We tow a GMC Terrain four wheels down behind our RV when heading south. We have a Roadmaster Guardian shield that we use on that car. Husband is concerned about air flow behind the shield and wants to know if drilling small holes in the shield will be a benefit or if doing so will affect the integrity of the shield.

I got rid of the full rear mudflap in the back and don't need any kind of shield anymore. The mudflap was causing the issue.

Mile High wrote:I got rid of the full rear mudflap in the back and don't need any kind of shield anymore. The mudflap was causing the issue.same here. Jerry Parr

If the mudflap is less than 5" at ride height then it can throw up rocks, etc. A hard shield can reflect rocks forward putting paint and rear radiators at risk. The best protector is a Protect A Tow type to keep everything under the car. If I had a shield I'd cover it with say a shower rubber mat from HD, etc to reduce deflections forward. I'm very doubtful that a shield that far back would have any significant effect on air flow. Now if you drive with the shield stowed on the rig then it seems likely to have a negative effect.

My friend just left and his is sitting in his yard next to shed. He has a brand new 4 door jeep he paid 50,000 plus hes not concern on back of his coach.

crawford wrote:My friend just left and his is sitting in his yard next to shed. He has a brand new 4 door jeep he paid 50,000 plus hes not concern on back of his coach.Understandable and applies to most of us. Rigs and roads are different and it depends upon your level of concern. Since 2004 I haven't had any protection but I've found a few rocks on the toad. IMHO You're more likely to have a problem with the MH windshield.

shield for towed car | Good Sam Community

13 Replies

CA_Traveler
Explorer III
Sep 14, 2019
If the mudflap is less than 5" at ride height then it can throw up rocks, etc. A hard shield can reflect rocks forward putting paint and rear radiators at risk. The best protector is a Protect A Tow type to keep everything under the car.

If I had a shield I'd cover it with say a shower rubber mat from HD, etc to reduce deflections forward.

I'm very doubtful that a shield that far back would have any significant effect on air flow. Now if you drive with the shield stowed on the rig then it seems likely to have a negative effect.
Flute_Man
Explorer
Sep 14, 2019
Mile High wrote:
I got rid of the full rear mudflap in the back and don't need any kind of shield anymore. The mudflap was causing the issue.

same here.
Jerry Parr
Mile_High
Explorer
Sep 14, 2019
I got rid of the full rear mudflap in the back and don't need any kind of shield anymore. The mudflap was causing the issue.

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shield for towed car

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