Here are the symptoms and Its worrying me that this may cost a ton of money.
09 Taco 4cyl 2 wheel drive - standard pickup. Automatic 45,000 miles
When shfting from 3rd to 4th and 4th to overdrive, the truck is vibrating very badly. I assume there is an issue with the transmission. It also does it when downshifting as well. How bad is it? don't sugarcoat it.
It has been a phenomenal truck so far and this is my only issue. I just started happening.