/forums/images/graemlins/1zhelp.gif I have 35s right now and am going to put 39" swamper ssrs on my truck in about a year. I have 3.73 right now and was thinking about 4.10 gears. I been looking at tire gear ratio chart and it says I should run a 4.88 gear. Can someone please give me some advise on this matter. Its been about 12 years sense I dont any hard core wheeling. I have a TH350 and NP203 and pushing 400 plus HP. Thank you guys for your time and help.