Thread: Will I need a rebuild or new transmission?

Well, if I were in your shoes I would just ride it out for now. And see how the transmission acts. If it continues to shift hard, I would use some SeaFoam tranny additive and go from there.

This is just FYI. The #1 problem I see written about concerning tranny fluid changes is if the shop screws up anything it will most likely be a low fill. I think maybe the Trannyman explained this before; it has something to do with noobs running the fluid change out machine incorrectly. So for everyone I highly suggest always checking the tranny fluid level yourself after any work. I would do it right at the shop before driving it anywhere.

I would try disconnecting the battery for a few hours and drive the car very easy afterwards. This will let the transmission relearn all the parameters. Not sure if this will help or not, but it can't hurt to try.

And as long as the tranny is shifting and still running, just drive it.

When a transmission is low on fluid, it doesn't work. Fluid is what makes a transmission apply the clutches etc. Wtihout enough you won't move. The trans shouldn't lock up... you should simply notice slipping.

Since you don't mention any slipping, my question is... how low was the fluid? Oil change people will tell you anything they can to sell you a friggin air filter. I trust them less than someone I know to be shady.

Harsh shifting in these transmissions is commonly caused by a failing EPC soleniod. Aka the pressure solenoid. Most likely you've been experiencing it getting fickle and now it is happening more frequently.