Popular Transmission Ratios
Manual
Transmissions:

AMC SR4 (Borg-Warner)
Jeep
1st 2nd 3rd 4th
4.07 2.39 1.49 1.00
SM 420
1st 2nd 3rd 4th
7.00 3.60 1.70 1.00
SM 465 (MUNCIE)
GM, Chevy
1st 2nd 3rd 4th
6.55 3.58 1.57 1.00
T-176
Jeep
1st 2nd 3rd 4th
3.52 2.27 1.46 1.00
T-177
Jeep
1st 2nd 3rd 4th
3.82 2.29 1.46 1.00
T-178
Jeep
1st 2nd 3rd 4th
3.00 2.08 1.46 1.00
Mazda 5-spd
Ford, Mazda?
1st 2nd 3rd 4th 5th
3.40 2.20 1.50 1.00 0.79
NV3500
Chevy
1st 2nd 3rd 4th 5th
4.02 2.32 1.40 1.00 0.73
NV4500
Chevy
1st 2nd 3rd 4th 5th
5.61 3.04 1.67 1.00 0.73
ZF S6-650
Chevy
1st 2nd 3rd 4th 5th 6th
5.79 3.31 2.10 1.31 1.00 0.76
Automatic
Transmissions:

TH 350
Chevy
1st 2nd 3rd
2.52 1.52 1.00
TH 400
GM, Chevy, Jeep
1st 2nd 3rd
2.48 1.48 1.00
TH 700R4
GM, Chevy
1st 2nd 3rd 4th
3.06 1.62 1.00 0.70
4L80-E
Chevy
1st 2nd 3rd 4th
3.10 1.48 1.00 0.75
Allison 1000 Series
Chevy
1st 2nd 3rd 4th 5th
3.10 1.81 1.41 1.00 0.71
C-4/C-5/C-6
Ford
1st 2nd 3rd
2.46 1.46 1.00
Ford AOD
Ford
1st 2nd 3rd 4th
2.40 1.47 1.00 0.67
TORQUEFLITE 727
Jeep, Dodge
1st 2nd 3rd
2.45 1.45 1.00