Is there anybody out there that can confirm for me the ratios of the Auto Tranny on a 2007 JK, I just had 4.88s fitted and my RPM and speedo ( pro cal corrected), are the same as my mates, who has a 2011 Auto and he has 4.56s. Both of us have 315x70x17 tyres, diffrent brand ( I know there could be a small difference in the tyre size). Is htere a difference in the 4th gear between the years or are the auto boxes the same 2007to 2011??? My RPMs read 2250 at 110kmh.
Any help would be appreciated.
Any help would be appreciated.