lifting truck 6"

punkrockford · Mar 14, 2013

I am lifting my truck 6 inches. I am going to be running 37" tires. Its a 2010 f250 5r110 tranny and 3.55 gears. will i need to change my gear ratio in the front and rear axel for this size tire. if so what if i go with 35" tires?

thanks for the input guys.

powerstrokin15 · Mar 14, 2013

you should be fine with that ratio. i think there's plenty of guys on here running that same setup

Karls03 · Mar 15, 2013

It really depends on what you re doing with it. If you're hauling/towing, then yeah, gear it. If it's a daily commuter, then a set of gears might help, but not required, it's personal preference at that point.

Dzchey21 · Mar 15, 2013

Yep just run it it will be fine

sootie · Mar 15, 2013

i had the same question as the OP. will my dyno numbers and track times be significantly lower with 3:55 vs 3:73? running a 35" tire.

Dzchey21 · Mar 15, 2013

No might actually help by putting a load on the dyno.

There was a guy that ran 12.7 on 37s and 3.55s couple years back. Obviously you will go faster with smaller tires but a lower ratio won't help

TXGLASSMAN · Mar 15, 2013

i have a 3.55 gear ratio on my 2011 and im going to 36/1550/20 tires today in the mickey thompson ATZs and they are compareable to most 37s height wise.

mine did fine with the 35s on it now and it will do just fine with the 37s

should know how well it will do with 37s in a few hours

06Mud_Slut · Mar 15, 2013

I'm actually having the same dilema. I'm putting 37's on next week and I was worried about the 3.73's I have in the truck now. Good to know it's no biggie.

punkrockford · Mar 16, 2013

TXGLASSMAN said:
i have a 3.55 gear ratio on my 2011 and im going to 36/1550/20 tires today in the mickey thompson ATZs and they are compareable to most 37s height wise.

mine did fine with the 35s on it now and it will do just fine with the 37s

should know how well it will do with 37s in a few hours

So how did it do with the 37's?