transmission question

[Bulldogg]

Hey was wondering if anyone else's 5ton truck does this? My M923A1 jerks hard when I slow down and stop at stop signed is this normal? Trans fluid is good and I let it warm up before driving it

 

[VPed]

Yeah, I get a good 2nd to 1st jolt on two different trucks.

 

[Squirt-Truck]

Converter lock-up sticking?

 

[Suprman]

You can try lowering the fluid pressure. The adjustment looks like a kick down cable as you adjust and make the cable longer it lowers the pressure. Also switching over to allison dex3 fluid helps.
Will

 

[engineer233]

My 936 does it bad stopping between second and first.

 

[armytruck63]

My M923 does this. I think it's normal just like the bump when a CUCV up shifts. Remember that you are running a big tuck empty.

 

[mcmullag]

it is kinda weird driving the truck around an urban area and you feel each upshift and then when coming to a stop light, each downshift. That would be interesting to see if it was smoother shifting if you had 5 tons in the cargo bed.

 

[plode]

My truck does this too. I recently had 6000lbs of mulch in the bed, and the 2-1 downshift/jerk wasn't any smoother then when the truck is unloaded.

 

[1 Patriot-of-many]

Yep normal IMO.

 

[Jeepsinker]

Normal. I've driven over 30 different 5 tons just this year and they all do it.

 

[Artisan]

This is real simple.


THEY ALL DO THAT! Why? Because they are a BEFFY transmission
in a tactical vehicle designed for MILITARY off road movements of HEAVY Equipment AMMO etc and
that it is designed to pull the weigh of the truck, it's payload PLUS a 15K trailer!
I dare you to add up all the weight a 5 ton is "rated" at, on AND off road!

Hello! That is a LOT of weight my friend ! No tranny will act NICE running close to empty
when designed to pull those numbers.

I said the same thing when I got mine THEN, I towed 7 trucks VERY similar to my
truck for a total of about 77 miles all uphill. It took the edge off that downshift
just a wee little bit.

Next add 6000 pounds+ to the bed and go for a drive and see how tame it feels.

Nope, nothing wrong, any attempts to "fix" a perfectly good tranny will surely
cause issues. Switch to Dex? NOPE ! Just USE IT and add a LOT of weight
in the back if you want cushie. (well, better said a little less brutal)

 

[quickfarms]

The first question is are you following the Allison drivers manual? They do not like being driven like a car.

For some reason the military does not set these up the way Allison recommends. A good Allison rebuilder can adjust the trans so it is very smooth. The bad news is on the mechanical transmissions it is better to set them up on the bench.

 

[davo727]

Im curious if the bobbed trucks ever skid the rear tires when the trans downshifts with the truck being lighter and only 2 rear tires on the ground.

 

[Ford Mechanic]

Anyone know the proper way to adjust/check the throttle valve cable on these trans? I'm fixing to install the updated throttle linkage and wanted to install it properly while I had it apart.


On a side note, what does your trans temp normally read when the trucks up to operating temp? Mine moves when the truck is turned on but not after that, stays 100-150. So I'm wondering if it's really running that cold, or the sender's shot......


Thanks! I couldn't find a mention of any of this in the manual.

 

[Ford Mechanic]

Bump.... No one's had any issues or need to check these things???? Or knows how hot they're trans normally runs?

Anyone know the proper way to adjust/check the throttle valve cable on these trans? I'm fixing to install the updated throttle linkage and wanted to install it properly while I had it apart.


On a side note, what does your trans temp normally read when the trucks up to operating temp? Mine moves when the truck is turned on but not after that, stays 100-150. So I'm wondering if it's really running that cold, or the sender's shot......


Thanks! I couldn't find a mention of any of this in the manual.

 

[MtnSnow]

Mine usually stays very cool and the only time I have seen mine at 185-190* is when I had run the truck on the highway for about 40 miles and it included a few hilly sections in 72* weather

 

[VPed]

Temperature - I haven't seen mine above 150 degrees. As for the shifting, it is an automatic transmission, meaning it does not mesh and un-mesh gears. It uses planetary reductions involving allowing something to turn or not allowing something to turn. That is done with clutches and bands. Slow application/release of the clutches does make for a smoother shift but also wears the clutch linings faster and builds heat. That is why they are set to shift the way they are. I pay good money to get my auto transmissions in my cars to shift quickly and firmly. There is no way I would want to go to smoother shifts with these trucks. IMO, if you want smooth, drive a Cadillac

 

[Vintage iron]

I only see it in my trucks when I stop quick. I always try to plan ahead on my stops and start slowing down before intersections. I noticed it is worse in A2 trucks too. I don't think the transmission was adjusted for the Cummins 8.3L