There are metal inserts in the track that accept the screws. Just slide them out when done. If you sell it you will need to supply them and they would rattle around if you leave them. You do need to loosen the track at the back right and left to remove the inserts. The rear track has to be...
I should add that the dealer (1st test drive) took the truck into their Service and after checking for anything obvious they switched tires with another Tacoma. Still had the vibes, so for me that absolved the tires/balance on the TH. I spoke to the sales guy today after I told them I'm...
By chance I posted something similar on TacoWorld a couple of days ago after a test drive in a 6ft bed TH. I took a 2nd one out and got similar results. One other poster has the same (also 6ft) and a couple of posters don't have the problem (5ft). A comment on other Taco's as well. It's only...