Had fluid toped off and it still pops out of 4th gear.
Aug 10, 2021 at 4:17 AM
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MASTER ASE TECH
CAR REPAIR CONTRIBUTOR
82 POSTS
Hi, I'm Dan.
It sounds like it is most likely an internal issue inside the transmission. Something like a worn shift fork or detent ball. I've attached a form from Toyota that shows the likely areas to check. I've also attached an exploded view of the transmissions internal shifting mechanisms.