yo J,
Is this happening in Both 2 wheel and in 4 wheel drive?
Do you have manual shiftr or Electric Touch Drive?
Manual or Auto Hubs?
For troubleshooting see;
http://www.diesel-dave.com/vehic/manual/stj/stjb0003.htm
some Excerpts;
•Wanders Side to Side — Loose Steering
•Vehicle overloaded or unevenly loaded.
•CORRECT as required.
•Improper (mismatched) tires and wheels.
•INSTALL correct tire and wheel combination. REFER to Section 04-04.
•Improper tire pressure.
•ADJUST air pressure in tires.
•Loose steering gear mounting.
•ADJUST to 73-89 Nm (54-66 lb-ft).
•Front and rear suspension components loose, worn or exhibit damaged condition.
•TIGHTEN or REPLACE as necessary. REFER to Group 04.
•Loose, worn or damaged steering sector shaft arm drag link.
•TIGHTEN or REPLACE as necessary. REFER to Section 11-03.
•Loose wheel lug nuts.
•TIGHTEN to specifications.
•Spindle pin (king pin) binding.
•LUBRICATE suspension. REFER to Group 04.
•Improperly adjusted front wheel bearing.
•ADJUST to specification.
•Steering column intermediate shaft coupling fractured.
•REPLACE as required.
•Incorrect toe setting.
•SET to specifications. REFER to Section 00-04.
•Improperly adjusted steering gear.
•ADJUST to specification (meshload only). REFER to Section 11-02B or Section 11-02D.
•Steering column misaligned.
•REFER to Section 11-04.
•Steering column components loose or exhibit excessive play.
•REPAIR as required.
•Pulls to One Side
•Improperly sized tires.
•INSTALL correct tire and wheel combination.
•Improper tire pressure.
•ADJUST air pressure in tire. REFER to Section 04-04.
•Unevenly loaded vehicle.
•CORRECT as required.
•Improper brake operation or adjustment.
•INSPECT, ADJUST and CORRECT as required. REFER to Group 06.
•Improperly adjusted front wheel bearing, or worn or damaged rear wheel bearing.
•ADJUST or REPLACE as required. REFER to Group 05.
•Broken or sagging front spring and/or rear spring.
•INSPECT and REPLACE as required. REFER to Group 04 and Group 05.
•Loose steering gear mountings.
•TIGHTEN to specification.REFER to Section 11-02B or Section 11-02D.
•Loose, worn or damaged steering sector shaft arm drag link.
•TIGHTEN and REPLACE as required. REFER to Section 11-03.
•Bent front wheel spindle.
•INSPECT and REPLACE as required.
•Bent rear axle housing and/or loose rear spring, shock absorber and suspension arm attaching points.
•INSPECT, TIGHTEN and REPLACE as required. REFER to Group 04.
•Frame or underbody out of alignment.
•CORRECT as required. REFER to Section 02-01.
•Misaligned front wheel.
•SET to specification. REFER to Section 04-00.
•Belts on tires misaligned.
•REPLACE as required. REFER to Section 04-04.
•Steering gear valve binding or out of balance.
•CLEAN and REPLACE as necessary. REFER to Section 11-02B or Section 11-02D.
•GO to Pinpoint Test C.