View Full Version : Gearing for 37" tires and 33' trailer

10-25-2004, 09:11 PM
Just to let ya all know (if ya care http://www.socaps.comimages/graemlins/smile.gif ), Im gettin' my triple pillar gauges, firestone airbags with cab control, traction bars, and new gearing done all at the same time hopefully next week. Already put half $$ down, so its a for sure deal. Quick question though.....I have 37" tires and Im going to be pulling a 33' (about 10,500 lbs dry) trailer probably 2 times a month on long trips. I am changing my gearing, but want to get your guys opinions on what ratio to go with. I know a couple of you had suggested a couple, and with that info, I am leaning towards the 4.56 ratio, since I plan on towing quite often. I dont really use the truck on a day to day basis.

Any info is greatly appreciated http://www.socaps.comimages/graemlins/grin.gif

10-25-2004, 09:35 PM
4.56's are what you seek.

Example: if you have 38" tires, that's roughly equal to a 265/75-16 and 3.73 gears. So, you're a little taller on the gears, but..that's a good thing if you tow a lot.

10-26-2004, 06:33 AM
Thanks Tom, I will go with that then http://www.socaps.comimages/graemlins/smile.gif

10-26-2004, 11:44 AM
I have 4.56's with 38's and love it.

But, now I wish I'd gone 4.88. (larger tires...39.5's)

11-13-2004, 10:04 PM

Who do you recommend for gears, purchase and install?


11-13-2004, 10:20 PM
I just sent my friend and his PSD to Ramjet Engineering in Sun Valley last week. It was about $1200 installed. That was for front and rear gears and rebuilding his LS rear diff. They had his truck for 2 days. He was very happy with them there.

11-14-2004, 09:34 AM
Bigfish had his done somewhere in the vally. (4 wheel outfitters or something?)
Pretty cheap.

Hicks 4x4 in Pomona is good, too. (ask for Vince)