JDM 6 speed
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Most jdm 6 speeds have 3.9 front diffs 1:1 transfers so need 3.9 rear diffs
Most uk 6 speeds have 3.9 front diff 1.1:1 transfers so need 3.545 rear diff.
Steve, your car will have come with a 3.545 rear diff originally.
Most uk 6 speeds have 3.9 front diff 1.1:1 transfers so need 3.545 rear diff.
Steve, your car will have come with a 3.545 rear diff originally.
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I reckon there's no reason why you couldn't change the step off gears [transfer gears ] from the UK box to the JDM box and vice versa. Thus you could have the benefit of the better 5th and 6th ratios of the JDM box and run the 3.5454 Uk rear diff.
ALL 6 speeds so far seen by API are 3.9:1 ratio front diff. US Forester may be different but you'd need the US guys to advise.
That help??
David APi Engines / APi Impreza
ALL 6 speeds so far seen by API are 3.9:1 ratio front diff. US Forester may be different but you'd need the US guys to advise.
That help??
David APi Engines / APi Impreza
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I reckon there's no reason why you couldn't change the step off gears [transfer gears ] from the UK box to the JDM box and vice versa. Thus you could have the benefit of the better 5th and 6th ratios of the JDM box and run the 3.5454 Uk rear diff
I know Steve has changed his box before, so dont know what rear diff he has.
Steven
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