it will probably be a little slower off of the line. i say that because they come stock with the 5.2 and the benefit of doing gears isnt going to be worth it for the price of doing gears IMO.
not for 31's? with the stock gear right now it takes alot more work to accelerate than it used too. and it obviously brought the MPG down. i just wanted to regear to make it simmilar to what it used to be
wouldn't bigger tires lower your rpm's, thus improving mileage? and bigger tires will have less revolutions per mile than smaller ones, saving you some cash on tires in the long run
yeah but M/T's or not a 31" tire takes more power to move thus less MPG. you can still get good cruising MPG but around town it sucks right now im getting like 5-12
The big question here is, how big do you want to go?
I've got 4.56s in my axles now, running 32s. When I swap in my super lightweight 31s, I'm actually hurting a bit on economy...RPMs too high at highway speeds. 33s are in my future, at least at this moment.
4.10 is a great ratio for 31s and 32s. 4.56 is what you want when you're going 33-35. Particularly with the all-around grunt of the 5.2 and 4.7.
You really shouldn't noticed a big difference with 31's, I hardly noticed my 32's and I think most of my lost fuel economy was due to the worsened aerodynamics...I went from getting 17-18 mix driving to 15-16 granted its a different animal.
Maybe you're due for a tune up...for how much you're going to spend on a re-gear, you're never going to get back in fuel savings.
If you do re-gear 4.10's would be the way to go in your case unless you plan on going to 33" +
You really shouldn't noticed a big difference with 31's, I hardly noticed my 32's and I think most of my lost fuel economy was due to the worsened aerodynamics...I went from getting 17-18 mix driving to 15-16 granted its a different animal.
Maybe you're due for a tune up...for how much you're going to spend on a re-gear, you're never going to get back in fuel savings.
If you do re-gear 4.10's would be the way to go in your case unless you plan on going to 33" +
My regear was wholesale cost on the metal and a full day of wrenching dropping the axles and putting them back in. I intend to never have to do that again :laugh:
I'm running 3.73's with 31" MT's. The only thing I noticed is that its a bit slower off the line but its no that big of a deal since I'm not racing it. Still plenty of power and I run just shy of 2K RPM at 70MPH
I paid 1200 for front and rear complete rebuild with 4:56's YUKON
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Jeep Enthusiast Forums
18.5M posts
726.8K members
Since 2000
A forum community dedicated to all jeep owners and enthusiasts. Come join the discussion about performance, engine swaps, modifications, classifieds, troubleshooting, maintenance, and more!