[HighStrokin]

I need to change the gears due to the 38" tires i'm trying to run on the my truck.I know that most guys with those size tires are running 4.56's. I looking to get my gear ratio back to around a 3.55 or so with 38's. I don't want to go to lower due to the fact that i might downsize the tires in the future and don't want to have to swap gears if the change tires.

 

[dondiesel444]

I just installed 4.30's in my truck. I have 35" tires, they are awsome, a huge difference over stock, they make the truck a little lower geared than stock, about 3.80-3.90

if you are thinking of downsizing in the future, I'd say go with the 4.30's, you'll gain back a lot of power you lost with the 38's, if you go with 4.56's and do downsize latter, I think 4.56's will be too low.

 

[HighStrokin]

Do you 4.10 are still to tall for the tires i'm running.

 

[dondiesel444]

4.10's aren't much of a change form 3.73's I don't know if its worth it considering your running 38" tires....

 

[BigSuperduty]

DrSpeed is running 4.10's on his truck with the 40" goodyears. He says he likes the combo but he does have a 6 speed. I'm running 39.5" with stock gears still. I think i'm gonna go 4.30's. I think 4.56's will be having me revving too high on the highway, cuz i like to cruise at 75-80mph /ubbthreads/images/graemlins/biggrin.gif

 

[drdenny1]

I hve 35's and when I get the $$$ I'll be doing the 4:30's for sure. /ubbthreads/images/graemlins/smokin.gif

 

[HighStrokin]

Who makes a good set of gears (4.30) for these trucks and who sells them? /ubbthreads/images/graemlins/laugh.gif

 

[dondiesel444]

Randy's Ring and Pinion

Percision Gear

and gas powered Superduty's came with 4.30's stock so you can get the gears right from Ford.