My son has a 94 F150 with a 4 inch Suspension lift and running 35X12.5X15

He has stock gears and has been told to change out to 410... is that correct... looking of others to either confirm or say stay with stock.. he just wants to get better mileage and less wear and tear on the engine.. and won't be taking it into mud bogs or anything like that...

 

is it two wheel drive or four the reason I ask is if you it's four wheel drive then you have to change both differentials to keep the transfer case from being ruined or shelled out. when trying to improve mpg the higher the gear the better the mpg because the engine doesn't have to turn the rpm's that would if it had or has a lower gear ratio