HEMMT Fluid Specs

[Augdog1964]

Getting ready to do fluids on the HEMMTT...

Have Rotella T and/or Valvoline Blue for the engine... forget which...

But what do we need to put in the Tranny due to the wrong use of another fluid?

Mine came out of Texas... reportedly they were using the wrong fluids.

Thanks!

 

[JDToumanian]

For the transmission I used Allison's TranSynd TES-295, basically a red colored full synthetic ATF. Heavy truck dealerships sell it, I got mine at a Freightliner dealer, it was the best price I found at about $43 a gallon.

I would have liked to flush out the old transmission oil from the torque converter, hoses, and oil cooler... By removing the return line from the oil cooler which gets hot oil right out of the TC, and then starting the engine and letting it pump into a bucket until clean red oil came through, but pressed for time on the recovery trip in Louisiana and looking at how hard the hoses were to reach, I didn't do it. So I'm going to change my trans oil again soon.

The most important things about the engine oil are that it should be CF-2 rated for 2-strokes (not CJ-4 or whatever the current rating is for 4-stroke oils) and be straight 40 weight. Most popular brands offer it, Chevron DELO, Shell Rotella, Texaco Ursa, Valvoline, etc... but it's not on the shelf around here... Available by special order only.

Jon