Ford T9 5-Speed Semi-close ratio
This transmission is similar to those used in the Caterham's except it has a short input shaft - about 1" shorter than the version used with the Caterham's. My unit was rebuilt using Ford internals that result in semi-close ratio gears without resorting to straight cut (noisy) gears. Here are the ratios of the stock Ford Sierra/XR4Ti, my semi-close ratio unit and the Quaife close ration transmission. BTW, my transmission is less than 1/2 the price of the Quaife and I get to deal with a Woody at Birkin Sport in Vacaville CA (a big plus with anything on the Birkin):
Final drive ration is 4:10 to 1. I have a Quaife LSD unit, but it has not yet been installed (just lazy I guess).
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