Aftermarket T-56 Specifications

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Jul 17, 2002 | 09:35 PM

'91 Formula

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Joined: Nov 1999

Posts: 477

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From: Lk. Ronkonkoma, Long Island N.Y., U.S.A.

Car: 1991 Firebird Formula

Engine: 383 Supercharged and Intercooled

Transmission: 6-Speed

Axle/Gears: Stock 10 bolt 3.42

Aftermarket T-56 Specifications

Tag on my t-56 has this part number: 13-86-011

The number is listed under TTC website as 1386-000-011.
This is the same part number as the number on the transmission tag, I called and verified it with Tremec.

http://www.ttcautomotive.com/products/t-56.asp

p/n: 1386-000-011
center distance: 85
weight: 115-129lbs
touque capacity(lbs.ft./Nm): 450/610

1st: 2.97
2nd: 2.07
3rd:1.43
4th: 1.00
5th: 0.8
6th: 0.62
Rev.3.28

I know there has been conflicting reports on TQ capacity and gear ratios out there for the aftermarket T-56. I had to find out what was right.

Last edited by '91 Formula; Jul 17, 2002 at 09:43 PM.

Jul 29, 2002 | 06:31 AM

'91 Formula

Thread Starter

Member

iTrader: (1)

Joined: Nov 1999

Posts: 477

Likes: 3

From: Lk. Ronkonkoma, Long Island N.Y., U.S.A.

Car: 1991 Firebird Formula

Engine: 383 Supercharged and Intercooled

Transmission: 6-Speed

Axle/Gears: Stock 10 bolt 3.42

ttt

Jul 30, 2002 | 08:57 PM

JoelOl75

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Joined: Jan 2001

Posts: 1,978

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From: PA

Car: 88 Firebird WS6

Engine: 350 TPI

Transmission: T56

Axle/Gears: 3.42

Both the 94-97 and the aftermarket t56 and the Richmond R.O.D. 6 speed have a torque capacity of 450 lbs/ft

The aftermarkets, I believe, are available with different ratios. I know the R.O.D has like five or six different choices when it comes to picking your gear spread.