Damn dealer service tech idiots that can't even read. 9 months ago got a 150k "change all my fluids" service to reset the clock on everything. Just long enough later that I didn't think it was related, started getting a low speed vibration on the truck, mostly when turning like pulling out of the driveway. Been annoying trying to figure it out. Wheel bearing? U-Joints? Something even more expensive and pain in the ass?

Took a chance today and completely redrained and filled the rear diff, making sure to use the right oil. And it's now running smooth as silk again.

Seems that when they changed out the oil in the rear differential, the dealer service tech didn't know that my Tacoma Sport came with a limited slip differential, and needed the friction modifier added, even though they work on how many Tacomas each day? I mean, the big f*cking sticker about an inch away from the fill hole, only tells them the right stuff to use even.