Re: [Diesel-RVs] unknown vibration when coasting

My first guess would be U-joints. I have a 2002 Ultimate Advantage with 32,000 miles on it. Just came back from Myrtle Beach and started to get a vibration / roar. I did not think U-joints as they had been lubed more frequently than called for. Took to Cummins South --- ended up being a U-joint. The grease distribution channels had a defect in the making of the U-joint. Even though they were greasing them as called for, the grease was not getting where it should be going. They replaced both U-joints and the noise / vibration went away.

--
Dave Knight
dknig288@comcast.net
Hook'em Horns 1969

-------------- Original message --------------
From: "glenmilender" <glenmilender@yahoo.com>

> I have a Safari Serengeti RV with a 300 hp CAT and 6 Speed Allison
> Transmission. The rig has not quite 40k miles. The problem - once the
> thing gets warmed up and I'm going down the highway, it vibrates
> somewhere in the back end. It will quit momentarily if I touch the
> brake or accelerator. Sorry, it's a rear diesel pusher. A man replaced
> some bolts in the suspension he said were worn and I have six new tires
> that are balanced. Alignment has been done as needed. Any ideas would
> be real helpful. My friend says it's in the rear end, but I doubt it.
> It doesn't act up when it's pulling. Thanks a lot, Glen Milender,
> Northern Minnesota
>
>
>
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