Getrag F25 transmission: Difference between revisions
mNo edit summary |
|||
| Line 1: | Line 1: | ||
{{unreferenced|date=April 2009}} |
{{unreferenced|date=April 2009}} |
||
The '''Getrag F25 manual transmission''' was fitted to many vehicles in the European [[Opel]] production line up including the [[Opel Calibra]]. It was a 5 speed transmission with the following configuration: |
The '''Getrag F25 manual transmission''' was fitted to many vehicles in the European [[Opel]] production line up including the [[Opel Calibra]]. It was a 5 speed transmission with the following configuration: |
||
* [[https://en.wikipedia.org/wiki/Front-wheel_drive|Front Wheel Drive]] |
|||
* [[Transverse]] mounted |
|||
* Clutch Diameter {{convert|9.0|in|mm}} |
* Clutch Diameter {{convert|9.0|in|mm}} |
||
* Dry 100 lbs / Wet 102 lbs |
|||
==Gear Ratio== |
==Gear Ratio== |
||
| Line 24: | Line 29: | ||
==Performance== |
==Performance== |
||
In the US, there is a leading ECOtec performance shop FMSR Performance that has lead the way in creating a fully built F25 gearbox. They have done this by strengthening & revising the internal components to increase the total torque output to over 300-475+ lb-ft compared to 250+ lb-ft on a stock gearbox. It is the only shop to offer these performance gearboxes to the public, most modified F25 gearboxes where only offered to the European race teams in years past. The shop now offers two types of "stage" built F25 transmissions including a specialized 4.45 final drive model, they also offer other options for the F25 transmissions as well. |
In the US, there is a leading ECOtec performance shop [https://www.fmsrperformance.com/ FMSR Performance] that has lead the way in creating a fully built F25 gearbox. They have done this by strengthening & revising the internal components to increase the total torque output to over 300-475+ lb-ft compared to 250+ lb-ft on a stock gearbox. It is the only shop to offer these performance gearboxes to the public, most modified F25 gearboxes where only offered to the European race teams in years past. The shop now offers two types of "stage" built F25 transmissions including a specialized 4.45 final drive model, they also offer other options for the F25 transmissions as well. |
||
==References== |
==References== |
||
Revision as of 15:01, 6 April 2015
 |
The Getrag F25 manual transmission was fitted to many vehicles in the European Opel production line up including the Opel Calibra. It was a 5 speed transmission with the following configuration:
- [Wheel Drive]
- Transverse mounted
- Clutch Diameter 9.0 inches (230 mm)
- Dry 100 lbs / Wet 102 lbs
Gear Ratio
- gear ratio 3.38:1
- gear ratio 1.76:1
- gear ratio 1.12:1
- gear ratio 0.89:1
- gear ratio 0.77:1
- reverse gear ratio 3.17:1
- differential ratio 3.82:1 or 4.05:1
Designation
There have been many references to the numbering designation that Opel elected to utilise for gearboxes, one of the more common arguments is that it refers to the ft·lbf torque capacity of the gearbox, in this case being a 250 lb⋅ft (339 N⋅m) torque limit. Other arguments include that it is simply related to the engine size (the F25 gearbox was often fitted to 2.5L engine vehicles).
This argument, that is engine size is the justification for the numbering could be disputed as the Opel Vectra B with the 2.6L V6 engine was in fact fitted with an F23 transmission.
As an example the F25 transmission was fitted to the Opel Calibra 2.5L models (C25XE and X25XE engined models)
The numerical designations usually indicate the maximum torque rating of the gearbox in Newton Metres. For example the F40 gearbox is rated at 400Mn or 295 ft/lbs torque. The M32 gearbox is rated at 320Nm. The F17 gearbox is rated at 170 Nm, and so on.
Performance
In the US, there is a leading ECOtec performance shop FMSR Performance that has lead the way in creating a fully built F25 gearbox. They have done this by strengthening & revising the internal components to increase the total torque output to over 300-475+ lb-ft compared to 250+ lb-ft on a stock gearbox. It is the only shop to offer these performance gearboxes to the public, most modified F25 gearboxes where only offered to the European race teams in years past. The shop now offers two types of "stage" built F25 transmissions including a specialized 4.45 final drive model, they also offer other options for the F25 transmissions as well.
References
Links to reliable source of GM gearbox specifications & information.