- Getrag F28/6 transmission
The Getrag F28/6 manual transmission was built by
Getragand fitted to the C20LET2.0L Turbo Opel Calibra. It was a 6 speed transmission with the following configuration:
Clutch Diameter 9.0 inches
1st Gear Ratio 3.57:1
2nd Gear Ratio 2.16:1
3rd Gear Ratio 1.45:1
4th Gear Ratio 1.10:1
5th Gear Ratio 0.89:1
6th Gear Ratio 0.74:1
Reverse Gear Ratio 3.23:1
Final Drive Ratio 3.72:1 (Front), 3.70:1 (Rear)
There have been many references to the numbering designation that Vauxhall elected to utilse 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 Auto ft.lbf|280|0 torque limit. Other arguments include that it is simply related to the engine size (the F28 gearbox was fitted to a 2.0L turbo engine, with the 1.4 multiplier applied for turbocharged vehicles).
The F28/6 in the Calibra was designed to follow a transverse oriented
C20LETengine feeding the front wheels with an outlet to facilitate a driveshaftto feed the rear wheels as well. If the all wheel drive system is disengaged the gearbox will feed only the front wheels. Conversion kits are readily available from aftermarket suppliers to convert the 6 speed transmission to suit a front wheel drive vehicle [Courtenay Sport, "Transplants", "See Heading F28 to 2WD". Accessed 9 Dec 2006 [http://www.courtenaysport.co.uk/default.htm?page=19] ] , and this is not an uncommon upgrade (from the 5 speed F20 transmission) amongst owners of the C20XEand X20XEVCalibras.
The nomenclature of the GM transmissions is as follows:
The letter F stands for "F"ront-wheel-drive.Although the F28 is only used in AWD applications, the base transmission still remains a common FWD gearbox.The number 28 stands for the maximum torque capacity in Nm/10.28 means that, the transmission is capable to transfer 280 Nm nominal torque on the input shaft.
Compare:Actual transmission in Vauxhall/Opel Signum: F40 means: FWD transmission with torque capacity of 400 Nm.
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