Coolant in transmission

I had a mechanic rinse mine out with diesel once
the important part i think is 2-3 changes to get all the old fluid gone
coolant is nasty stuff in the wrong place

 

You can call a truck dealership and they will give you the official eaton flush procedure, I worked at Freightliner and they did a recall and changed out the oil to water coolers with the air to oil coolers. You change out the cooler then drain and fill with ATF dex 3. run it at 1200 RPM for 1/2 hour, then do it again. Blow out the air to oil cooler, and fill with 50W synthetic. Be sure you plumb the cooler with the oil in the bottom of the cooler and out the top.
I am sure if you go to a dealer they will print off the procedure, and if you go to the dealer for you truck they will have the exact plumbing and parts list available.
Just a thought!

 

eaton sells rubber blocks that you can slide in between the tubes and then tighten the bolt that goes in the hole in the rubber block to make them swell up for a snug fit. be careful with the cooler when you screw in the fittings or tighten the rubber blocks. it doesn't take much to distort the tubes or the ends where the fittings go in.

 

I had a case of HIA I was thinking of the eatons I have seen metric on the bottom with the coolant hoses that run directly in the bottom, back of the case. If I had read you said you had the heat exchanger on the top right. I knew that the 13 and 18 weren't set up like what came to mind.

 

I changed mine to an air cooler, but am seriously thinking of changing back. The coolant hear exchanger also works as a warmer. In the winter time the tranny temps stay cold. So cold the needle on the gauge doesn't move. I honestly don't think that hurts anything, but has to be harder for those gears to spin so might impact fuel mileage. Any opinion on this woreout?

 

Quicker warm ups and even oil temp is the heat exchangers function. I can sure see the advantages to leaving it in tact. But it's hard to argue with time tested data of had it unhooked for 100000 miles with no effects. Thicker oil is harder to pump for sure. Splash is less too which means less oil on some parts. So I guess it comes down to which way do you want to gamble lol

 

I think they are especially with higher horsepower engines. I have a friend that took his off because he was in a hurry putting his wet kit on, hadn't had problems yet. Summer is coming thou.