i think i understand it now there is a spur gear drive on the front & rear output out of the gearbox so although the rear diff is 4.111 the the actual diff ratio the gearbox produces is 3.726 for the rear and 3.730 front this complicates the gearbox choice further. so the gear charts need reproducing with 3.726 ratio.
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2002 S8 silver with black half leather
2000 d2 S8 in Racing green pearl, RS4 manual gearbox,
2003 A4 avant TDi
1997 Volvo V40 2.0T
1992 Mazda eunos v spec
1976 Reliant Kitten
1965 Porsche 911
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