Hello all. Im in the process of ordering a Troyer tuner and I need to know what gears I have now. I have a 99 F150 scab with the 4.2/auto. I have written down all the numbers to help decode this. Please help!!

Axle: 27 (from door jamb sticker)

ALL the numbers off the axle tag(ford 8.8)


S854B
3 31 88 8H06

I wrote them just like they are on the axle. Thanks in advance......

 

That would be a 3.31 ratio, non-limited-slip, 8.8 rear end.

-Joe