Cat 735 rock truck issue loosing all gears

[Kels306]

I've got a cat truck serial number CAT00735TB1N01044 it's a 2008 , has a reman transmission in it , when brought back out to site the operator can drive it for a few hours then once put into neutral it will loose all gears , once it sits for a while it will go and work for a few more. Hours ,it will just read neutral for all gears with the selector

 

[Mobiltech]

Have you got ET on it.
If the dash reads neutral sounds like electrical issue either shift control or ecm.

 

[Kels306]

Have you got ET on it.
If the dash reads neutral sounds like electrical issue either shift control or ecm.

700 fm1 2 , the transmission sensor , thatll be under the cover on top of the tranny I believe, the only plug on it is on the side of it

 

[Nige]

700 fm1 2

Troubleshooting procedure attached. See where that gets you.

 

[Kels306]

That sensor is located inside the transmission cover ?

 

[Nige]

That sensor is located inside the transmission cover ?

It's actually a rotary position switch rather than a sensor, even though the procedure says it's a sensor.

Ref #20, mounted on the transmission control valve. They used to give trouble on rigid frame trucks, I'm sure they are no different on an ADT.

If you want a full electrical schematic for the machine just ask.

 

[Rehtaeh28]

Last week's hitch, my Two Bits while under a shovel, neutral,and park brake set. Began traveling in reverse when I have set her in first gear, released the service brake, and pressed the fuel pedal. The first time this happened I thought okay, what's going on. Stopped, reset park brake and neutral. Had to hear the shovel operator holler at me as though I did this on purpose. Placed the truck in gear again, released the brake, and she did it again. I quickly called in this issue to maintenance and dispatch. I was told this happens with low rpms? My load was 280tons, I wouldn't start off in any other gear, wouldn't that cause a stall? I'm so frustrated.