[Z06] Why did GM swap out the T56 for the 6060?
04-08-2008, 02:34 PM
#1
Le Mans Master
Thread Starter
Why did GM swap out the T56 for the 6060?
what exactly is the advantage and why did they change over to the 6060?
the t56 in the Z is lighter and is the same tranny (different casing) used in the gen 3 srt viper with its 525 ft/lbs tq.
if its because the 6060 is smoother, look at all the threads with 08 tranny issues, even in magazine road tests.
not trying to stirr the pot, but what exactly is the superiority of a 6060 over a t56?
the t56 in the Z is lighter and is the same tranny (different casing) used in the gen 3 srt viper with its 525 ft/lbs tq.
if its because the 6060 is smoother, look at all the threads with 08 tranny issues, even in magazine road tests.
not trying to stirr the pot, but what exactly is the superiority of a 6060 over a t56?
04-08-2008, 02:42 PM
#3
Le Mans Master
Thread Starter
less effort: you say you cant feel it.
stronger: why? has anyone ever broken a C6Z t56 while stock? has anyone ever broken a viper t56 with 55 more tq?
im thinking the idea might have been good but the execution didnt pan out
04-08-2008, 02:55 PM
#5
Le Mans Master
I agree. That's the way I understand it. Even the new Vipers use the new model so it must have been a factory upgrade and model change. The 56 isn't even available anymore.
04-08-2008, 04:36 PM
#8
Burning Brakes
Evolution in products from the manufacturer?
I'm sure the 6060's problems will be ironed out over time. Look at how long the T-56 has been around, I'm sure (not knowing) that there were teething issues for that box the first time it was plopped into a high power car.
I'm sure the 6060's problems will be ironed out over time. Look at how long the T-56 has been around, I'm sure (not knowing) that there were teething issues for that box the first time it was plopped into a high power car.
04-08-2008, 05:06 PM
#10
Le Mans Master
Thread Starter
04-08-2008, 05:43 PM
#11
Melting Slicks
That said, I don't find the T56 to be a bother.
04-08-2008, 06:16 PM
#13
Instructor
the 6060 is quite a bit stronger than the T56. The new 600hp Viper has the 6060 as well as some of the other markets high hp cars. Of course it won't matter if you're keeping the car stock, but the 6060 will hold up better than the T56 if you plan on doing significant modification to your Z.
FWIW the 6060 is considerably smoother than the T56 both racing and on the street, and I've had both.
FWIW the 6060 is considerably smoother than the T56 both racing and on the street, and I've had both.
04-08-2008, 06:32 PM
#14
Le Mans Master
The fact of the T-56 no longer beeing in high volume production, superceeded by the 6060, might have something to do with it. This has been covered a few times, before.
04-08-2008, 09:17 PM
#15
Found this release on the web....
So you might be wondering exactly how a Tremec TR-6060 compares with the T56 you know and love. In short, it’s better in just about every way. It can handle more torque thanks to a move from a 10-spline input shaft to a 26-spline unit. Moreover, the new case is stronger, the countershafts are one-piece units, and the gear faces are wider. All these changes add up to much greater strength, which we’ll all appreciate after we start modding these cars. What we noticed while driving the car, however, was its easy, precise shifting despite the factory shifter.
The prime movers in the better shifting are increased synchronizers on all the gears. Where the Terminator T56 had only two synchros on the 1-2 and 3-4 shifts and single synchros on the remaining gears, the TR-6060 offers triple synchros on the 1-2 and 3-4, and dual synchros on all remaining gears, including Reverse. Plus, the synchronizers have been upgraded from a carbon-particle paper to a sintered-bronze material.
Gt500 Transmission Gears
A larger input shaft, beefier gears, more synchronizers, closer gear ratios, and more make this six-speed one that should become a popular aftermarket upgrade.
So this transmission shifts easier, but it also offers a shorter shift throw. “The synchronizer hubs are much narrower, reducing fore and aft shift travel,” Tremec’s Jim Averill explained. “Additionally, the hub system uses three encapsulated ball-and-coil-spring struts that are much more precise than the old-style hoop-and-stamped strut. This also adds to a smoother fore, aft shift
So you might be wondering exactly how a Tremec TR-6060 compares with the T56 you know and love. In short, it’s better in just about every way. It can handle more torque thanks to a move from a 10-spline input shaft to a 26-spline unit. Moreover, the new case is stronger, the countershafts are one-piece units, and the gear faces are wider. All these changes add up to much greater strength, which we’ll all appreciate after we start modding these cars. What we noticed while driving the car, however, was its easy, precise shifting despite the factory shifter.
The prime movers in the better shifting are increased synchronizers on all the gears. Where the Terminator T56 had only two synchros on the 1-2 and 3-4 shifts and single synchros on the remaining gears, the TR-6060 offers triple synchros on the 1-2 and 3-4, and dual synchros on all remaining gears, including Reverse. Plus, the synchronizers have been upgraded from a carbon-particle paper to a sintered-bronze material.
Gt500 Transmission Gears
A larger input shaft, beefier gears, more synchronizers, closer gear ratios, and more make this six-speed one that should become a popular aftermarket upgrade.
So this transmission shifts easier, but it also offers a shorter shift throw. “The synchronizer hubs are much narrower, reducing fore and aft shift travel,” Tremec’s Jim Averill explained. “Additionally, the hub system uses three encapsulated ball-and-coil-spring struts that are much more precise than the old-style hoop-and-stamped strut. This also adds to a smoother fore, aft shift
04-08-2008, 10:22 PM
#16
Burning Brakes
I have had both, and they both worked/and work just fine.
The only thing I noticed is that the 07 Z seemed a little hard to get into 6th gear sometimes, the 08 I notice that when shifting into 6th, you need to go towards the right a little more to place it in gear, it doesn't feel like a straight down shift but just over to the right a hair.
The only thing I noticed is that the 07 Z seemed a little hard to get into 6th gear sometimes, the 08 I notice that when shifting into 6th, you need to go towards the right a little more to place it in gear, it doesn't feel like a straight down shift but just over to the right a hair.
04-08-2008, 10:28 PM
#17
Melting Slicks
The T6060 in my 08 is a little notchy shifting from 1st to 2nd cold but does not grind. It's very smooth when up to normal operating temps. I think the T6060 is a great tranny just needs the bugs worked out. Ahhh growing pains. 
04-09-2008, 02:10 AM
#19
Le Mans Master
Member Since: Dec 2006
Location: Phoenix Arizona
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Found this release on the web....
So you might be wondering exactly how a Tremec TR-6060 compares with the T56 you know and love. In short, it’s better in just about every way. It can handle more torque thanks to a move from a 10-spline input shaft to a 26-spline unit. Moreover, the new case is stronger, the countershafts are one-piece units, and the gear faces are wider. All these changes add up to much greater strength, which we’ll all appreciate after we start modding these cars. What we noticed while driving the car, however, was its easy, precise shifting despite the factory shifter.
The prime movers in the better shifting are increased synchronizers on all the gears. Where the Terminator T56 had only two synchros on the 1-2 and 3-4 shifts and single synchros on the remaining gears, the TR-6060 offers triple synchros on the 1-2 and 3-4, and dual synchros on all remaining gears, including Reverse. Plus, the synchronizers have been upgraded from a carbon-particle paper to a sintered-bronze material.
Gt500 Transmission Gears
A larger input shaft, beefier gears, more synchronizers, closer gear ratios, and more make this six-speed one that should become a popular aftermarket upgrade.
So this transmission shifts easier, but it also offers a shorter shift throw. “The synchronizer hubs are much narrower, reducing fore and aft shift travel,” Tremec’s Jim Averill explained. “Additionally, the hub system uses three encapsulated ball-and-coil-spring struts that are much more precise than the old-style hoop-and-stamped strut. This also adds to a smoother fore, aft shift
So you might be wondering exactly how a Tremec TR-6060 compares with the T56 you know and love. In short, it’s better in just about every way. It can handle more torque thanks to a move from a 10-spline input shaft to a 26-spline unit. Moreover, the new case is stronger, the countershafts are one-piece units, and the gear faces are wider. All these changes add up to much greater strength, which we’ll all appreciate after we start modding these cars. What we noticed while driving the car, however, was its easy, precise shifting despite the factory shifter.
The prime movers in the better shifting are increased synchronizers on all the gears. Where the Terminator T56 had only two synchros on the 1-2 and 3-4 shifts and single synchros on the remaining gears, the TR-6060 offers triple synchros on the 1-2 and 3-4, and dual synchros on all remaining gears, including Reverse. Plus, the synchronizers have been upgraded from a carbon-particle paper to a sintered-bronze material.
Gt500 Transmission Gears
A larger input shaft, beefier gears, more synchronizers, closer gear ratios, and more make this six-speed one that should become a popular aftermarket upgrade.
So this transmission shifts easier, but it also offers a shorter shift throw. “The synchronizer hubs are much narrower, reducing fore and aft shift travel,” Tremec’s Jim Averill explained. “Additionally, the hub system uses three encapsulated ball-and-coil-spring struts that are much more precise than the old-style hoop-and-stamped strut. This also adds to a smoother fore, aft shift
wish i could buy a TR6060 tranny 
04-09-2008, 02:38 AM
#20
I currently own 2 '08 Z06's and 1 '07 Z06.
I can tell you that both of my '08's (6060's) have issues and the '07 doesn't.
I can also tell you that all three of my Z's had stock clutch issues (all replaced now..)
Furthermore, I can also tell you that it's a PITA to hit 3rd under hard acceleration consistently (in any of these cars) and I consider myself a good driver!
I can tell you that both of my '08's (6060's) have issues and the '07 doesn't.
I can also tell you that all three of my Z's had stock clutch issues (all replaced now..)
Furthermore, I can also tell you that it's a PITA to hit 3rd under hard acceleration consistently (in any of these cars) and I consider myself a good driver!