Tech Equations
The following equations and rules apply only to 4-cycle engines powered by pump gasoline. The equations have been simplified for ease of understanding. Answers will approximate, but generally close enough for use as a guideline.
It is recommended that you round your result to the nearest hundreth, ie. 4.118325 = 4.12
Gear Ratio= Rear Axle ratio multiplied by Transmission gear ratio. (Tranny list below) Ex: 4.11*1=4.11 (rear axle=4.11) (1=1:1, fourth gear in some trannies.)
Tire Radius= Distance, in inches, from the center of the tire to the ground.
| 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 | |||||