G4003g Change Gears Noisy

Since I've changed the motor on my g4003G its a lot quieter....

now i hear noise from the change gears.....

If i drop the main gear out of the way and run the lathe it is very quiet. but then i don't have a any power feed or thread capability.

Ive played with the alignment and the back lash but i can't seem to quiet it down much .

is there a special lube that may help?

thanks in advance