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Original Poster, 86m1028, why did you delete most of your posts? Did you figure out the issue? If so we'd love to know what you found was wrong and what the cure was. I'll save you any embarrassment by quoting my father. "I'm not smarter than you, I've just lived longer and seen more...

Welder1 has identified the issue and if I had good search abilities I'd link a post of the thread member Gringletaube posted some good pictures on. Since I'm unable, you basically need to remove the spring spacers from the top of the axle. Unbolt the U bolts that secure the axle to the leaf...

Piggybacking off of what Swamp posted, install the driveshafts to the transfer case. Start truck, build air pressure, release parking brake and shift into gear ready to give some throttle if necessary. The torque convertor shouldn't be locked at all in first gear, it shouldn't lock in until...

Well perhaps it does in limited observation. My current 5 ton has one of these engines and the Cummins NHC-250 started serving the military with the introduction of the XM809 series in the late 1960's. It was a Commercial Off The Shelf drop in that met the requirements. The Military doesn't...

Events like the Aberdeen event (I've never been to it) and the Georgia Rally (I've been to 8) rise and fall. Last year I believe we had 100 or so trucks and quite a crowd. The year before 115, year before that 130. Most of the people who were there in the 2 years I met in the Horse pasture...

Reading through your signature, is this the M923A2 that you converted into a M925A2? Back when the Army still used M936 Wreckers we'd play tricks on new guys and engage the power take off when parking the truck. We'd know if they checked the truck over pretty quickly if we heard a bang and the...

I've read on here that the button on the transfer case shifter can cause this behavior. I'm trying to sort it out in my head as to what it does. Common logic would say that it disengages the torque convertor to allow easier shifting from high to low on the transfer case but I think it does the...

The first tank you are closing off is the wet tank. Each successive tank has a check valve as well which will help you to identify what is leaking. Start by opening the wet tank valve that you closed to build air. Trace the line to the next tank up and repeat your test. If successful, open...

I'm in, Old Glory flying high will propel this 5 ton to Victory!

Can you drive through it and see if it smooth's back out? My truck used to have a bad hop at 46-48 mph (923 on 14's) and I simply drove through it for a while. I finally got tired of it and lowered the air pressure to about 20 psi all around and drove with some noticeable sidewall sag at 15...

Simp is great to hang with! Be prepared to be an expert of backing towed loads within an inch left or right and helping dig deep holes to help with loading! I'm being silly, Wes has picked up stuff from my front yard from time to time. I don't think many have put as much effort into keeping...

Pull the axle cap bolts on both sides of the axle and attempt to turn one side if you don't have the capability to lift the tires off the ground. If it turns, you have open differentials.

Oil leaks are scary until you consider how much oil is in these trucks. Different model entirely but my M923 had a sudden oil leak from the front drive that rides the belts to the fan and sprays oil everywhere under the hood. I worried about smoking the engine until an engineer friend of mine...

This picture is awesome and was taken prior to the trail ride to the Memorial Service. Briggs knew going up from Leesburg that we were paying Respects to a lost friend and was still cheerful. We made it home Safely and I asked Briggs why he seemed so happy and carefree in the picture. He told...

I agree that that the C12 in the MK-36 Wrecker is much more powerful but I've used the C7 power in a M1089A1P2 quite a few times and it does better than you might think. I've lift towed quite a few MTV's and can still run on the governor at 62 MPH. with the transfer to forward most rear axle...

Since you have a CDL you know what to look for. Porkysplace gave some good advice of getting familiar with the Tech Manuals. Does it pass basic checks described in the PMCS (Preventative Maintenance Checks and Services) section. Oil in the engine and transmission, radiator surge tank full...

I think a precedent was set in this thread pretty quickly based upon poor choice of words, spelling and perhaps dis-information by the OP. I don't know anything about the guy but it started out rather confusing as to what the issue was other than the truck struggles in hills.

Maybe a picture of the oil pan of the transmission would clear that up. The TH-400 in these trucks doesn't have a locking converter so it'd still be 1 to 1 output minus converter loss either way. I agree that once the 14 bolt goes in, 55 mph. would be the top speed for all practical purposes...

To start with, HMMWV Injection Pump NSN's. 2910-01-199-2355 6.2 Prior to 1990 2910-01-326-9221 6.2 after 1990 2910-01-467-9029 6.5 N/A Detuned (what I used) 2910-01-414-1272 6.5 Turbo Now I have to go research again where I got the rest of the information. I did the injection pump swap in...

Mostly correct, I replaced the injection pump from my 6.2L N/A CUCV with that of a 6.5L N/A HMMWV pump. The primary difference from what I researched is the 6.5L N/A pump has 0.310 pumping plungers versus 0.290 pumping plungers for the 6.2L N/A pump. The 6.5 N/A pump is tuned to produce 170...