CJ7 slack in the rear diff - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > CJ7 slack in the rear diff

FS: Jeep Fog Light LED Bulbs! Several Brightness Options! Clayton Off Road JK Short Arm Suspension Kits~Artec JK 1 TON SWAP~

Unread 03-30-2010, 01:05 AM   #1
Registered User
1985 CJ7 
Join Date: Mar 2010
Location: Southern IN
Posts: 5
CJ7 slack in the rear diff

I'd like some advice on diagnosing slack in the rear differential of my 1985 CJ7 with the stock AMC 20 and 2.73 gearing. When moving through the gears, the driveline very noticeably clunks as the torque on it changes. When parked, I can grasp the rear driveshaft and turn it; there is about an inch of play. I was wondering if anybody could guess what was worn out (ring/pinion, differential, axles...). There is a locker in the rear and one-piece axles, but I don't know any details on these mods as they were done by previous owners.

rex_altitudo is offline   Reply With Quote
Unread 03-30-2010, 03:38 AM   #2
Real Jeeps have dents.
CJ7-Tim's Avatar
2000 XJ Cherokee 
Join Date: Apr 2002
Location: out in the garage - Minneapolis, Minnesota
Posts: 21,655
The ring and pinion may be worn a bit, but you are describing the normal behavior of a locker. Practice your shifting or remove the locker. Double check that the u-joints are not worn out.

Between 2009 when Obama took office, and 2013, median annual household incomes have fallen by more than $2,100.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ......

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
CJ7-Tim is offline   Reply With Quote

amc 20 , differential , rear differential , rear end , rearend
Thread Tools

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.