Transmission oil change

Pulling it down 30 degrees is pretty good. I getcha on the don’t need it. But you know tinkering, restoring, hotrodding, and modifying is an uncureable disease that never stops until death. Lol!

 

Transmission cooler on my truck is mounted under the transmission have never cleaned it and it's been under my truck since 1997..

 

Last truck I drove had one under sleeper. Was dented all up and basically completely covered in oil and dirt. Replaced it with new one. Didnt cool one bit better

 

Definitely synthetic. No question there. If you're temp isn't rising over 150°f as you say, you can run without it. Mine was in front of the condensor, in front of the air-to-air, in front of the rad. Surprised anything gets any air up there. But it got significantly damaged by wildlife and my mechanic threw it out. In the heat of summer I'm finding that I'm routinely hitting 200°f in steep hills and will be replacing mine soon.

 

Same here. The FL dealer here always seems to have the better prices on that kind of stuff. I get Mobil 1 for the diffs from them too. For the longest time they were the cheapest price on Rotella but ever since they went 100% Detroit on the heavy or Mercedes on the medium duty trucks they don’t stock much of it anymore.

 

I know I'm a little late to the game but how many gallons should I need for an Eaton 18? I'll be using the synthetic as well. Is there any reason to use the Lucas Slippery Juice?

My research tells me 3.5 gallons. Having never changed tranny oil, it doesn't seem all that much given the size of this thing.

 

You used a gallon of what, sir? Lucas?