Gforce race T56 tranny
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Joined: May 2005
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From: Millington Illinois
St. Jude Donor '08-'09
Originally Posted by Excidium28
Anybody have any experiance with the Gforce T56 tranny, the one proven to handle 1300hp. Can it handle powershifting fine?
Last edited by 63mako; Sep 30, 2006 at 06:11 PM.
Racer
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From: Baton Rouge La
how much are you planning on throwing at this tranny? I'm sure the g-force can handle power shifts just fine. My stock one handled them untll about 450 at the tires then the syncros went out. If I had carbon blocker rings etc. it would have been fine and is going 1.42s in a 3300lb race weight car with stock internals but is now pro shifted..
But...yes. I'm sure the g-force can handle power shifts just fine.
But...yes. I'm sure the g-force can handle power shifts just fine.
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Is this going to be in the Vette?
Pef427 just installed one of the "Tranzilla's" from Rockland gear behind his 598" motor in his C-3...but he's just now getting it running..so no real data yet.
I have the G-Force GF5R 5 speed behind the 540 in my '67 and I can tell you that it's an incredible trans. I love it!
Plus I can also vouch for G-Force's excellent customer service. They've been about the best aftermarket co I've ever dealt with. And that is saying a lot!
Tell us more about the car....
JIM
Pef427 just installed one of the "Tranzilla's" from Rockland gear behind his 598" motor in his C-3...but he's just now getting it running..so no real data yet.
I have the G-Force GF5R 5 speed behind the 540 in my '67 and I can tell you that it's an incredible trans. I love it!
Plus I can also vouch for G-Force's excellent customer service. They've been about the best aftermarket co I've ever dealt with. And that is saying a lot!
Tell us more about the car....
JIM
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by Excidium28
I'll be turning 1000+whp car weights 3500lbs (572 cbi with pro fogger NOS) 4.56 gears.
I like everything I hear about your set up, except the 4.56 gears. They are going to be too deep for a clutch car with a 572, particularly when you turn that Fogger loose. How about some more details about the car? weight, tire size, what kind of clutch are you going to run?? You can forget about anything less than an adjustable clutch, Centerforce won't do here.
Sounds like a killer set up!!
John
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Originally Posted by 69 N.O.X. RATT
A 572 on nitrous !!! Love it!! You will find lots of useful information around here, Hotrod427 is always good for ton of empirical data.
I like everything I hear about your set up, except the 4.56 gears. They are going to be too deep for a clutch car with a 572, particularly when you turn that Fogger loose. How about some more details about the car? weight, tire size, what kind of clutch are you going to run?? You can forget about anything less than an adjustable clutch, Centerforce won't do here.
Sounds like a killer set up!!
John
I like everything I hear about your set up, except the 4.56 gears. They are going to be too deep for a clutch car with a 572, particularly when you turn that Fogger loose. How about some more details about the car? weight, tire size, what kind of clutch are you going to run?? You can forget about anything less than an adjustable clutch, Centerforce won't do here.
Sounds like a killer set up!!
John
Here's a video of the car with the OG 427.
http://s95.photobucket.com/albums/l1...=corvette3.flv
Last edited by Excidium28; Oct 1, 2006 at 10:38 PM.
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Originally Posted by SuprJames
That's gorgeous. If it weren't for the wheelie bar and slicks you'd never know it was a drag car.
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by Excidium28
Its a 572 dart block, McLean double disk soft self adjustable clutch, bell housing, & flywheel, thats what McLean recommended. Gforce race T56 6spd 2.98 first gear, rated 1200hp. Toms IRS with 4.56 gear and spool, Toms 1480 axle kit, with billet inner and outer axles. Toms offset trailing arms, 350lbs spring and upper control arms, QA1 adj. shocks, convo pro wheels, rear 12x15 with hooser quick time pro 28x1350, 8 point roll bar which I'll probably have to go to 10 point, cause im getting the car to hit 8's no matter what it takes.
Here's a video of the car with the OG 427.
http://s95.photobucket.com/albums/l1...=corvette3.flv
Here's a video of the car with the OG 427.
http://s95.photobucket.com/albums/l1...=corvette3.flv
Have you run nitrous before, how much ?? did you spray the 427?
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From: Reno Nevada
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Originally Posted by 427Hotrod
Is this going to be in the Vette?
Pef427 just installed one of the "Tranzilla's" from Rockland gear behind his 598" motor in his C-3...but he's just now getting it running..so no real data yet.
I have the G-Force GF5R 5 speed behind the 540 in my '67 and I can tell you that it's an incredible trans. I love it!
Pef427 just installed one of the "Tranzilla's" from Rockland gear behind his 598" motor in his C-3...but he's just now getting it running..so no real data yet.
I have the G-Force GF5R 5 speed behind the 540 in my '67 and I can tell you that it's an incredible trans. I love it!
My other question is how do the Lenco's really compare being that they are only mid $8000's
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by gkull
Jim - what is the price of these two trannys? Also what is the weight? The TKO 600 is 105 pounds. It's a robust tranny for us normal users
My other question is how do the Lenco's really compare being that they are only mid $8000's
My other question is how do the Lenco's really compare being that they are only mid $8000's
The Lenco's are also very large in diameter and length (depending on how many gears you stack on) The Lenco street tranny, the ST1200, is a very nifty tranny, much like a Jeffco and a lot smaller than the race only Lenco. I thought about putting one in my 69 when I was going to backhalf it. They are pretty long also, not sure how they would fit in a vette.
You find the big Lenco's in some sportsman stuff, but mostly Pro-mod and the blown Alcohol classes, 3000 + hp stuff.
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Originally Posted by 69 N.O.X. RATT
You needed more spring for the 427; that car bounced like crazy on the launch and shift, you are going to need even more for the 572 or it will be a real PIA to get down the track. With a 2.98 first gear and 4.56 rear gears your over all gear ratio is 13.45; way too much gear. I would not even waste my time trying, we will need to do a little figuring, but something in the 3.36-3.70 rear end would be do-able.
Have you run nitrous before, how much ?? did you spray the 427?
Have you run nitrous before, how much ?? did you spray the 427?
The reason I changed the rear end gear now with the new engine & tranny set up, is cause im shooting for a 14-1 gear ratios, and with the 6th gear being 0.51 I can still cruise on the highway 70mph @ 2200rpm.
I was talkin to GForce and some other performance shops they all recommended 14-1 gear ratio over all for the best results on a 1/4 mile. I know Im gonna have to shift like crazy, but I wanted to stick with a manual tranny.
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by Excidium28
That was a test run to set the car up, the wheelie bars were too low thats why it was bouncing like crazy, the shocks had to be tightened up, and I installed front end limiters now too. That run the car ran 11.08 sec @ 125mph. With 3.73 gear and 5spd Richmond tranny 3.27 first gear.
The reason I changed the rear end gear now with the new engine & tranny set up, is cause im shooting for a 14-1 gear ratios, and with the 6th gear being 0.51 I can still cruise on the highway 70mph @ 2200rpm.
I was talkin to GForce and some other performance shops they all recommended 14-1 gear ratio over all for the best results on a 1/4 mile. I know Im gonna have to shift like crazy, but I wanted to stick with a manual tranny.
The reason I changed the rear end gear now with the new engine & tranny set up, is cause im shooting for a 14-1 gear ratios, and with the 6th gear being 0.51 I can still cruise on the highway 70mph @ 2200rpm.
I was talkin to GForce and some other performance shops they all recommended 14-1 gear ratio over all for the best results on a 1/4 mile. I know Im gonna have to shift like crazy, but I wanted to stick with a manual tranny.
I am not trying to poke holes in your combination, but I can not imagine a 14 to 1 first gear ratio being desirable, particularly with a 572, maybe with a 327, but not a small tire 572. Small tire being less than 31x13.
My 69 had a 620 hp 454 that went 124 mph in the 1/4 with a Richmond 6 speed and 3.70 gears. The first gear ratio was 2.77. I thought it was about pefect and would not have wanted anymore first gear, granted it was more of a street car, but you have a 572......
John
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George....the GF5R's are $5500 with a Long Shifter. The T-56's I've seen are from $5700-$7000 depending on options when you get into the good ones. And even then you get stock 5th and 6th gears usually.
I could use some more first gear in mine, but I don't think I need 14-1. Mine only has 9.97 total and I could use something in the 10.7-11.0 range probably. I spec'd mine when I had a different engine combo and was using shorter slicks. I now use 28" ones and first gear is LOOOONNNGGGGG......
14-1 with a 572 and a bottle ought to be a wild ride!!
Are you planning on using 4th across the line or are you looking to try and use 5th gear? I'm doubting it will hold that much power.
JIM
I could use some more first gear in mine, but I don't think I need 14-1. Mine only has 9.97 total and I could use something in the 10.7-11.0 range probably. I spec'd mine when I had a different engine combo and was using shorter slicks. I now use 28" ones and first gear is LOOOONNNGGGGG......
14-1 with a 572 and a bottle ought to be a wild ride!!
Are you planning on using 4th across the line or are you looking to try and use 5th gear? I'm doubting it will hold that much power.
JIM
