Normally I would post this on F150online but since they site is down, I figured Id give it a shot here.
I have a F150 04 2wd with a 9.75 rear end. Im upgrading my rims and tires to 31.5". However 22" of that is Rims which will be about 35lbs each. Tires will be another 50lbs. Due to alot of rotating mass I want to turn in these stock 3.55s and possibly go 4.1xs, 4.3xs (if they make them), or 4.56. My truck is a performance street truck which I do 80% street driving, and 20% highway.
So my questions are is 4.56 to much gear? Truck has OD aka 4th. Also im at a loss to who sells gears for my truck, ive looked alot of places but cant find any. Any info would help out. I went from 3.55 to 4.10 in my ranger and I dont think I noticed a difference. Im kind of worried about going 4.1x and im leaning towards atleast 4.3x if not 4.56.
Current :-: 2004 F150 Lariat 5.4L 3V | Whipple 8PSI | True Dual Exhaust | 14.5 @ 93.3 (Quarter throttle launch due to horrible traction)
SOLD :-: 2004 Ranger 4.0L XLT 2WD | 4.10 Limited Slip | K&N Intake 63 Series | Borla Turbo Muffler | JBA Headers | Data Logged XCal2 | 2003 SVT 18x9 Rims | 255/55/18 BFG KDW2