ktbaillif Report post Posted April 27, 2015 Rear rumbling and vibrations at highway speed – Intermittent, getting more frequent 1999 Safari Zanzibar, Magnum Chassis, Diesel Pusher – The rumbling sound and vibrations in the rear are the same as when traveling over rumble strips. Previously, thought it was the road surface but now it is happening more frequently regardless of the road surface. Please help identify this problem. Share this post Link to post Share on other sites
wolfe10 Report post Posted April 27, 2015 ktbaillif, Welcome to the FMCA Forum. Check U-joints for play.Check ride height-- that short drive shaft is particularly susceptible to out of spec angles. What suspension do you have-- Velvet ride or air?Check lug nuts-- make sure the wheels are properly torqued. Share this post Link to post Share on other sites
ktbaillif Report post Posted May 1, 2015 Thank you for your help with this problem. It did turn out to be the rear airbags. Because they were leaking, it put a strain on the U-Joints. We are having the airbags replaced and the U-Joints checked out. Share this post Link to post Share on other sites
wolfe10 Report post Posted May 1, 2015 Be sure they check/adjust ride height after replacing the air bags. Share this post Link to post Share on other sites
