I have a 1999 Bounder which is on a Chevy P30 chassis. I bought it in May and have driven over 3000 miles. It now has about 45,500 miles on it. There is a very distinct vibration in the front end when traveling 40 to 45 mph. Above 50 mph, smooth as silk. The coach has a Safe Steer system and new suspension bushings and new front spring air bags inflated to 70psi. I first suspected an out of balance tire. When I went to balance the front tires, I found the left one severly cupped and the right one a little cupped. I replaced the tires and watched them being balanced at a Les Schwab truck center. The vibration did not change in any significant way after getting the new tires.
There is no bad play in the steering wheel and the coach does not pull. With the Safe-Steer in place, you can't really shake the tie rods, etc to check the ball joints, but other than this vibration, she is a delight to drive. At this point I suspect the front shocks but not sure why I am only seeing this vibration at these speeds. Thoughts and advice are welcome.
There is no bad play in the steering wheel and the coach does not pull. With the Safe-Steer in place, you can't really shake the tie rods, etc to check the ball joints, but other than this vibration, she is a delight to drive. At this point I suspect the front shocks but not sure why I am only seeing this vibration at these speeds. Thoughts and advice are welcome.