 | This article relies largely or entirely on a single source. (April 2019) |
| 4T60-E/4T65-E | |
|---|---|
| Overview | |
| Manufacturer | General Motors |
| Production | 1990–2011 |
| Body and chassis | |
| Class | 4-speed transverse automatic transmission |
| Chronology | |
| Predecessor | Turbo-Hydramatic 125 |
| Successor | 6T70 |
The 4T60-E (and similar 4T65-E) is a series of automatic transmissions from General Motors. Designed for transverse engine configurations, the series includes 4 forward gears. The 4Txx family is an evolution of the original Turbo-Hydramatic 125 transverse automatic introduced in the late 1970s and the Turbo-Hydramatic 440 transmission developed in the mid-1980s.
The "-E" transmission is electronically controlled and features an automatic overdrive transaxle with an electronically controlled torque converter clutch.
The 4T65 is built at Warren Transmission in Warren, Michigan.
Gear ratios:
| 1 | 2 | 3 | 4 | R | Diff Ratio |
|---|---|---|---|---|---|
| 2.921 | 1.568 | 1.000 | 0.705 | 2.385 | 2.86, 3.05, 3.29 (HD 3.29) |
Drive and Driven sprocket combinations and ratios
33 Drive / 37 Driven creates a 0.892:1 ratio
35 Drive / 35 Drive creates a 1.000:1 ratio
37 Drive / 33 Driven creates a 1.121:1 ratio
Example -
3.29 diff ratio divided by 1.121 = 2.93
3.29 diff ratio divided by .892 = 3.69