I would agree that it is probably a driveshaft problem. I just replaced mine on a G1800. New driveshaft will run you about $400 for the part, if that's your problem. It is a very common problem with the G1800, G1900, and G2000.
Hi, My driveshaft on my G1800 has failed today (universal joint and yoke damaged) and I was wondering if anyone has had the pleasure of replacing one of these. Any help or tips would be greatly appreciated.