Driver side wiper Goes too far to the left.

I have the same problem, but never thought it important enough to post about it. I basically got around the problem by running the wipers at a slower speed. However it is a sign of a more major problem down the road so I will take all of your suggestions and use the right one.

Thanks Al

There are a number of Forest River coaches experiencing this problem. What seems to have happened is the factory failed to insert the serrated locking washer under the acorn nut that holds the wiper arm on the splined drive spindle. Remove the acorn nut, pull the wiper arm off the spindle and reinstall it to the correct location, then reinstall the acorn nut but use a bit of blue LocTite to keep it from coming loose. Should solve the problem. Make sure to do both sides.

Motor mount is solid. I will continue to search for the fix.

You might want to consider frameless blades, they will grip the windshield curve.

incorrect size wiper arm

It could be the spline on the wiper arm itself as others have said but also check the attachment of the motor itself mine was loose causing this same problem. It was difficult to access the nut under the hood to tighten it. It is easy to check just grab hold of the motor and linkage and twist it,if it moves it need to be tightened.

I also had the same problem on my two arm wiper. the mount inside the hood was loose. I placed the wiper in the correct place and applied a large amount of RV goop to the mount. So far it is working. Time will tell.

I also had the same problem with a similar rig. In my case the acorn nut and the knurled driver was loose/stripped. I've had good luck getting wiper replacement parts here:

Mill Supply

Lou
05 Travel Supreme Envoy

I had the same problem. I removed the nut and saw the splines were worn too bad to trust so after fixing it temporarily I ordered two new drives from Diesel Equipment Co in Greensboro NC. Replacing them was easy though it did take a little time. The reason I replaced both of them was for peace of mind.

I have exactly the same problem on my '05 Itasca Sunrise. So, will be watching all replies.