Allison V series
The Allison V Series was an automatic transmission used on heavy duty vehicles. It was used on vehicles with a transverse angle drive (V-drive) powertrain layout. It was first produced as a mechanical transmission in 1935. The General Motors Truck and Coach Division first introduced an automatic V-drive transmission for buses in 1947 and then refined the design in 1959 with a hydraulic configuration known as the VH series.[1]
Models
VH Series
This series was introduced for GM buses in 1947. The VH transmission used hydraulic shift governor. It was produced up to 1976 and was discontinued upon the release of the V730 transmission.
| Type | Max. input power | Max. input torque | Mass | Number of speeds |
|---|---|---|---|---|
| VH | approx. 244.5 kg / 539 lbs (dry) | 1 or 2 | ||
| VH2 | approx. 244.5 kg / 539 lbs (dry) | 1 or 2 | ||
| VH4 | approx. 244.5 kg / 539 lbs (dry) | 1 or 2 | ||
| VH5 | approx. 244.5 kg / 539 lbs (dry) | 1 or 2 | ||
| VH6 | approx. 244.5 kg / 539 lbs (dry) | 1 or 2 | ||
| VH7 | approx. 244.5 kg / 539 lbs (dry) | 1 or 2 | ||
| VH9 | 198 hp | 600 lb-ft | approx. 244.5 kg / 539 lbs (dry) | 1 or 2 |
VS Series
This series was introduced in 1966. The VS transmission used a solenoid to shift. The 3rd gear (overdrive) was powered by hydraulic fluid and had a separate clutch pack. There were minor differences between the models meant for 6 cylinder engines and 8 cylinder engines. It was produced up to 1976 and was discontinued upon the release of the V730 transmission.
| Type | Max. input power | Max. input torque | Mass | Number of speeds |
|---|---|---|---|---|
| VS1 | 259 hp | 750 lb-ft | approx. 244.5 kg / 539 lbs (dry) | 1 or 2 |
| VS2-6 | 198 hp | 600 lb-ft | approx. 269.9 kg / 595 lbs (dry) | 2 or 3 |
| VS2-8 | 259 hp | 750 lb-ft | approx. 269.9 kg / 595 lbs (dry) | 2 or 3 |
V730 Series
This series was introduced in 1976. It was discontinued in 2002. No other V-drive transmissions were produced by Allison afterward.
| Type | Max. input power | Max. input torque | Mass | Number of speeds | Notes |
|---|---|---|---|---|---|
| V730 | 205 kW / 275 hp | 1207 Nm / 890 lb-ft | approx. 405 kg / 890 lbs (dry) | 3 | |
| V(R)731 | 205 kW / 275 hp | 1207 Nm / 890 lb-ft | approx. 425 kg / 935 lbs (dry) | 3 |
|
| V(R)731R | 205 kW / 275 hp | 1207 Nm / 890 lb-ft | approx. 495 kg / 1090 lbs (dry) | 3 |
|
| V(R)731RH | 205 kW / 275 hp | 1207 Nm / 890 lb-ft | approx. 516 kg / 1135 lbs (dry) | 3 |
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