I've got the same problem, 4.10's and 35's. I have to run in drive instead of OD. I drove it on the interstate the other day for the first time since the 35's were put on and it kept kicking in and out of overdrive to stay at 65 mph. I had 3.73's and 235/75/15's stock, so the calculator says I need 4.56's to get back to stock. There are some good calculators for this stuff at 4lo.com
