Notices
Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM

Mismatched Gear Ratio Question

Thread Tools
 
Old 07-16-2017, 07:13 AM
  #1  
JK Freak
Thread Starter
 
Ajkaz's Avatar
 
Join Date: Apr 2014
Location: Anaheim, ca
Posts: 505
Likes: 0
Received 4 Likes on 4 Posts
Default Mismatched Gear Ratio Question

Picked up a used prorock front 44 on CL. It has 4.56 and I run 4.88. I'm almost certain but want to confirm the following before driving anywhere: As long as I dont engage 4WD I can run the different gear ratios front to rear even with front shaft installed with no issues. I just need to run a few errands and then drive to the gear shop to have the regear done...
Old 07-16-2017, 09:30 AM
  #2  
JK Enthusiast
 
jordy's Avatar
 
Join Date: Nov 2015
Location: Phoenix, AZ
Posts: 468
Received 18 Likes on 17 Posts
Default

You should be OK. Was thinking there might be an issue with some electronics picking up differences in speed sensors, but the wheels don't care. Keep it in 2WD and do what you need to do.
Old 07-16-2017, 10:26 AM
  #3  
JK Freak
Thread Starter
 
Ajkaz's Avatar
 
Join Date: Apr 2014
Location: Anaheim, ca
Posts: 505
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by jordy
You should be OK. Was thinking there might be an issue with some electronics picking up differences in speed sensors, but the wheels don't care. Keep it in 2WD and do what you need to do.
Thanks! I was thinking that at first also, but the the WSS read at the wheel in the unit bearing independently of each other. I was worried about the transfer case but it looks as though in 2wd there is no physical connection anywhere between the 2 axles drive trains.
Old 07-16-2017, 12:24 PM
  #4  
JK Super Freak
 
zstairlessone's Avatar
 
Join Date: Dec 2009
Location: Texas
Posts: 1,695
Likes: 0
Received 3 Likes on 2 Posts
Default

As long as you already had it removed to change out the axle assembly just leave the front drive shaft in the Jeep (don't re-install it) and have it put on when you do the gears
Old 07-16-2017, 01:51 PM
  #5  
JK Enthusiast
 
YukonBlu's Avatar
 
Join Date: Aug 2016
Location: New Albany
Posts: 184
Likes: 0
Received 0 Likes on 0 Posts
Default

I had the same kind of issue.. was running 5.13s in front and 4.88s in back. I didn't have any issues, just make sure not to put it in 4WD.
Old 07-16-2017, 01:59 PM
  #6  
JK Super Freak

 
ShutterBug's Avatar
 
Join Date: Sep 2013
Location: Mentor, OH
Posts: 1,636
Received 6 Likes on 5 Posts
Default

Don't re-install the drive shaft. Leave it off until you get them geared the same.
Old 07-17-2017, 12:42 AM
  #7  
JK Freak
 
BoraBora's Avatar
 
Join Date: Mar 2015
Location: McLean, VA
Posts: 712
Received 67 Likes on 54 Posts
Default

Originally Posted by ShutterBug
Don't re-install the drive shaft. Leave it off until you get them geared the same.
It won't matter as long as he doesn't engage 4wd.

I had my front driveshaft connected while my rear was 3.73 and my front was 4.10...drove it like that for 2 months until I had both regeared.
Old 07-18-2017, 11:02 AM
  #8  
Former Vendor
 
RiverCityOffroad's Avatar
 
Join Date: Nov 2010
Location: Austin, TX
Posts: 563
Likes: 0
Received 0 Likes on 0 Posts
Default

For peace of mind I'd leave the front driveshaft out. It takes out any possibility of there being a conflict between front and rear diffs.
Old 07-18-2017, 04:21 PM
  #9  
JK Enthusiast
 
jordy's Avatar
 
Join Date: Nov 2015
Location: Phoenix, AZ
Posts: 468
Received 18 Likes on 17 Posts
Default

If you put it in 4WD, you'll have an issue. No need to pull the driveshaft if you don't. It's not that difficult. 4WD = BAD. 2WD = GOOD.



Quick Reply: Mismatched Gear Ratio Question



All times are GMT -8. The time now is 08:46 PM.