valhalla360 wrote:
If you get the 10 speed transmission, the rear end ratio is not of great importance. It will just select a gear to get the same overall gear ratio. Then engine will have no idea what's happening past the crank shaft.
The only reason to go to the 4.XX rear end is if you need that last couple thousand pounds of tow rating.
I agree …. Get 3.55 gears if you’re getting a f250. If you get an F350 SRW you’ll have to get 3.73 gears. 4.30 is only of much value when you want the extra torque to start out from a stop with a heavier trailer on a hill.