Notices
JK Off-Road 101 Bulletin board forum regarding topics such as general off-roading tips, tricks, techniques and equipment usage such as winching and vehicle recovery information.
Sponsored by CARiD
Click Here

does not perform as expected, need advice

 
Old 06-06-2018, 08:43 PM
  #11  
JK Freak
 
tjkamp's Avatar
 
Join Date: Nov 2013
Location: Sweet Home, TX
Posts: 848
Likes: 0
Received 19 Likes on 19 Posts
Default

Preferred gear ratios are 100% opinion.

That being said, if you are spending the money for a regearing, and planning for 35s, I would go 4.56 or 4.88.

I have a 3.6 6speed Rubi on 35s. She is a bit heavy, about 700lbs overweight going by the sheriff's department scales, and I really want to regear. I just haven't been able to justify it as it would be a short jump for me, as I think 5.13s would be overkill.
tjkamp is offline  
Old 06-06-2018, 08:49 PM
  #12  
JK Freak
 
tjkamp's Avatar
 
Join Date: Nov 2013
Location: Sweet Home, TX
Posts: 848
Likes: 0
Received 19 Likes on 19 Posts
Default

The gear ratio charts found on google are super handy, just search Jeep jk 3.6 gear chart, and check it out (was going to post the image, but it kept coming out blurry). Just remember those are for measured mounted tire size, so your 33s are closer to 32s, and my 35s are closer to 34s.

Happy Jeeping!
tjkamp is offline  
Old 07-26-2018, 07:49 AM
  #13  
JK Enthusiast
Thread Starter
 
ldstruckn's Avatar
 
Join Date: Sep 2008
Location: cheyenne wyoming
Posts: 152
Received 0 Likes on 0 Posts
Default

looks like difference between 4.1 and 4.56 is 2300-2500rpm at 70 with 34's..still thinking 4.1 even though I do live at 6000 ft and most of our trails are much higher around here. Plus I would be adding 200-300lbs to jeep with steel front bumper and winch at about the same time. Tough decision. Still leaning toward 4.1 for better mpg
ldstruckn is offline  
Old 07-26-2018, 08:03 AM
  #14  
JK Jedi
FJOTM Winner
 
resharp001's Avatar
 
Join Date: Jun 2013
Location: Willow Park, TX
Posts: 4,458
Received 244 Likes on 233 Posts
Default

Originally Posted by ldstruckn View Post
looks like difference between 4.1 and 4.56 is 2300-2500rpm at 70 with 34's..still thinking 4.1 even though I do live at 6000 ft and most of our trails are much higher around here. Plus I would be adding 200-300lbs to jeep with steel front bumper and winch at about the same time. Tough decision. Still leaning toward 4.1 for better mpg
With a manual, you have a little more leeway. To me, 2500 at cruising speed is the sweet spot (**for the 3.6L), but.....lotta people consider 75mph to be the standard cruising speed on highway, so 4.10 might put you right around that with those tires. You know....not an exact science and there are so many variables. Moving from 3.21 gears though, you'd tell a significant difference. That said, I don't think you're gonna see a dramatic change in fuel economy between the 4.10 and 4.56....at least not enough that I'd make a decision based on that. Now, you start getting up there at 3k rpms on the highway and I can assure you the fuel needed starts dropping a bit faster.

Last edited by resharp001; 07-26-2018 at 08:05 AM.
resharp001 is offline  
Old 07-26-2018, 09:20 AM
  #15  
JK Jedi
FJOTM Winner
 
resharp001's Avatar
 
Join Date: Jun 2013
Location: Willow Park, TX
Posts: 4,458
Received 244 Likes on 233 Posts
Default

https://www.jk-forum.com/forums/market/347135

If those have 4.10s in em, you should seriously just consider an axle swap. You'd get the gearing on top of 2 lockers.
resharp001 is offline  
Old 08-02-2018, 12:16 PM
  #16  
JK Jedi
FJOTM Winner
 
resharp001's Avatar
 
Join Date: Jun 2013
Location: Willow Park, TX
Posts: 4,458
Received 244 Likes on 233 Posts
Default

Originally Posted by resharp001 View Post
Guy has dropped his price on those axles that are only 1hr 40 mins from you....down to $2700. Did you ever check those out? They'd be perfect for you and you'd get 2 lockers in the process.

Last edited by resharp001; 08-02-2018 at 12:27 PM.
resharp001 is offline  
 


Quick Reply: does not perform as expected, need advice


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: