Surging , it doesn't surge in first or second but when you have verbal control on it will **** up and down when under a load , also when backing up if the machine is leaning to the right it will go left and vice versa. I have had the machine about 2 months 7,500 hours when I got it I changed all the fluids along with the final drive fluid ,it a as low.When not under a load it will sway right to left constantly but I can slap the shifter to the right when it tryst to go left and it will straight out
Update..... no surging anymore. But I tried another joystick and that was not the problem . When machine is cold reverse Is very slow until it gets warm. The more you use reverse the better it starts working. Could this be a A S valve or control valve?
It could depend on the temperature and weight of the oil. It's common for machines to be a little sluggish until the oil warms up.
I have absolutely no reverse now. The Transmission is not warming up above 25°C. I was throwing 3 Codes DLMOKX,DLM1KB and DLM2KB. So I replaced both speed sensors today didn't change anything. I have also replaced the HST filter and fluids. Before all of this I bought a used Palm shifter no difference so change it back to the original one.
When the weather was warm I had reverse but now that is cold I don't have anything. Can't get the transmission warm enough to make it work in reverse. Also I'm using T010 komatsu fluid and filters. I done a pump test forward it was good . It does great forward runs like a new one.
Did you ever fix this?