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Did a search but didn't find anything pertaining to my specific problem........long story short, did oil change and fuel filter/water separator change this weekend. Hadn't run truck in 3 weeks, installed new FF/water separator, primed fuel system and engine wouldn't start. Eventually fired but...

What is the R and L switch on the drivers side of the cab on the floor between the door and the seat?? Is that the actual fuel tank switch from R to L and the switch on the dshi is just the gauge switch?? I can get some pics tonite if anyone is confused on what switch I'm trying to...

So with the outrageous price tag on the rebuild of my MT645CR that was internally destroyed from heat and previous owner abuse, I am interested in researching a manual transmission conversion. Has anyone done it? If so, what transmission did you use and wht price range did you spend to do it...

So, basically out of the blue, the transmission is not shifting into any of the forward gears. Truck had been running fine last weekend, went to go to pull it out to wash it up today and no go. Weird thing is, it goes into reverse just fine but then switching to 1-5 or any other gear set, it...

What temperature should the Allison 5 speeds in these trucks typically run at?? Either my gauge is wrong or 250-275 is normal. I bought the truck not too long ago and did a full maintenance job on it. Cooling system was very corroded from the previous owner running straight water. Trans...

So I am hoping you guys can help me out.....new to the site still and new to recently purchased '84 M923A1. I have done a search and couldn't find much but I did see a thread that had this subject going but it had no more replies. I just can't get my truck to shift into low range at all. The...

So I have been servicing my 84 M923 is bought and got to the fuel filter today.....not too happy about it. Check out the pics I attached but I guess I'm gonna try n clean up the canister as best I can and run it. Any suggestions?? Should I bite the bullet and look for a new canister?? Thanks...

So what kind of grease do u guys use on your 5 tons?? I did a search n couldn't find much, and the TMs just issue a MIL number which I have no idea what type it is, just don't wanna mix as that can be bad which I'm sure most are aware. Do u guys use the same for bushings and ball joints as u...