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post #5 of (permalink) Old 01-22-2014
SHELBY GT 350 Member
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JBert's Avatar
Joined: Jan 2011
Location: Central Massachusetts
Posts: 9,172
go in the same way as always to load a tune, and use option "adjust parameters" when it pops up on the screen . . . . scroll through the list and find rear end ratio, then go in there and change it, then continue the tune load ; it will load the tune with the corrected rear end ratio and that will fix the speedometer

| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day
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