After going on a 500 mile round trip this weekend in the 601, the transmission has gotten loud- again. It is starting to sound like a hay combine, again.... Back in January I put in all new skf bearings, seals-etc. Used the equivalent to the factory oil ISO 68 from pepboys. So the bearings are almost shot.... Am I the only one this keeps happening to? Maybe that oil I'm using isn't really the same, as it claims? Doubt there is 2000 miles on these new bearings. The oil level was perfect too... I will say, right after the new bearings- it was very hard to get into first . Then it worked it self out/ got much easier. Wonder if all of the force of persuading it into gear, made the bearings wobble.... Either way, another rebuild is on the way.