6-speed T56 tranny question.......anyone??

venomblue550

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i have noticed mustang cobra, chevy vetts or camaros, or pontiac trans am or whatever, there are a lots of sports cars out there all uses T56 6-speed tranny, they are all $$$, but are they all the same???? and if NOT...how can you tell the difference, or only the bell housing is different??
 

Cobraken

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Just purchased an '04 Saleen Cobra Speedster (mystchrome).
The 1st 4 tranny gear ratios are the same as my '02 ACR. The Cobra does not have the 3-4 gear skip.
 

Camfab

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Each transmission has its own specific attributes.This tranny is used in F-car applications, Viper, Aston Martin as well as a specific earlier F-car retro application. These transmissions listed above are all similar in that they are for applications where the motor and trans are directly connected via the bellhousing. Most are different in Bellhousing configuration as well as linkage (shifter) placement, and tranny mount location. The Viper, GM and Aston applications use a 26 spline input shaft. The Ford applications use a 10 spline. Gearing for the Mustang trannys is as follows; 2.97, 2.07, 1.43, 1.00, .80, .62 with 3.28 reverse gear. The retro Camaro tranny also shares this gearing. The other trannys have a 2.66, 1.78, 1.30, 1.00, .74, .50, and 2.90 reverse gear. The output shafts vary between 27, 30, and 31 teeth. the Viper has a 30 tooth output shaft. So to answer your question Viper has a specific pattern and dimension that is unique to itself. As for the Corvette, it is essentialy a transaxle type arrangement with a torque tube like the Porsche 928. This tranny will definetely not work with any conventional arrangement. Three transmission variants are available for the Corvette. The standard Corvette tranny, the Z06, and the close ratio box just released by GM for racing. The standard Corvette tranny shares similar Viper tranny gearing at 2.66, 1.78, 1.30, 1.00, .74, .50 and 2.90 reverse gear. The Z06 tranny is a wider ratio tranny to accomodate the larger camshaft in that option package. 2.97, 2.07, 1.43, 1.00, .84, .56 and a 2.90 reverse gear. All of the production trannys, specifically to my knowledge have roller bearings that are caged in plastic. Read OIL COOLERS are a must for any type of road racing. Also some trannys use ATF as a lube and some use synthetic lube this is dependant on the synchro material. Former Corvette owner, used to keep a mongoose for protection, buying a snake this week.
 

SnakeEye

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Armen...interesting info on the T56 trans.
Good luck to you with your Snake purchase.
 

Chuck 98 RT/10

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It has be said that the Viper tranny has some parts beef'd up to handle the torque. Maybe something to it, Viper trannys have a good rep to holding up on 900hp drag Vipers and road course Vipers. But I don't know anything about the other versions of the tranny in Vettes, etc. Do they hold up?
 

Cobraken

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Evidently, Ford has been beefing up the trannys they are buying also. Maybe because the Cobras are now supercharged. My Saleen Cobra & Viper have the following gears in their Trans: 1st= 2.66; 2nd= 1.78; 3rd= 1.30 4th is direct. Only the overdrive gears in 5th & 6th are different.
 
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