Transmission slipping

That is your torque converter locking and unlocking. Completely normal.

 

Good to know, I can sleep better tonight!

 

These tacoma trans run by computer. They can be recalibrate to shift better. Chances are the dealer already has new maps for the trans and can recalibrate the shift points. Its not slipping

 

chances are they did not do it correctly. I had similar problem, my guess is some moron drained transmission instead of engine during oil change at dealership.
I paid dealership to do tranny oil change and level check. When I got vehicle back it was still having issue. So I lifted truck and did my own tranny fill and drain. Turns out it was 2qt. short from dealership. After getting all air out, tranny is smooth as butter.
check level again, I bet you it's low on fluid.

 

Exactly, I t may be a failing trans, but I would ensure it before replacing. The trans fluid check is not difficult to accomplish properly , but easy to do wrong. If the op did his own work and knows it is correct my apologies. But if he had it done by a shop or dealer, I would double check it.

PK

 

Yes, when I was at the dealership us transmission full-techs were a valuable commodity. Not many people are willing to dig inside there. I loved it myself. As for the cost, we had a "cost effectiveness" scale that we used. If the cost of what we expected to have to do for a rebuild was 75% of the cost of a replacement unit, then we would recommend replacing. When I was with GM, it would be very easy for the 4L60-E automatic to have a repair cost that would approach 90% of a replacement cost. It was simple math. That plus if the transmission were rebuilt, and DID fail, it would be the dealership that has to warranty the repair. If we installed a replacement unit, then the warranty for failure was GM's baby.

Dealerships do not have access to ANY of the internal codes or mapping. All the dealership can do is load up whatever the latest programming that is already put together by the manufacturer. We can't read or touch the code. If we were to do any type of aftermarket program adaptation it would void the factory warranty.