The vehicle in question is a 95 LWB Classic, but I decided to stick it here for more opinions.
The issue: something that manifests itself like a wheel shimmy.
Caveats: it comes and goes, and rarely if never - in a turn. Almost always - during straight-ahead driving.
Alignment - nearly perfect. The truck tracks and handles very, very well.
Panhard rod bushings: checked tight.
TREs: checked tight.
Wheel bearings: checked very tight.
Swivel ball preload: adjusted tighter.
Pitman arm play: checked, none.
Steering box bolts: checked tight.
Steering box play: checked, nearly none.
Steering shaft play: checked, nearly none.
It feels as if someone pounded in the bearing race into the hub crooked, and the wheel wobbles as it turns; Jimmy (jymmiejamz) rightly suggested checking the wheels for being straight - on the rim, they are within at least half a millimeter. No out-of-round on the XZL tires, either.
I should also mention - this truck had this shimmy when I bought it, three sets of wheels (two different sets of alloys and Wolf steelies) and tires (BFG A/T, some other all-terrains, Michelin LTX) ago. Balancing the tires does not eliminate it.
The vibration is considerable enough to wiggle the ABS sensors eventually. I can live with it, but it'll likely destroy something else.
Any ideas?
The issue: something that manifests itself like a wheel shimmy.
Caveats: it comes and goes, and rarely if never - in a turn. Almost always - during straight-ahead driving.
Alignment - nearly perfect. The truck tracks and handles very, very well.
Panhard rod bushings: checked tight.
TREs: checked tight.
Wheel bearings: checked very tight.
Swivel ball preload: adjusted tighter.
Pitman arm play: checked, none.
Steering box bolts: checked tight.
Steering box play: checked, nearly none.
Steering shaft play: checked, nearly none.
It feels as if someone pounded in the bearing race into the hub crooked, and the wheel wobbles as it turns; Jimmy (jymmiejamz) rightly suggested checking the wheels for being straight - on the rim, they are within at least half a millimeter. No out-of-round on the XZL tires, either.
I should also mention - this truck had this shimmy when I bought it, three sets of wheels (two different sets of alloys and Wolf steelies) and tires (BFG A/T, some other all-terrains, Michelin LTX) ago. Balancing the tires does not eliminate it.
The vibration is considerable enough to wiggle the ABS sensors eventually. I can live with it, but it'll likely destroy something else.
Any ideas?