hi guys
my escort coz is recording a difference of 10% wheel speed front to rear on the dyna pack, the front diff is std and the gearbox has been overhauled including the viscous, the guys are checking the rear diff teeth wise, what else could it be???????????????????

 

I wouldn;'t worry about it at all, my saff was similar, had about 20% difference in wheel speed front to rear

 

only prob is that the dyna pack wont allow the guys to finish the power run while attempting to map it because of the wheel speed difference