My 98 F150 is leaning 1 1/2" down on the drivers side. Any ides why, and whats the fix??

 

Mine was leaning when I bought it. The dealer adjusted the torsion bars; mechanic said there are different settings for different tire sizes. Previous owner had changed sizes but didn't have the bars adjusted.

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97 150 SC 4x4, 4.6, 3.55, 265/75R16, 1st Ford truck; bought 4-00 with 55500 miles

Added: Ford running boards, Ford molded mud guards (f&r), Class IV receiver, Delta Truk Pockit toolbox, Dupli-Color roll-on liner on bed front & sides, Bed mat, Ventshade Stepshields

 

FL98....

My 98 Explorer leaned and my new F150 SuperCrew leans. One thing in common is the location of the gas tanks on both vehicles is on the driver's side. I think that, in conjunction with the weight of the driver, will weaken the driver's side leaf spring. However, both of these vehicles were only 3/4 inch off versus your 1 1/2 inch sag.

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2001 F-150 SuperCrew, Lariat 4x2, Black w/gray leather, 5.4L Engine, Towing package (1.02" radiator)

Modifications: Gibson SideSwept Exhaust, K&N filtercharger w/modified cold air box, ******* lid, Bed Extender, Ventvisors, Hood deflector, Black Stull Billet Grille, Lightning Tails

Shopping List: Oil filter relocation, Front & Rear Swaybars, PermaCool Cool Pack II dual electric fans (available this summer)