turbolater

Hi,
Will this tranny take the torque of a 1200 HP supercharged LS7 or LSX engine?
Can the T56 be beefed up?
Are there other options (transmissions) available?
Thanks,
Brian.

ramairetransam

iTrader: (18)

http://www.rsgear.com/products/tranzilla.asp

yes , but youd be at the max limit.

Jeremy@RPMTransmissions

iTrader: (12)

That kindof power is beyond the limits of any standard manual transmission. Are your horsepower numbers at the crank or wheels? Even with an aftermarket gearset the heat generated is going to be crazy along with the stress on the case. It is just going to burn the input and cluster gear up every time.

BlackScreaminMachine

iTrader: (17)

I answered in the Newbie section. IMO your looking at automatics and VERY beefed up ones at that. Most who race, race Power Glides, OR some have gotten very modded 6L80e's that I hear are holding together but thats hesay from me.

Jeremy@RPMTransmissions

iTrader: (12)

Very modded 6L80e transmissions don't exist. They are junk. There is no aftermarket support for them. All that is available are a few upgraded clutch packs and some small hard parts. *NO ONE* is keeping these things alive. Please don't steer people looking for high horsepower capable transmissions towards 6L80e's

BlackScreaminMachine

iTrader: (17)

Like said, and I will correct, apparently the 6L80e's I have seen are not staying together at this point, but the tried and true is still the Power Glide (modded to spec), those can take the power.

Nmbr1GMfan

iTrader: (1)

http://libertysgears.com/clutchless.htm

SWeiser31

iTrader: (9)

You could always look into a Lenco. It will handle that power and then some. Plus you can still drive it on the street. Just gotta be willing to cut the car up a little for all the levers.

LS6427

iTrader: (2)

Get a fully built 4L80E......that'll do you pretty good for awhile. Few people around here are over 1,000 RWHP and they are holding up well. Over a year anyway......these are street cars though.....no drag track launches.

.

TDP

iTrader: (23)

A 32-spline conversion coupled with a Viper input shaft, then cryogenic treatment and micropolished gears would get you close. This combo has not been tested to my knowledge, but I don't see why it wouldn't be good for 1000+rw.

thesource

iTrader: (60)

A T56 magnum gear kit might be able to handle it providing you installed a spray nozzle in the case to lubricate the gears under acceleration. It would need to be a lighter chassis.

Jeremy@RPMTransmissions

iTrader: (12)

That combo has been tested more than enough. At that power level shafts aren't going to solve the problem, LS1 input shafts don't break. The input gear on a Viper input shaft isn't any stronger than a stock LS1 input. We have had more than enough T56s with insain horsepower in front of them come into the shop to know that no matter what shafts, surface treatment or snake oil you throw at a T56 1000rwtq is going to burn up the input and cluster or simply strip the gear clean of teeth. You didn't even mention direct input and cluster oiling. That is a must of any high power T56. At the power level in question he needs a built T56 Magnum with input and cluster oiling with a cooler and limit the WOT power pulls.

LS123

iTrader: (11)

I would have to agree with Jeremy. This M12 came out from a certain Vette putting 900 or so at the wheels. This was the result of a 3 gear pull on the highway. He now has TR6060 with good results.

Nmbr1GMfan

iTrader: (1)

How much will a 300m input handle?

Jeremy@RPMTransmissions

iTrader: (12)

No one makes a 300M input for a T56. The G-force gearset is all 9310 material, but there isn't anything in 300M.

thesource

iTrader: (60)

I did a GTO trans a few months ago that looked just like the pics above and it went boom with about 750 lbs of torque.

Mikey 97Z M6

iTrader: (37)

Vehicle weight will play a huge factor in how well any transmission survives.

I'd suggest the OP look into a Liberty or G-force trans if it's going to be a drag car. The extra money you'll invest into the Liberty will far outweigh the headache you would have with trying to get a T56 to last behind that much power.

My .02.

Mike

thesource

iTrader: (60)

Without a doubt. Other things that play a role are the type of clutch, how the engine makes the power not just the total output of the engine, type of rear tire and even the differential gear ratio plays a role.

Nmbr1GMfan

iTrader: (1)

I just had one built, havent used it yet.

Jonathan@Tick

iTrader: (5)

Did one out of an f-body just a month or so ago that came in with a broke input/cluster. Word is the guy already broke the trans again, and I believe it broke the input/cluster again based on the tech call I received about a "gear whine" sound shortly before it did break. The car made right at 700 rwtq and the trans we built for him had cryo and rem treatment....

Did one for a Nova that made over 1000 rwhp once that did the same thing. We've seen it a bunch of times on transmissions we didn't rebuild however...those were just the two that have broken that we did rebuild. I too have never seen a broken f-body or GTO input shaft (seen a few bent GTO and cobras as some wierd result of a broken axle). The teeth of the gear simply can't take it and a viper input is no difference there as has already been mentioned in this thread by Jeremey...

There have been good reports about the fluid pumps spraying the teeth of the input by guys that had failures before the pump....but I haven't seen that first hand.