Feb 7, 2024 · This thread, and the one below, covers the M939 family of Trucks. TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL) TRUCK, CARGO: 5-TON...

Dec 27, 2016 · Stewart & Stevenson made oilfield trucks, generators and big airfield snowblower trucks. So they knew how to make stuff. All of the military trucks seem to have some issues. M939 t-case low range reverse, 800 series sprag, theres always something.

Mar 21, 2020 · A place to discuss the M939 series trucks.

Jun 15, 2015 · I got what was supposed to be an air dryer from an MRAP. It has a governor built in. Has anyone tried to retrofit it onto a M939 truck? If so what did you do about the connections?

Jul 23, 2018 · Hello all. I am new to this military truck game and I have a few questions about the 939 series 5 tons. I have briefly searched this forum for these answers but I could not find any clear cut numbers. I was wondering about their hauling capacities and towing capacities with both the cargo and...

Dec 10, 2006 · The M939 series 5 Ton trucks do in fact have a transfer case design flaw. As the manual and dash plate state, you can't back up in low range; if you do back up in low range you risk cracking the transfer case.

Oct 24, 2013 · New to M939 and looking in the TM they say to use OE/HDO 10 for Power Steering and OE/HDO 10 for the Trans (per Lube Order) but OE/HDO 15/40 per TM. My question is what is OE/HDO 10 and OE/HDO 15/40? What brand of power steering fluid is correct and what brand of auto trans is correct?

Jan 5, 2025 · I was skimming an old military vehicle publication circa 1997 and found an interesting truck. It appears there was consideration to remanufacture the 5 ton trucks like they did the M35A2 -> M35A3 ESP (Extended Service Program). The blurb says it has the same Cat 3116 and Allison 1545 as the...

Feb 17, 2010 · The M939 truck was introduced in 1983. It's a general-purpose military vehicle, primarily designed for tactical, off-road use, with a top speed of 65 mph and an automatic transmission.

Jun 16, 2012 · I have been looking for the actual schematic for the rear wiring harness on a m939 truck for about 2 days now. Maybe I am loosing my mind, but I can not seem to find it in the TM's. I thought this should be in the Organizational level …