Installation of a PML Deep Transmission Pan

On my 2021 TRD ORP I changed out the factory transmission pan to a PML deep transmission pan.

Parts:
• PML Transmission pan - Part Number: 11112 (Toyota A750E/A750F deep transmission pan – powder coated)
• Toyota transmission filter, O-Ring and Pan Gasket Part Numbers: 35330-60050, 90301-31014, 35168-60010
• Two 4-liter jugs Ravenol ATF Fluid T-WS
• Anti-seize (for the new pans Gold Plug magnetic drain plug)
• Thread sealant (for the new pans level check hole)
• Blue Loctite 242 (for the new transmission pan bolts)

Tools:
• Various socket wrenches
• 24mm socket for factory transmission fill plug
• 10mm socket for factory transmission pan bolts
• 5mm hex socket for PML transmission pan bolts
• Torque wrench
• OBD-II scanner
• Infrared Thermometer Gun
• Brake cleaner
• Transmission oil recycling jug
• Fluid pump
• Lots of paper towels

Start to finish a little less than 3 hours.

Casualties: two small burns from the catalytic converter by the factory transmission fill plug, transmission fluid drippage on my face and a drop or two in my eye.

Biggest surprise: how dark the Toyota WS fluid was, the metal flakes in the original filter and the amount of clutch material in the pan. (See Pictures). The OBD-II scanner reading 113 degrees while the infrared thermometer gun reading 104 degrees across most of the new pan. (Both within Toyota’s spec range).

Hardest part: trying to hold the new PML pan up with my noodle arms while getting a couple of starter bolts in. (Hind sight - would have best to have a buddy)

About 3 quarts drained out of the factory drain plug and when I dropped the pan, I was a bit surprised to find about a quart still in the pan.

I refilled the new pan from the factory fill hole adding 6 quarts of the Ravenol ATF before the fluid started to run out of the new pans level check hole. I then ran the truck and followed standard Toyota procedures. Reopening the level check hole, I needed about a third of a quart then did the procedure again. This time a small amount of fluid ran out. All in I gained +2 quarts of capacity. On my 5k motor oil change I’ll drain out ~2.2 quarts of trans fluid and refill with what I have left over.

 

Cool. That’s a lot of pan! Seems like aftermarket skid plates would be able accommodate it. This is a toyota part? What’s it off of?

 

PML is an aftermarket manufacture of deep transmission pans. Yes this should accommodated most skid plates.
Here is the link to the PML A750E/A750F pan: https://yourcovers.com/pml-toyota-a750e-a750f-deep-transmission-pan.html

 

Cool mod, I may have missed it, but is there an fluid pickup extension to account for the deeper pan?

 

According to PML the fluid level in the pan is exactly the same as the stock pan so the factory pick-up and filter functions the same. This is consistence with other deep transmission pans that I have installed from MAG-HYTEC & aFe Power for Ford and Chevy transmissions - they also did not come with any pick-up extensions.

 

Cool thanks,

so the advantage is having more fluid capacity which could lower fluid temperatures?

This sounds similar to race cars that have extended oil pans.

 

Trying to match the same environmental's as the readings before the swap out - my scanner is now reading over a 10 degree drop in the transmission fluid temperature readings from both of the transmission fluid temperature sensors.

About 30 mins of local in town stop and go driving with the A/C on Max and the truck in 4WD hi, out side temp was 88 degrees.
Stock transmission pan: Coolant temp: 192 / Engine oil temp: 162 / A/T Oil temp 1: 168 / A/T Oil temp 2: 177
PML transmission pan: Coolant temp: 191 / Engine oil temp: 161 / A/T Oil temp 1: 156 / A/T Oil temp 2: 166

I would attribute the drop in temperatures more to the fact that the PML pan has much more mass, has cooling fins and is effectively a large heat sink compared to the stock pan.

I don't believe that adding the additional 2 quart's of capacity would have much of an effect on cooling the fluid but I do think the additional capacity helps extend the life of the fluid.