M923A2 5-ton transmission issues

[rsbillings]

My transmission is not shifting out of first gear (1-1) in my 1991 5-ton M923a2. For no apparent reason it will not shift out of 1st gear regardless of where the shifter is (e.g. 1-2 or 1-3 or 1-4). However, on one random day going down a hill in the field it shifted once to a higher gear. I was in 1-3. After I shut the truck off and restarted it, the same problem, it will not shift out of first gear and I can't go any faster than 5 mph. I need the truck to transport youth to & from our LRC & ropes courses in the field. Only 17,000 miles on the truck. I have 100 students coming out in 3 weeks and need the truck. Help please!

Roger
USA retired

 

[simp5782]

Does it shift thru any gears other than first if you put the transfer case in low range? Reverse is working I assume? Fluid is at the correct level, color and odor?

 

[snowtrac nome]

Sounds like a governor problem. as I remember its an easy external fix

 

[CARMAN]

Drop the pan. Look for pieces. I lost reverse this summer at the Graves Mtn. Rally. Could not figure out anything till I dropped the pan. That's where i found reverse. 16K miles and 1000 after RR rebuild. Got to put in a new trans this summer. OUCH!!

 

[simp5782]

I've got one now to work on it has reverse and It has 1 high forward gear

 

[74M35A2]

I also go with governor, and easy external fix. Happened on my Ford Temp in college. Trans was fine then suddenly would not shift out of first gear. Reverse OK, other gears OK just prior. Pulled governor from under small round cover of trans, externally, no pan drop. Simple flyweight device with internal slide post. You should be able to move its few parts easily their full travel. Mine wore burrs on one the flyweights. I filed them off, dropped it back in, and it was fixed! All in the street in front of my house. Perfect. Held for another 80,000 miles.

 

[rsbillings]

Sorry it took so long to get back with you. The 5-ton is in the field and I couldn't get time off until Sunday. First - the last time I drove it, it did go into reverse. Second - no matter what gear I put it in, it only went 5 mph (stuck in 1-1 I believe). I was going to test drive it again, but I noticed fuel leaking out of the fuel filter - a first time event (FF834 located by the red by throttle and I'm not sure why it is leaking). Third, the transmission fluid is in fact low and it looks and smells good. On the dip stick, the level was at the fill/cold line. I will put more transmission fluid in it this week. Not sure how to judge how much it needs though. Any help with this or fuel filter issue will be appreciated - of course.