HELP NEEDED: caterpillar m313D wheeled excavator travel power very low

Hi,

I am looking for some or any help with my 2009 caterpillar m313D wheeled excavator, serial number catm313djw3h00836.
the machine has very little to no power to the travel wheels in either hi or low speed but is digging fine or maybe a little slow on the stick speed.

So far, I have replaced the travel motor, the clutch packs in the transmission, replaced the upper swivel seals, and swapped out almost every solenoid from a similar machine.

I have cat et and it is showing no...

HELP NEEDED: caterpillar m313D wheeled excavator travel power very low