How to select propper transmission gearing for a car

I figured that the car isn't going together for a while and the trans is out- So if its a worthwhile investment, maybe regear it.

I really just want to tear into that thing and get some expierence with it, I have very very limited drivetrain expierence. I'd like to have a cause for diving in though :D



I'm all ears:)

Just swap it.
and dont let any one tell you that transmission are all the same except for th700R4.
I got this from thirdgen.org.

Transmission Engine code 1st 2nd 3rd 4th 5th
1982 TH-200C All 2.74 1.57 1.00
1982 4-sp Muncie LQ8/LQ9 3.50 2.48 1.66 1.00
LC1 3.60 2.48 1.66 1.00
LG4 3.42 2.28 1.45 1.00
LU5 2.88 1.91 1.33 1.00

1983 TH-200C LQ8/LQ9 2.74 1.57 1.00
LC1 2.74 1.57 1.00
1983 TH-700R4 All 3.06 1.63 1.00 .70
1983 4-sp Muncie LQ8/LQ9 3.50 2.48 1.66 1.00
1983 5-sp Warner Gear LQ8/LQ9 3.50 2.14 1.36 1.00 .73
LC1 3.50 2.14 1.36 1.00 .73
LG4 2.95 1.94 1.34 1.00 .73

1984 TH-700R4 LQ9 3.06 1.63 1.00 .70
LC1 3.06 1.63 1.00 .70
LG4 3.06 1.63 1.00 .70
L69-HO 3.06 1.63 1.00 .70

1984 4-sp Muncie LQ9 3.50 2.48 1.66 1.00
1984 5-sp Warner Gear LQ9 3.76 2.18 1.42 1.00 .72
LC1 3.50 2.14 1.39 1.00 .78
LG4 2.95 1.94 1.34 1.00 .73
L69-HO 2.95 1.94 1.34 1.00 .73

1985 TH-700R4 ALL 3.06 1.63 1.00 .70
1985 5-sp Warner Gear LQ9 3.76 2.18 1.42 1.00 .72
LB8 4.03 2.37 1.50 1.00 .76
LG4 2.95 1.94 1.34 1.00 .63
L69-HO 2.95 1.94 1.34 1.00 .63
1986 TH-700R4 ALL 3.06 1.63 1.00 .70

1986 5-sp Warner Gear LQ9 3.76 2.18 1.42 1.00 .86
LB8 3.50 2.14 1.36 1.00 .78
LG4 2.95 1.94 1.34 1.00 .63
LG4 3.35 1.93 1.29 1.00 .63
L69-HO 2.95 1.94 1.34 1.00 .63
L69-HO 3.35 1.93 1.29 1.00 .61

1987 TH-700R4 ALL 3.06 1.63 1.00 .70
1987 5-sp Warner Gear LB8 4.03 2.37 1.50 1.00 .76
LG4 2.95 1.94 1.34 1.00 .63
LB9 2.95 1.94 1.34 1.00 .63
LB9 2.95 1.94 1.34 1.00 .73

1988 TH-700R4 ALL 3.06 1.63 1.00 .70
1988 5-sp Warner Gear LB8 4.03 2.37 1.50 1.00 .76
LO3 2.95 1.94 1.34 1.00 .63
LB9 2.95 1.94 1.34 1.00 .73 1989-1992

Not available yet, but here are a couple that are belived to be correct.
1992 T5 2.68 1.80 1.31 1.00 .75
1991 T5 LO3 2.95 1.94 1.34 1.00 .63
T5 TPI Induction 2.75 1.94 1.34 1.00 .74
4L60-E 3.06 1.62 1.00 .70

Originally posted by oil pan 4
(deleted by moderator)

I like having 6 gears, good info though :thumb:

Suggestions:

1. Don't "Quote" on something like this... it just wastes bandwidth.

2. When you ask a question, tell us what "the car" is, so someone won't waste a ton of time telling you about auto tranny ratios when you are only interested in 6-speed manuals... and for what year/engine?

If you want to choose gears, whether thay are available for your car or not, try Chapter twelve of Tune to Win by the late Carroll Smith. Barnes and Noble often have a copy in the auto area. There's a lot of good stuff in that book.

If you mean gears for your T56 Camaro, search for the available combinations online, then search these forums for thread(s) on shift points and gearing. There are some techniques there, assuming you know your engine's torque curve.

For some thought exercises, compare the T-56 gearing and torque curves for a standard LS1 C5 Vette and the LS6/Z06 combination. Why do you think Chevy geared the Z06 the way it did, Trey?

Originally posted by OldSStroker
For some thought exercises, compare the T-56 gearing and torque curves for a standard LS1 C5 Vette and the LS6/Z06 combination. Why do you think Chevy geared the Z06 the way it did, Trey?

I dont know about the gearing in the standard vette, Z06 or the differences in their powerband. I imagine the Z06 has more top end?

If this is the case i'm going to go out on limb and say the first gear is steeper the gearing is closer.

Originally posted by TreySpeed
I dont know about the gearing in the standard vette, Z06 or the differences in their powerband. I imagine the Z06 has more top end?

If this is the case i'm going to go out on limb and say the first gear is steeper the gearing is closer.

Don't guess, look it up. You'll find out what the ratios and torque curves are. Think about it and figure out WHY they are what they are. If you want to learn, you need to work at it. It'll mean more to you and you'll remember it longer.

Originally posted by OldSStroker
Don't guess, look it up. You'll find out what the ratios and torque curves are. Think about it and figure out WHY they are what they are. If you want to learn, you need to work at it. It'll mean more to you and you'll remember it longer.

will do, i'll look it up over the weekend