Mine was similar, the little square plastic slider wasn't broken, it just slipped out of the track. It is easy to look at and feel around with your hand to see what the dealio is, in this same access panel you can look inside at the rails that the window slides on in the side of the tailgate but it is kind of difficult. Get some appropriate lube (whatever these more experienced folks recommend) dip your finger in and run it along the track. I too need to get some of this lube and do mine up nice and fancy.
1978 Ford Bronco Ranger XLT *The Green Machine* 351Mutant§35x12.5R15§3" Body lift§
1987 Ford Mustang GT§Drag Radials§5 speed§FAST!§PGM Leading The Washington Chapter With An Iron Fist! - Dylan
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