Run 37's without re-gearing? Good? Bad? meh? - Ford Powerstroke Diesel Forum
Wheels, Tires, and Brakes Here's where you can post all your topics and questions about wheels, tires and brakes.
Sponsored by Discount Tire

Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-06-2012, 05:39 AM
Compression Ignition Addict
 

Join Date: Feb 2011
Location: Rochester
Posts: 197
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Run 37's without re-gearing? Good? Bad? meh?

Considering a 6" lift... With that, Im interested in how important it is to re-gear to 4.10s if I run a 37 with it. Truck is stock with 3.73s, I don't tow much, just a small camper and a car occasionally, nothing more than 5000-6000 pounds. If i run the 37's without going to 4.10s will that wreck the tranny, or just make the truck a total dog when I'm towing? Kind of a rookie question I know, never ran a lift/tires this big on anything before and of course im doing homework on my own but Im looking for your input...
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 07-06-2012, 06:11 AM
Powerstroke.org Rookie
 

Join Date: May 2012
Location: Norfolk, VA
Posts: 28
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Well I got an 8 inch lift with 38's on it and I also got 3.73's. I have never towed anything yet so I couldnt tell you how good it is while towing but unloaded or stuff in the bed it isnt horrible. My intake, exhaust, superchip probably help with that but I dont have any issues. But I would imagine it might hurt while towing. Someone else can chip in. And I am still get approximatly 13 MPG with purely only stop and go so. Thats my experienced. If I boost launch it will still smoke the 38's on accident lol
Reply With Quote Quick reply to this message
  #3  
Old 07-06-2012, 06:23 AM
Real Men of Genius
 

Join Date: Apr 2010
Posts: 5,224
Thanks: 1
Thanked 23 Times in 22 Posts
Feedback Score: 9 reviews
Without re-gearing, you'd really hurt the MPG on the setup. I've also heard that a 6" lift (which is what I have) will still rub on 37" tires (which is what I want). I don't think the transmission would be a factor, provided you have a good tow tune that tunes the transmission. I don't tow anything, but I've listened to what others have said and this is what I've taken from the majority of conversations.

Good luck!
Reply With Quote Quick reply to this message
  #4  
Old 07-06-2012, 06:45 AM
Compression Ignition Addict
 

Join Date: Feb 2011
Location: Rochester
Posts: 197
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Im starting to lean towards the 6" with 35x12.5s but keeping my options open. Super diesel, is that your set up with 35's on it in your sig?
Reply With Quote Quick reply to this message
  #5  
Old 07-07-2012, 10:55 PM
Real Men of Genius
 

Join Date: Apr 2010
Posts: 5,224
Thanks: 1
Thanked 23 Times in 22 Posts
Feedback Score: 9 reviews
Quote:
Originally Posted by eurotrashb5 View Post
Im starting to lean towards the 6" with 35x12.5s but keeping my options open. Super diesel, is that your set up with 35's on it in your sig?
Yep, sure is. 35s look a tad small on my truck to be honest... but I've just recently started hearing that 37s rub on a 6" lift. Looks like I'll have to go bigger on the lift to fit 37s without rubbing and/or trimming - which I'm not gonna do. So, I'll stick with 35s for now.

Last edited by Super Diesel; 07-07-2012 at 11:05 PM.
Reply With Quote Quick reply to this message
  #6  
Old 07-08-2012, 08:15 AM
Compression Ignition Addict
 

Join Date: Mar 2008
Location: FL
Posts: 4,247
Thanks: 21
Thanked 30 Times in 21 Posts
Feedback Score: 0 reviews
Honestly, its not worth the money to go from 3.73's to 4.10's. Very little difference, and most people will go up to 4.30's for that reason. If you end up with 35's instead of 37's, then definitely keep the 3.73's.
Reply With Quote Quick reply to this message
  #7  
Old 07-08-2012, 09:44 AM
Real Men of Genius
 

Join Date: Apr 2010
Posts: 5,224
Thanks: 1
Thanked 23 Times in 22 Posts
Feedback Score: 9 reviews
Quote:
Originally Posted by Snake View Post
Honestly, its not worth the money to go from 3.73's to 4.10's. Very little difference, and most people will go up to 4.30's for that reason. If you end up with 35's instead of 37's, then definitely keep the 3.73's.
This is a little off topic, not meaning to derail - but just curious - what would be the outcome of having 4.10 or 4.30 gears with 35" tires?
Reply With Quote Quick reply to this message
  #8  
Old 07-08-2012, 01:44 PM
Compression Ignition Addict
 

Join Date: Mar 2008
Location: FL
Posts: 4,247
Thanks: 21
Thanked 30 Times in 21 Posts
Feedback Score: 0 reviews
Basically you'd have a lot of get up and go, but you'd be turning a lot of rpms at highway speeds.
Reply With Quote Quick reply to this message
  #9  
Old 07-09-2012, 06:41 AM
Compression Ignition Addict
 

Join Date: Feb 2011
Location: Rochester
Posts: 197
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Yeah, i do kind of like the small goofy look if the tires are poked out a bit. weird i know. but yeah 4.10s with 35's wouldnt be much fun except leaving stop lights. Would result in pretty poor gas mileage on the highway. Dont feel like spending the money to regear if I'd be best off to go with 4.30s.
Reply With Quote Quick reply to this message
  #10  
Old 07-09-2012, 07:02 AM
Compression Ignition Addict
 

Join Date: Mar 2008
Location: FL
Posts: 4,247
Thanks: 21
Thanked 30 Times in 21 Posts
Feedback Score: 0 reviews
I know I'm comparing apples to oranges, but my 6.0 came with 3.73's and the tires were 34" in diameter from the factory. Aftermarket 35's with rims are a little heavier and wider and you'd notice a difference in performance going to 4.10's, but the cost of re-gearing doesn't really make this a good decision IMO. When I went to 8" of lift and 37's, I drove on the 3.73's for a couple of months until my TruTrac showed up. I went to 4.30's and the truck is turning slightly higher rpm's at highway speeds, but I would absolutely recommend re-gearing if going 37's or bigger. Not only to try to get back to the engine rpm's "sweet spot," but to offset the additional weight of the tires, rims, and lift kit (and the decreased aerodynamics of a lifted truck).
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 06:10 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors