Originally Posted by jsgoss02
Wanted to throw this out there and see what other's think. My code on the door panel for the axle reads H9. H9 code indicates the rear differential should be a 3.55 Limited Slip. Now, this is a 92 Ford F150, 4x4, E4OD, and 5.8 EFI engine. I really believe that the original rear differential may have been removed. This is why I think this. At 55mph, the rpms are 1600. I could be wrong, but I would've thought that 3.55's would turn more rpms at this speed. The wheels are 31's. Also, one back wheel will spin by itself in the back. Would not both wheels spin with limited slip? What do you guys think? Thanks.
My 1990 5.8 has 3.55 gears and when it did have an E40D I was running right were you are. also with 31x10.50s.
now with my 5 speed I am running 2400 at 70 and 1500 at 45. 5th gear is a .84.