Tech's;
We took a trip in our 2005 E350SD 6.0L PSTD SMB RB15 Class "B" motorhome to Indiana July 16-19.
Camped out @ OUABACHE {?Wabash?} State Park near Bluffton.
Dropped the travel trailer and drove to SMB in Huntington.
It was raining on the way back to camp so I was manually downshifting to assist braking on wet pavement.
I noticed a thud [?in the driveline?] upon acceleration, with the transmission manually shifted into low [1st]gear.
This occured while running light {7500LBS} but was not noticed while
towing.
Do We have a problem?