Need help with ct 332

I'll be glad when this machine has finally put me thru fixing or adjusting every darn thing on it, then maybe I will get
to get on this forum and just answer questions once in a while. The problem I'm having now is that the left hand motor gear box
is heating up, very hot, compared to the on the right hand side. The service manuals that I have don't seem to diagnose this type
of problem. Usually when a hub with bearings heats up this hot it's time to replace them. Now I know that the motor gear box is a
sun gear and not bearings, but I was wondering if any of you guys have ever experienced a problem like this. I was just running the
for a little while before I noticed the heat coming off of it. The day before, I had just flushed and replaced the gear oil in both sides.
I have the machine shut down because I do not want to create any further damage until I have found the cause of the excessive
heat, however, I do want to run it and see if the drive motor is producing and transferring the heat to the sun gear, but I don't know
if I should. Any thoughts or advice from from you guys would be appreciated.
Tracks are adjusted.
Gearbox flushed and re-filled.
Tracks are clean and free of debris.
I even petted and kissed the machine before I started her up.

Need help with ct 332