2012 4.6 liter transmission change

Hey Fellas, I was under my truck this morning looking around and noticed a small leak in my transmission pan gasket. Have been wanting to do a flush anyway, currently at 125 k, and now am convinced it’s time for a service. I wanted to drop pan, replace filter, replace gasket, and fill with new. Sounds easy enough. When I went to research, I ran across this document from Toyota, link down below, Toyota service bulletin TC009-07. The process for refilling to the proper level is SO complicated I don’t even trust the dealership to follow these directions. There are 2 separate processes for the same model year depending on tow package, disengage thermostat with a 1mm pin, ensure ac is off, lights, radio, etc.., engage brake pedal, shift slowly between gears then back to drive 1.5 second intervals while watching d shift indicator on combination meter....it goes on and on. They’ve literally made it so difficult I don’t trust the dealer techs do do all of this. What do you guys think? Should I trust the dealership to actually perform this service to the specs recommended by Toyota? Do I have any way of verifying it’s been performed correctly? Am I being paranoid? Any help feedback would be greatly appreciated. Thanks
https://tundraheadquarters.com/wp-content/uploads/2010/06/tundra-transmission-fluid-flush-tsb.pdf://tundraheadquarters.com/wp-content/uploads/2010/06/tundra-transmission-fluid-flush-tsb.pdf

 

Dealers do a drain and fill all the time.

I’ve done a drain and fill several times, but I use a phone app with an OBD Bluetooth adapter to monitor the fluid temp. There are plenty of threads on doing this.

However, the part you may have the most problems with is removing the pan. On a 5.7L transmission, the rear most pan bolts tend to gall and the head breaks off. Can’t say if that is true with 4.6L, but be forewarned. Two of mine broke but they were through bolts, so I just drilled them out and used a longer bolt with a nut. A few of the bolts are in blind holes, but they don’t tend to gall up as much. Some have soaked the top of the bolts over several days with various liquid wrench products, didn’t work for me.

Greg

 

Tis relevant to my interests...I have a 2012 4.6 with 106K miles that was used to haul a dump trailer for the first 92K miles by a contractor. HE has sinced moved onto a Ram 2500. He aslo added airbags to my truck, so I knew he worked it a little bit over that 7600lb tow rating.

 

I’m taking mine to the dealer for this one thanks for your reply

 

My dealer did cam seals 35k miles ago and a transmission fluid change 20k miles ago. No issues with either job. I only bring up the cam seals because if they can remove the top half of the motor and get it back together without any issue, changing a little oil isn’t anything for them.

 

OP, I think that is wise if your under warranty.

I'm not, and I think in this Fiscal environment I might trade in my DC on a newer Tundra Pro in concrete.

I might go over to the dark side an get an Ecoboost with the hugely upgraded interior, I dunno.

As fast as this economy deflates, opens up more opportunities to move into a 10-year truck, which for me, the Tundra has always been.