I have a 97 F250 H/D that came with 3.55 gears. I put 35" BFG's on the truck and pull a 12,500lb 5th wheel. Does anyone know what ballpark I would be in to have the gears changed to 4.10's. I know there are a lot of variables so I am just looking for a ball park.

 

1 week ago I switched from the 3.55 to the 4.10 on a 1997 5spd 150 with theh 4.6 V8

$882 plus I added a limited slip for a grand total of $1057.

You're in a different ballpark than me with the tires and lift but damn that change really wakes up my little V8!