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At current point, I’ve logged 7000+ miles on 15w40 driving cross-country CA-GA, lots of trips offroad, city driving, some of which turned up with a custom 525hp 1600 torque tune, all with no issues to report as of yet (knock on wood) Sent from my iPhone using Tapatalk

If it’s an mtvr, the Marines use motor oil exclusively, at time of this writing they do not use ATF for any reason in their MTVRs The list provided above gives you some synthetic and non synthetic options, really and truly none of us will really rack up enough miles to make a big difference...

I’m going to pull a sample and send to black stone Sent from my iPhone using Tapatalk

This is thread is started and concerning the MTVR family of vehicles Sent from my iPhone using Tapatalk

Great point Ken, also a point to keep in mind for those that are unaware; transmission fluid starts to turn into carbon at sustained temps above 200, some may resist more than others but you’d be shocked at the temperature observed straight off the torque converter. Heat kills Sent from my...

MrMikey this is an article taken straight from Allison as of 2-2020. If it works, why change it? Our trucks aren’t like the m939 series that frequently had a improperly adjusted and/or rusty throttle cable controlling the transmission line pressure. Many changed to try to obtain smoother...

What I’m saying in short, stick to motor oil 100% of the time. There is zero reason to convert an MTVR to ATF Sent from my iPhone using Tapatalk

Hey guys, considering transmission fluid is a fiercely debated topic in the M939 and M35A3 trucks I figured I’d go ahead and start a thread concerning it for us. All MTVR variants current as of this posting utilize the Allison HD 4070P , a robust 7 speed automatic. Here is a list of Allison...