um, my truck was squeaking too... spent about 2 weeks looking for it when it finally dawned on me to check the bed bolts. and BAM thats what it was. Hope that helps!

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93 ranger ext. cab 4.0L auto 6" SJ/custom lift--37" super swamper truxs M/T tires--lock rite locker w/ 4.56 gears up front--warn hubs--exploder 8.8 w/ disc brakes 4.56 gears and detriot locker--one-piece driveline--bushwacker cut-out flares--Bilstein 5150 shocks--2 10" xcite subs w/ 1600W Crunch amp-- tinted windows

waiting for: dual steering stabilizer, put on 3" body lift(in my room), dual shock setup, electric fan, possible SAS with a waggy D44