The popularity of the T170 series transmissions is rather hit-or-miss, with a popular consensus that the transmissions are clunky, have a low power threshold, and feature an excessively large step between 1st and 2nd gears. In reality, the step between 1st and 2nd gears is no more severe than that of the 2nd to 3rd step in the popular T-18, NP435, and T-19 manual transmissions. However, the fact that the transmissions lack a low "granny" 1st gear contributes to the fact that the transmissions are unfavorable for utilitarian purposes. Of the three T170 series transmissions, the SMOD is likely the most popular as it features a stronger cast iron case - both the SROD and TOD feature aluminum cases.
T170F-RUG SMOD Gear Ratios & Specs
1 |
2 |
3 |
4 |
R |
|
300 I-6, 302 V-8 |
3.25 : 1 |
1.92 : 1 |
1.00 : 1 |
0.78 : 1 |
3.25 : 1 |
351W |
3.01 : 1 |
1.78 : 1 |
1.00 : 1 |
0.78 : 1 |
3.01 : 1 |
Manufacturer: |
Tremec |
|
Transmission: |
T170F-RUG 'SMOD' |
|
Type: |
4 speed manual, toploaded overdrive |
|
Applications: |
1978 - 1984 Ford F-150, 300, 302, & 351 cid engines |
|
Case Material: |
Cast iron |
|
Synchronized: |
All forward gears |
|
Features: |
• Transmission utilizes 3 side mounted shift rails on the left side of the case • 351 cid V-8 version has a taller 1st and 2nd gear ratio • 300 cid I-6 and 302 cid V-8 version has identical gear ratios as the SROD • Trans code "B" |
|
SM |
Side mounted shift rails |
|
OD |
Overdrive |
T170FS-RUG SROD Gear Ratios & Specs
1 |
2 |
3 |
4 |
R |
3.25 : 1 |
1.92 : 1 |
1.00 : 1 |
0.78 : 1 |
3.25 : 1 |
Manufacturer: |
Tremec |
|
Transmission: |
T170FS-RUG 'SROD' |
|
Type: |
4 speed manual, toploaded overdrive |
|
Applications: |
1980 - 1983 Ford F-150, 300 & 302 cid engines |
|
Case Material: |
Aluminum alloy |
|
Synchronized: |
All forward gears |
|
Features: |
• Shift pattern is identical to other T170 series transmissions, but the shift lever must be pushed downwards in order to engage reverse • Relatively unpopular transmission with sloppy shift characteristics and a low input rating • Utilizes a single shift rail on the side of the transmission |
|
SR |
Single shift rail |
|
OD |
Overdrive |
T170FT-RTS TOD Gear Ratios & Specs
1 |
2 |
3 |
4 |
R |
3.01 : 1 |
1.78 : 1 |
1.00 : 1 |
0.78 : 1 |
3.01 : 1 |
Manufacturer: |
Tremec |
|
Transmission: |
T170FT-RTS 'TOD" |
|
Type: |
4 speed manual, toploaded overdrive |
|
Applications: |
1984 - 1987 Ford F-150 |
|
Case Material: |
Aluminum alloy |
|
Synchronized: |
All forward gears |
|
Features: |
• Same transmission ratios as the 351W versions of the SMOD • Trans code "B" • RTS = "Remote Tower Shift" |
|
T |
Topshift |
|
OD |
Overdrive |