I have an '06 LJ Rubicon. I recently had it regeared from stock to 5:38 Revolution gears. 42RLE auto trans on 3.5" suspension lift, 1" body lift and new 35x12.5/15 Cooper SST Pro tires. I have a severe vibration starting at about 50 mph and beyond thru 70 mph. There is also a vibration while in Park or neutral sitting still while increasing the RPM range up and through 2500 rpm's. Any help would be HUGELY appreciated!
Highway vibration after re-gear
- Thread starter Old Rocker
- Start date
The issue of vibrations after regear is a common complaint. Here are a couple threads that discuss the issue.
https://wranglertjforum.com/threads...ler-tj-vibrations-after-re-gear-thread.32445/
https://wranglertjforum.com/threads/re-geared-now-i-have-a-vibration-above-50-mph.4235/
https://wranglertjforum.com/threads...ler-tj-vibrations-after-re-gear-thread.32445/
https://wranglertjforum.com/threads/re-geared-now-i-have-a-vibration-above-50-mph.4235/
After regearing ours my worst vibration was the front driveshaft . Took it out , drove and it was mostly smooth . I installed new Tom Woods driveshafts front and rear and that fixed my severe vibration . I do have a slight vibration when revving up in park and neutral that I can also feel when driving . I haven't found the source yet , but I did hear a little rattling that I believe was inside a catalytic converter . I changed all the converters in 2014 with Mopar replacements , but it sounds like one has a little rattling now . Last time they stopped up so I installed the complete exhaust system .
When I get time I'll try to track down this vibration . Sometimes It seems like it is in the transmission .
When I get time I'll try to track down this vibration . Sometimes It seems like it is in the transmission .
I think it's a different issue as he still has the vibes while in park or neutral. I'd check the motor and transmission mounts first before anything.
I replaced the motor and trans mount with OEM rubber parts. The driveshafts have both been rebuilt and balanced by a local Phoenix shop I was told was reputable...although I'm not sure at this point about that.
What body lift was used? My TJ had a 1" Daystar body lift (all poly) that transmitted vibes bad when stationary. Removing it and replacing with Crown OEM style body mounts + BMB 1.25" BL made a huge improvement - to where they're just barely noticable.
LONGJP2
TJ Expert
No vibration before the re-gear. At the time of the re-gear I added the new Cooper 35x12.50/15 SST Pro tires. Prior was 33" and stock 4:10 Rubicon.
you may wanna try changing the tires (ask a friend to borrow his tires for a ride) and see if the tires are causing the vibration between 50-70 mph.... I mean... you may wanna start discarding one thing at a time....