Well if you don't pull much then, it really won't be a big deal. If you did pull a lot I would say 4:56 gears, but there is no need to go that high. I would try it without gearing and if you just don't like how it doesn't pick up and go like it use to then I would re-gear with 4:30s
Well it all depends, I would try everything with the tires first......if you truck is shifting funny cuz the shift points are off then yes send it in, also only you are going to know if you can live with your speedo being off :nod:
A forum community dedicated to Ford F-series owners and enthusiasts with a Power Stroke diesel engine. Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more!