Originally Posted by
OnRDPassion
In the manual it says to add a little grease in the gear box, also the grinding is happening without a motor in the car yet.
If you run grease in the transmission case, it needs to be cleaned regularly. I suggest running it dry, or just a couple drops of 50,000 diff fluid. The diff fluid will make it quieter, and not muck up as bad as grease. Just a drop or two works great.
