Replaced all of the micro switches last year and it made the tractor
almost run like it had new batteries. Ended up saving a lot of energy,
better acceleration, etc., but don’t stop there.
Suggest you replace all the brushes on the main drive motor and also
consider changing out any other boards and the 2 smaller relays if you
have a chance as well. Remember to change out any bad clips to the
boards. You can modify small connectors , female end, by very carefully
squeezing in the edges ever so slightly and bending in the middle back
to cut down on the wiggle. The tiny original ones don’t appear to be
availed anymore.