question for gearing guru's

[jestersv]

what kind of rpm drops could I expect if I change the rearend gears from a 410 to a 373 or a 355? I use truck to pull a 13xxx LB 5er! Would 355 gears be too much ? it is a 2000 7.3 auto stock as of now planning to add a flip chip to it.

 

[TARM]

At the top right of this page click on the HP calculator. It has a RPM Cal based on gearing tire size. Just remember if you are wanting to figure it for when your in OD to multiple the gearing by ,71.

 

[jestersv]

thanks tarm didn't know it was there and that answers the question even with 3.55's I'll be running 69mph @ 2000 rpms which will keep it in the power band at highway speeds. towing 13000# camper I'm not jumping out at stop lights anyway.