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Old 05-26-2019, 04:28 PM   #1
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Thor Super C Issue

I have a 2016 Four Winds 33SW Super C and on a recent trip in the Idaho mountains I discovered a potential dangerous issue with the mud flaps. My Super C has mud flaps behind as well as in front of the dual rear wheels. When I slowed down to pull through a small town (25 mph), I heard a loud grinding sound. I immediately pulled over to check my drive train since it sounded like my drive shaft was getting ready to fall off.


Long story short, it turned out to be the forward rear wheels mud flap support on the passenger side had come loose and the mud flap was rubbing on the dual wheels. After looking at how the mud flaps are installed and secured, I discovered Thor attached a metal bar from near the bottom of the mud flap to the outside edge of the trim. They use 2 self-tapping bolts that go through a piece of galvanized metal about 1/32" thick. The bolts had come out allowing the mud flap to rub the tires. I thought I would find they had punctured one or both of the rear tires. No bolts in either rear wheel, so I dodged a big bullet.


After securing it the best I could with other bolts I had on hand (I keep a good bench stock when traveling), I repaired it later that day. I bent a piece of flat metal and attached it to the inside edge of the underside on a deflection plate Thor installed to protect the LP tank. Now the mud flap is secured on both sides and the new bracket is in thicker metal.


If you have a Thor Super C motorhome, check your mud flaps for missing bolts. If any are missing, check your tires.
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Old 05-26-2019, 06:19 PM   #2
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Quote:
Originally Posted by mspoe View Post
I have a 2016 Four Winds 33SW Super C and on a recent trip in the Idaho mountains I discovered a potential dangerous issue with the mud flaps. My Super C has mud flaps behind as well as in front of the dual rear wheels. When I slowed down to pull through a small town (25 mph), I heard a loud grinding sound. I immediately pulled over to check my drive train since it sounded like my drive shaft was getting ready to fall off.


Long story short, it turned out to be the forward rear wheels mud flap support on the passenger side had come loose and the mud flap was rubbing on the dual wheels. After looking at how the mud flaps are installed and secured, I discovered Thor attached a metal bar from near the bottom of the mud flap to the outside edge of the trim. They use 2 self-tapping bolts that go through a piece of galvanized metal about 1/32" thick. The bolts had come out allowing the mud flap to rub the tires. I thought I would find they had punctured one or both of the rear tires. No bolts in either rear wheel, so I dodged a big bullet.


After securing it the best I could with other bolts I had on hand (I keep a good bench stock when traveling), I repaired it later that day. I bent a piece of flat metal and attached it to the inside edge of the underside on a deflection plate Thor installed to protect the LP tank. Now the mud flap is secured on both sides and the new bracket is in thicker metal.


If you have a Thor Super C motorhome, check your mud flaps for missing bolts. If any are missing, check your tires.
That's pretty well the way mine are mounted on our Quantum. I need to catch up with everything else so I can do my coach list and that's on it.
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Old 06-02-2019, 08:33 PM   #3
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I had the same problem and I modified mine on the right and left sides to reinforce them.
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