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Transmission Dead? No Drive gears

Discussion in 'Tundras' started by Roberts, Jul 7, 2020.

  1. Jul 7, 2020 at 10:56 PM
    #1
    Roberts

    #1
    Roberts [OP] New Member

    Joined:
    Jul 7, 2020
    Member:
    #333760
    Messages:
    1
    Gender:
    Male
    Background :

    2013 Tundra 4.6L RWD A760e 6 speed transmission. 140K. The truck has never had any transmission issues before this. Started getting code "P0418 Secondary Air Injection System Relay A Malfunction" a few weeks prior but I don't see a correlation between the two systems.

    Failure :

    I changed the performed a drain and fill plus filter replacement. I drained about 2.5qts out of the pan. Replaced approx the same (the first time). First run and shifting was sluggish with the truck jerking into gear. Drove a mile or two (slow and steady) and it cleared up. Parked it but the next day now I had no forward gears. Reverse only.

    During the maintenance I put the truck in Fluid Temp Check Mode and I am fairly certain I have the correct fluid level. Especially now that I have dropped the pan at least 6 times for troubleshooting.

    Troubleshooting so far :

    After the first "test run" I pulled codes P0761 and P2714 and P2757. All solenoid related codes. I then drained the pan a second time and pulled all 9 solenoids and bench tested with 12V. All actuated properly. All Ohm'd out to spec. I disassembled the valve body, cleaned and rebuilt.


    No change, still only have Reverse. No forward gears. There was no shrapnel in the pan that would point to mechanical failure. I still suspect pressure or electrical/electronic related but am at a loss as how to proceed.
     
    Roberts, Jul 7, 2020
    #1
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