We have a 2006 650j, runs great, but about 3 or 4 times a hour when you increase your speed the left track is slower increase than the right, it does it forward and backing. The left side had just as much power to the track just slower to react to the change in speed.
Can be a sign of a failing speed sensor on the motor. Open the rear cover and swap the sensors. If it happens on the right afterwards then you know its the sensor. Is there any codes in the tcu? See this thread to look at them. You may also need to recalibrate the tcu to reset the tcu
Thanks, that's about what I was told, that it didn't sound like a major transimission problem. We don't seem to have any codes. It's just been a really good dozer and we have never had to work on it so I was trying to get some ideas, And I have worked on a lot of hydro's just not with this electric stuff. Thank again.
Is it worse at higher speeds? The pump or motors might have some contamination in them causing one side to shift slower than the other.