dude- that tailgate is the weak spot on all first gen 4rs- its hard to find an intact one anywheres it snows. It will rust out quick. Check your rubber seal, but more important, take off the access panel on the back of the t-gate and see what condition things are in. Spray some WD40 on everything- check for drain holes and make some if they aint there. I had big tailgate problems- lots of others have to.
A word to the wise guy....