The 86 Bandit mini motorhome has a vibraton that we can feel and hear when driving at lower rpms. third gear between 30 and 40 mph and at around 45 fifty mph in fourth gear. When running on up to higher rpms it goes away. Are we just running the gears just a little to low rpm? I have not ever felt or dealt with this before and am looking for any and all suggestions. It has the one ton dually rear wheel set up and is the upgraded version and not the one that was recalled! Wondering if it might be U-joints or something in the drive shaft? We do not have a lot of experience with manual shift rear wheel drives! Although my 90 nissan 5 speed with over 200,000 miles has none of this type vibration. Please any help suggestions appreciated!

 

OH yeah, tires are brand new 2000 miles ago and were properly mounted and balanced with 50 psi in the tires! Hankook ra08 all season tires highly recommended on the yota home sites.

 

Do you feel it in the transmission?

U-Joints?

 

Its hard to tell exactly where its coming from especially sense I dont have much experience with the rear wheel drive toyota. I did crawl under a little while ago and gave the drive shave a really good push and pull around the u joints and could not really see or feel any play. I need to go ahead a do the rear end oil and trans oil. Was going to do it today but its so tight under there that I may go ahead and have a shop do it! From looking at the drain and fill bolts I am wondering if the oil in the rear and trans have ever been changed. At 93,000 miles and over twenty years old a good change would probably do some good. I am going to drive it a couple hundred miles this weekend and will pay close attention to the sound!

 

That would be shaft LOL guess I need to proof read a little better. HA

 

Remove one end of the driveshaft and make sure all the u joints move smoothly.