Tremec T-56 versions

I was looking at Tremec's web site and came across this version of the T-56.
PN: AA08-000-013
Center Distance: 85mm
Weight: 139/63 lbs/kg
Torque Capacity: 650/881 lbs.ft./Nm
GVW/GCW 4,000/1,814 lbs./kg.
Gear Ratios
1st 2.29
2nd 1.61
3rd 1.22
4th 1.00
5th 0.85
6th 0.75
Rev 3.15

Notice the torque capacity! The gear ratios are different, but other than that does anyone know what the other differences are compared to our tranny? Any way this (or the parts) could be adapted? I emailed Tremec, but the chance of getting a coherent answer from a big corporation seem slim.

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

Keep this one up...I think you might be on to something, Rich! I would be interested!


Ryan

<font face="Verdana, Arial" size="2">Originally posted by 96-speed:
Keep this one up...I think you might be on to something, Rich! I would be interested!

Ryan</font>

Ryan: I am gonna make a good effort to find this out. If it can be adapted this would be a really good thing!

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

Hmm...

we are setting out on a simular project here. The new cobra has more desirable OD ratios then our trans. Seeing how the OD section in pretty much seperate We are going to try and purchase all the OD parts from Ford and see if we can slip then into a 01 Bird for Silver State Challenge racing http://web.camaross.com/bb/wink.gif

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Ellis
Team Captain
Team North West F-Body
www.teamnwfbody.org (http://www.teamnwfbody.org)

OneFlyn95z28, if you're looking for a 0.80:1 5th gear set and 0.62:1 6th, (same as the '03 Cobra) you have no farther to look than the "G92" 1993 T56, which has the following ratios...

1st - 2.97
2nd - 2.02
3rd - 1.43
4th - 1.00
5th - 0.80
6th - 0.62

I too am interested in "swapping gears" in a T56, since my application is somewhat special and with the lack of aftermarket gear sets for my differential, I'm limited to the 4.10 I already have or the 3.90:1 which came in the automatic cars, unless I want to spend a bundle having one made. With a 556 lb-ft. 396 and a 2.97:1 first gear, that's a little much for a P285 street tire. http://web.camaross.com/bb/smile.gif

Advice so far has been to start in second gear, which would drop final drive to 8.07:1 instead of the 11.58:1 (G92 T56, 3.90 diff) of first gear, but being able to take the 2.29 1st gear from the Tremec Rich listed would give me a more ideal 8.93:1 (3.90 diff) first gear and save me from losing a gear.

If I could have a T56 case assembled with the following gear ratios, I'd be happy. http://web.camaross.com/bb/smile.gif

1st - 2.29
2nd - 1.61
3rd - 1.22
4th - 1.00
5th - 0.80 or 0.74
6th - 0.62 or 0.56

I assume that the improved torque rating of the 2.29 Tremec is directly related to the first gear ratio, since the 3.36:1 '93 transmission was only rated at 350 lb-ft., the 2.97:1 G92 '93 was rated at 400, and the now standard 2.66:1 is rated at 450. It would be nice to be able to mix and match gear sets, assuming the case dimensions aren't altered, and wind up with a more ideal set of gear ratios.

D&D Performance might be the first place to start, since they can build T56s to order, I believe.

<font face="Verdana, Arial" size="2">Originally posted by jimlab:

SNIP
D&D Performance might be the first place to start, since they can build T56s to order, I believe.</font>

Jim: do you have contact info. for D+D?

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

D&D Performance
(248) 926-6220
http://ddperformance.com/index2.htm

Mark Montalvo recommended them to me.

Well, here's the word on the 650ft-lb Tremec T-56.

"This particular model was developed and assembled (per order) in very low volumes for the Viper racing program. It has a considerable number of non-production components that will require a considerable lead time (and expense) for the order. The input configuration (clutch housing, input shaft, bearing cap, clutch release) are different and would have to be modified to work in the Camaro application. With further interest and review it may be possible to swap these components to make the job easier. I’ve been told these units will sell for approximately $25,000 due to their limited nature and special components. If you are still interested in this model rather than one of the standard production models, let me know and I will put you in contact with our aftermarket sales manager."

I guess if I really have to "upgrade" it will be to a TH400.

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

http://web.camaross.com/bb/eek.gif http://web.camaross.com/bb/eek.gif http://web.camaross.com/bb/eek.gif http://web.camaross.com/bb/eek.gif http://web.camaross.com/bb/eek.gif

$25k eh? That seems mighty ridiculous.... I'd think they could Custom machine each peice out of Titanium and come in under that budget..... http://web.camaross.com/bb/rolleyes.gif

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Kurtis Tamez
LT4-396.com (http://www.lt4-396.com)
97 Z28 LT4-396
94 Firehawk LT1-396
Team NW F-Body (http://www.teamnwfbody.org)

Rich,

Is you main concern the T56 output shaft problem or are you having other failures in your T56 as well? I still have my broken output shaft sitting on the bench and I threatened to do a shaft design to beef up the output splines. The design is no problem. Finding a machine shop to grind all of the bearing surfaces and broach all of the splines is the deal. Also Material selection and the heat treat process is critical. Maybe Tremec would be kind enough to E-mail a DXF file of the stock output shaft. HAAAAA! I haven't totaly given up on this up yet, probably because I haven't broken my second output shaft yet. I'm kinda in the same boat as you. I really don't want to do the TH400 thing.

Regards,
Steve

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94 Formula M6 4.10 Strange 12 bolt Spohn Subs,LCA,LCA Brackets, & PHR,Moroso Cold Air, B&M Ripper w/ T handle/w switch , Hurst Line Loc,ET Streets, FLP's with B&B Triflow's, Taylor Wires
Street Twin, Spool
CC306, R lifters, Pro Mag 1.6's
Cloyes Double
Protune by me (Protune?)

3710# Pig Fat Race Weight
335 RWHP best 60' - 1.76
Best 1/8 - 8.05 @ 86.5
No 1/4 times yet

<font face="Verdana, Arial" size="2">Originally posted by SABLT194:
Rich,

Is you main concern the T56 output shaft problem or are you having other failures in your T56 as well? I still have my broken output shaft sitting on the bench and I threatened to do a shaft design to beef up the output splines. The design is no problem. Finding a machine shop to grind all of the bearing surfaces and broach all of the splines is the deal. Also Material selection and the heat treat process is critical. Maybe Tremec would be kind enough to E-mail a DXF file of the stock output shaft. HAAAAA! I haven't totaly given up on this up yet, probably because I haven't broken my second output shaft yet. I'm kinda in the same boat as you. I really don't want to do the TH400 thing.

Regards,
Steve

</font>

Steve: mine is good, so far. But a friend (with less weight and less power) also broke his and I am thinking of ways to avoid the problem. I am personally not very familair with transmission internals. You obviously are. Are you conversant enough with this stuff to be able to talk to Tremec and see if just the output shaft in the PN: AA08-000-013 would fit our transmission? The person at Tremec who answered my question was Steve Cochran at scochran@ttcautomotive.com.

I really don't want an automatic or to give up my 0.50 sixth gear.

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

Rich, call up D&D. We just had them rebuild a customers tranny here with some upgraded parts. D&D also offers cryo treatment for the gears. Before I gave up on T56s I would contact them and try one of their upgraded rebuilds.

Jason

<font face="Verdana, Arial" size="2">Originally posted by Jason Short:
Rich, call up D&D. We just had them rebuild a customers tranny here with some upgraded parts. D&D also offers cryo treatment for the gears. Before I gave up on T56s I would contact them and try one of their upgraded rebuilds.

Jason</font>

Jason: thanks for the tip http://web.camaross.com/bb/smile.gif

Rich Krause


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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

Why limit yourself to just a tremec.... I would think that liberty, g force or the likes could help you out.. Maybe even take a richmond 6 speed and beef the pee out of it. Then you could even have a scatter shield under the car. You would have to make up some hydraulics but wouldnt think that would be a major cost at all.

Steven

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383 Inches of stroked turbocharged fun.
If one is good shouldnt 2 be great????? :D:D:D
TURBO=TORQUE
TORQUE=FUN
Ask me about Burhead Headers If you are gonna use them
My Car (http://groups.msn.com/Zturbo)

<font face="Verdana, Arial" size="2">Originally posted by zturbo:
Why limit yourself to just a tremec.... I would think that liberty, g force or the likes could help you out.. Maybe even take a richmond 6 speed and beef the pee out of it. Then you could even have a scatter shield under the car. You would have to make up some hydraulics but wouldnt think that would be a major cost at all.

Steven

</font>

I'm thinking because he wants to keep the nice .5 6th gear overdrive of the T56. The OD on the Richmond is only like a .75 and I doubt its much stronger anyways (based on its rated TQ numbers).



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Jason
93 TA, M6

Anybody know anything about the 6-speed that GM uses behind the 8.1L Vortec V8 (340hp/455ft-lb) and 6.6L Duramax diesel V8 (300hp/520ft-lb) engines in the Sierra and Silverado? It is described as a "ZF S6-650".

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Fred
94 Formula A3: 381/TH400/N2O

Advanced Tech Posting Guidelines (http://web.camaross.com/cgi-bin/ubbmisc.cgi?action=getannounce&ForumNumber=30)
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11.513@115.59 on motor; 11.162@127.67, 1.643 60' on a 125-shot. Going with a 275-shot this year

Jimlab-
More gear you will find helps you actually. if you try to tone down first with less gear(or start in 2nd) you will find that you will have to slip the clutch more, etc.


by having more gear, you can slip the clutch less, and/or launch(of racing) at a lower RPM.

4.10s and my 401ci motor was great.. even on street tires, I woulda switched to 4.56s if it weren't for the need to trap 140+ in 4th!

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-94 Black T-Topped Z28 M6, 10s, and daily driven!
-96 CBR F3, modded of course
-92 Talon Tsi AWD, also too many mods..
-99 Tony Kart :)
http://www.fastblackcar.com

Anybody know anything about the 6-speed that GM uses behind the 8.1L Vortec V8 (340hp/455ft-lb) and 6.6L Duramax diesel V8 (300hp/520ft-lb) engines in the Sierra and Silverado?

Info found by searching the Internet:

It's a medium duty transmission. In contrast, the T-56 is a light duty transmission.

It was described as being able to easily handle the output of the high power/torque requirements of the new GM motors, and will be used in the medium duty truck line (Siverado is a light duty truck)

Gear ratios are:
5.79 3.30 2.10 1.31 1.00 0.72

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Hear LT1 cam WAVs, DIY head porting: members.cox.net/gmarengo (http://members.cox.net/gmarengo)

'95, !CAGS, CAI, ForceII, Hooker Shorties, 14.2@103

Killer first gear..... http://web.camaross.com/bb/biggrin.gif.

It's available on the Silverado 2500HD w/ 8.1L V8 or 6.6L diesel V8. These also come standard with 4.10 gears.... hmmm 23.7:1 overall.

Oh well, back to the drawing board.

<font face="Verdana, Arial" size="2">Originally posted by JordonMusser:
4.10s and my 401ci motor was great.. even on street tires, I woulda switched to 4.56s if it weren't for the need to trap 140+ in 4th!</font>I'm sure it is in the upper gears, Jordon, but I've got a ~2,700 lb. skateboard with a 2.97 1st gear (to your 2.66) and 550+ lb-ft. of torque. Since it wasn't built for drag racing, 1st gear is only going to be a tire shredder with anything but the most careful use of the throttle.

The car should have more than enough torque (quite a bit more at idle than the stock engine had even at peak) to start out in 2nd gear "normally". At 8.49:1 final drive (2.07:1), second gear is actually shorter than the McLaren F1's first gear final drive (7.65:1; 3.23 first gear, 2.37 differential), and my car is a hair lighter. http://web.camaross.com/bb/smile.gif

<font face="Verdana, Arial" size="2">Originally posted by JordonMusser:
4.10s and my 401ci motor was great.. even on street tires, I woulda switched to 4.56s if it weren't for the need to trap 140+ in 4th!

</font>

Mind telling me how you trap 140+ in 4th with 4.10s? http://web.camaross.com/bb/wink.gif

<font face="Verdana, Arial" size="2">Originally posted by kmook:
Mind telling me how you trap 140+ in 4th with 4.10s? http://web.camaross.com/bb/wink.gif</font>

A solid roller motor turning ~7,000rpm helps a bit. However that still leaves him a bit short so I suspect he's running a taller than stock tire. I bet a 28" ET street would get ya pretty close at 140mph@7k rpm.



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Jason
93 TA, M6

I'll go out on a limb and state that I think that Jordon meant to say "130+". In the two drag racing videos he used to have on his web site, his trap speeds were in the low 130s. http://web.camaross.com/bb/smile.gif

We don't have any of the big ZF trannies around work (at least not the last time that I checked), but we do have the NVG counterpart, the 5600. It's an iron case 6sp that weighs about 360 lbs (~200 more than the T56), and is about the size of a SBC block. There's no way it'd ever fit in a passenger car without huge amounts of floorpan work.

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1996 Impala SS - LT4 396, T56
1996 GMC K2500
1992 Buick Roadmaster Estate Wagon

<font face="Verdana, Arial" size="2">Originally posted by jimlab:
I'll go out on a limb and state that I think that Jordon meant to say "130+". In the two drag racing videos he used to have on his web site, his trap speeds were in the low 130s. http://web.camaross.com/bb/smile.gif</font>

I think he meant 140s. Nitrous is a nasty thing on a 130 mph NA motor. http://web.camaross.com/bb/biggrin.gif

I've also had a great experience with D&D when I blew my countershaft in my T-5 with the Mustang. Ford wanted around $300 for their countershaft. D&D wanted $179 for theirs http://web.camaross.com/bb/biggrin.gif

Mike

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<font face="Verdana, Arial" size="2">Originally posted by Green 96 T/A:
You guys make me laugh. How old are you all? Mike doesnt have any feelings. Calling him names will affect him about as much as running shoes would for a paraplegic's 100yd dash times... Know what I mean?</font>

1994 Sunset Orange Metallic Camaro Z28 Convertible - The Gorgeous and Sadistic Bitch Who Mistreats You and Lets You Down, Yet You Still Keep Her (http://personal.msy.bellsouth.net/msy/k/r/kraest/camaro.htm)


1989 Red Ford Mustang LX 5.0 Convertible - The Dependable Girl Who Treats You Right, Yet Your Mind Wanders Elsewhere (http://personal.msy.bellsouth.net/msy/k/r/kraest/mustang.htm)