon you sat in: http://www.rsgear.com/GM.htm If nothing else, I'd call them and talk prices. These are the guys I worked with on adapting the Lt1 clutch hydraulics to a different car: www.t56kit.com They rule. Ask for Tyler. To put one of these behind your engine: www.transmissionadapters.com That good deal is the key. ~Scotch~
I'd really LOVE to put that behind the 371. Just waiting to hear back from you know who about it. I'd definitely be sliding him a few bucks for hooking me up of course. Apparently dude *might* fix his camaro, but he might not. If I could pick that up, it'd rule. If not, well, I'll just have to buy one anyhow and prolong the project so that it's what I want since I refuse to compromise or settle for anything short of my dream car. BTW: Thanks again for letting me run the wagon through the gears. That was more fun than anything I've DRIVEN in the last few years as is!!! haha
BTW: Thanks again for letting me run the wagon through the gears. That was more fun than anything I've DRIVEN in the last few years as is!!! haha[/QUOTE] It's actually a driver now. You're welcome to come out and pilot it on the street without having to make "vroom vroom" noises yourself anymore. The 6-speed is fucking sweet. ~Scotch~
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