2014 Transmission Problem

2014 Tundra, just over 300k miles. If I drive it right away in the morning, it won’t shift right (seems to hang up around 2nd or 3rd). But if I let it idle for 10+ minutes before driving, it usually shifts fine the rest of the day.

Computer showed a bad transmission solenoid, so I replaced that — no change. Also replaced the 2 speed sensors on the outside of the transmission, still the same issue.

Anyone run into this before or know what else I should check?

 

300k miles… she’s tired, boss.

What is the fluid service history?


https://www.sonnax.com/tech_resourc...aults-in-a761-ab60-a960-6-speed-transmissions

 

The ab60 valve bodies don't seal wellcas they get miles on them. If the fluid isn't changed every 30-60k it send a lot of clutch debri into the valve body. It causes a lot of wear and it can't hold line pressure leading to clutch slippage, solenoid wear and accumulator wear.