T 56 Gear ratios
T 56 Gear ratios
Well since i have heard some bad things about the richmond 5 and 6 speeds in my last post i guess im on to another tranny. As i was flipping through an old hot road magazine i saw a 5/16 inch adapter plate that goes on the t56 six speed. it allows you to use your stock bellhousing clutch driveshaft unlike spohns. they only thing you need is a crossmember. so im thinking about getting that and a t56. The thing is i would like to have the ones with only 1 overdrive. which years had these? how strong are they? what are there gear ratios 1-6? Or should i just get the 500ftlb torque tremec?
Supreme Member
Joined: Mar 2001
Posts: 2,047
Likes: 0
From: The State of Hockey
Car: 1987 Trans Am GTA
Engine: Miniram'd 383, 24X LS1 PCM
Transmission: TH700R4, 4200 stall
Axle/Gears: 9", 4.33:1
Not sure if this is what you are looking for, but the T56s in the 4th gen F-bodies all have two overdrives but the 93 ones have less overdriven 5th and 6th gears versus the 94-up ones. The 93 model ones are only rated at 400 ft-lbs versus 450ft-lbs for the 94-up gearboxes.
The ratios for the 93 trans are:
First 2.97:1
Second 2.07:1
Third 1.43:1
Forth 1.00:1
Fifth 0.80:1
Sixth 0.62:1
Reverse 3.28:1
For the 94-up ones:
First 2.66:1
Second 1.78:1
Third 1.30:1
Fourth 1.00:1
Fifth 0.74:1
Sixth 0.50:1
Reverse 3.28:1
Keep in mind that the 98-up LS1 T56s will not work on a SBC.
The ratios for the 93 trans are:
First 2.97:1
Second 2.07:1
Third 1.43:1
Forth 1.00:1
Fifth 0.80:1
Sixth 0.62:1
Reverse 3.28:1
For the 94-up ones:
First 2.66:1
Second 1.78:1
Third 1.30:1
Fourth 1.00:1
Fifth 0.74:1
Sixth 0.50:1
Reverse 3.28:1
Keep in mind that the 98-up LS1 T56s will not work on a SBC.
Supreme Member



Joined: Mar 2001
Posts: 3,306
Likes: 78
From: Fl
Car: 5.3L turbo 2800lbs RWD
Engine: Prefer 3L Iron & 5.3L Aluminum
Transmission: 4l80e
Axle/Gears: 3.512
<b>Sixth 0.50:1
</b>
thats just sick. I mean, even with 4.11:1 rear gearing, thats still only 2..06 Final gearing. its like having a TH350 with 2.06 rear gear. its better than a 700R4 with 2.77 gearing. its insane, and i want one.
</b>
thats just sick. I mean, even with 4.11:1 rear gearing, thats still only 2..06 Final gearing. its like having a TH350 with 2.06 rear gear. its better than a 700R4 with 2.77 gearing. its insane, and i want one.
Junior Member
Joined: May 2002
Posts: 61
Likes: 0
From: Courtenay, B.C.
Car: 91 RS
Engine: 350 TBI
Transmission: 5 speed
Originally posted by Kingtal0n
thats just sick. I mean, even with 4.11:1 rear gearing, thats still only 2..06 Final gearing. its like having a TH350 with 2.06 rear gear. its better than a 700R4 with 2.77 gearing. its insane, and i want one.
thats just sick. I mean, even with 4.11:1 rear gearing, thats still only 2..06 Final gearing. its like having a TH350 with 2.06 rear gear. its better than a 700R4 with 2.77 gearing. its insane, and i want one.
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
Here are the specs for my T-56. Used my stock bellhousing. Infact I now use a Lakwood scattershield. Bought Spohn TA and a custom DS.
https://www.thirdgen.org/techbb2/sho...hreadid=119968
https://www.thirdgen.org/techbb2/sho...hreadid=119968
Last edited by '91 Formula; Dec 19, 2002 at 06:47 AM.
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Member

Joined: Mar 2000
Posts: 492
Likes: 0
From: Moncks Corner
Car: 89 Iroc Z Cnvertible
Engine: 409 SR
Transmission: 6 speed
Originally posted by Kingtal0n
<b>Sixth 0.50:1
</b>
thats just sick. I mean, even with 4.11:1 rear gearing, thats still only 2..06 Final gearing. its like having a TH350 with 2.06 rear gear. its better than a 700R4 with 2.77 gearing. its insane, and i want one.
<b>Sixth 0.50:1
</b>
thats just sick. I mean, even with 4.11:1 rear gearing, thats still only 2..06 Final gearing. its like having a TH350 with 2.06 rear gear. its better than a 700R4 with 2.77 gearing. its insane, and i want one.
Originally posted by Kingtal0n
[B its insane, and i want one. [/B]
[B its insane, and i want one. [/B]
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