Thanks for all the quick responses! I truly appreciate all the input. I will jack it up and roll to see what I can see. I think the Daytons, by design, could be a source of problems now that you mention it Blue Goose. Seems like I can never get the adjustable wheels on my Ford 4000 tractor...

My newly acquired 79 F-600 has a bouncing problem. 370 5 speed with two speed rear, 16' grain bed with hoist, 9.00 x 20 tires on Dayton style wheels. Rides like a Lincoln empty, but with 7-8 tons on it develops a vibration and bounce at about 38-45 mph. This is not a little vibration but a...

Long time Ford owner and driver......many cars and pickups through the years.....a couple of F350s. Had a 63? F-500 several years ago but I let it get away. Just got a 79 F-600 with hoist and grain bed. Needs a little TLC but made two trips to the grain elevator today.smilieFordlogo It's nice...