goreds2 wrote:
I have been loving this thread going on 7 years now when I had my 1975 Class C. I now have (for 5 years) a 1989 Dodge XPLORER RV Class B with 318 engine. Today, I took it out on the open highway and at about 55 MPH it was shaking. I know it can be a number of things but just wondering if any owners of late 80's Dodges have experienced this. Thanks,
Note that I checked the tire pressure and they are read the same. (50-PSI)
U-joints and/or driveshaft is the first thing I'd check, especially if anyone's worked on or messed with these. U-joints going bad will cause shaking, barely noticeable at slow speeds and getting worse as speed increases. Usually, a bad u-joint results in a noticeable "clunk" sound when you shift into gear, especially if you're holding the brakes when shifting out of drive/neutral.
An incorrectly (off-center) installed u-joint will do the same thing, although without the clunking noise.
An out-of-balance, mis-indexed, or damaged driveshaft will cause similar effects, often accompanied by a humming/buzzing noise at speed.
Another strong possibility is an out-of-balance tire, due to a wheel weight being knocked or thrown off the rim.
Final likely possibility is wheel bearing(s) going bad or misaligned front end.
