U Joints n Driveshafts - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 02-17-2013, 05:55 PM   #1
RandomYJguy's Avatar
Join Date: Nov 2012
Location: LaCrosse WI
Posts: 263
U Joints n Driveshafts

Hey guys

had the jeep up in the air on a lift earlier today. The front drive shaft (from the case to the front axle) u joints are pretty much gone.

What my main question is, that drive shaft, is that constantly spinning when the jeep is in motion? Or is that shaft only engaged when the 4wd is being used?

RandomYJguy is offline   Quote
Old 02-17-2013, 06:04 PM   #2
Join Date: Feb 2013
Posts: 5
The front driveshaft disengages from the transfer case, the front driveshaft spins freely as the front wheels spin, but power is only applied to the FDS when 4WD is engaged.

Oso is offline   Quote
Old 02-17-2013, 06:04 PM   #3
Supporting Member

5-Year WF Supporting Member
jokerchief462's Avatar
Join Date: Apr 2012
Location: North Las Vegas
Posts: 10,068
Unless you are permanently locked the shaft shouldn't spin.
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.

AF Jeep Club Tail Number 184
jokerchief462 is offline   Quote
Old 02-17-2013, 06:47 PM   #4
Ianbeaulieu's Avatar
Join Date: Mar 2012
Location: San Antonio Texas
Posts: 1,451
Originally Posted by jokerchief462 View Post
Unless you are permanently locked the shaft shouldn't spin.
1987 YJ 4.2L I6 5-Speed, SOA, 1"shackle, Chrome Diff Cover Rear, Lime Green Under Parts
Ianbeaulieu is offline   Quote
Old 02-18-2013, 07:42 AM   #5
90DesertTanYJ's Avatar
Join Date: Jul 2012
Location: JAX, FL
Posts: 635
Best to check the front axle by lifting and spinning the RS tire to see if the DS turns. At least you will know if you either have a problem with your CAD system or the PO did the fork lock. My guess is you will find the fork modification done and the DS not balanced. Unbalance will contribute to Ujoint failure quicker than normal. Or it just may be time to replace them!
90DesertTanYJ is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 06:20 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC