THANKS EVERYONE>>>>>My truck does 55mph, but right then it makes a horrible sound if i push it any harder, so i always back down. I wont do the rear end if it only get me 5mph, If i can get 10mph i will do it for sure. Everthing else runs great thats why i'm keeping stock drivetrain. I just need it to run smooth at 55, not winding high and not sounding good! So mabye something else is wrong but every one i;ve talked to says 55mph is about it. My manual says it only has a max speed of 63mph.
