Can't Get Enough
Join Date: Sep 1999
Location: Cotopaxi, Colorado
Thanked 0 Times in 0 Posts
Re: Caster issue....different on one side from oth
I target 1/4 to 1/2 degree higher caster on the right side for road crown. It is adjustable. see TSB below.
SUBJECT: Front End Alignment - Adjustable/Offset Ball Joints
DATE: Aug. 20, 1999
This bulletin involves installing offset ball joints to allow adjustments to camber, which were not previously possible on XJ, TJ and ZJ models and to camber and caster which were not possible on WJ models.
This Technical Service Bulletin releases new offset ball joints which provide the capability to make front-end alignment adjustments to camber and caster. Camber adjustments and caster adjustments on some models are fixed and built into the front axle. Caster adjustments could be made in the past on TJ, XJ and ZJ models. These parts are only to be used in situations where a slight lead or drift to one side of the road or another is occurring with no driver input or where a customer indicates that constant driver input is required to maintain straight ahead steering. These parts will not effect situations where a lead or drift condition is present only under braking.
Verify matching original equipment tires and wheels
Inspect for any worn or damaged steering and front suspension components including wheel bearings
Verify Tire pressures
Inspect for tire condition and abnormal wear. Refer to section 22 of the appropriate service manual
Road test the vehicle.
Cross switch front tires. If the drift follows the tires refer the customer to the tire manufacturer.
Verify that there is no brake drag present and that the condition is present with the transmission in neutral
If no problems are found and the condition is present, perform the Repair Procedure.
Qty Part No. Description
AR 05014876AA Ball Joint - 0.5 degree
AR 05014877AA Ball Joint - 1.0 degree
AR 05016972AA Ball Joint - 1.5 degree
Four wheel alignment rack
Ball joint remover and installer tool - # 4212F
Set the vehicle up on the alignment rack and check the alignment against the specifications listed in the applicable service manual. The specifications shown below are specific targets, which will provide the optimum performance for the vehicles listed above. The only adjustments, which can be made with the original factory equipment, were caster, toe in and steering wheel center. 1999 and 2000 Grand Cherokee (WJ), caster adjustment was not provided. The new ball joints will offer adjustments of up to 1.5 degrees for camber and caster where required.
Alignment Specifications (Degrees)
WJ - WG
Angle Target Range Max. Rt. To Lt. Difference
Caster +6.35 +6.0 / +7.5 0.5
Note: With Up Country Suspension -Target caster at +6.5
Camber -0.3 -0.75 / 0 0.5
Toe +0.20 +0.14 / +0.26 0.06