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#1 |
Registered User
Join Date: May 2013
Location: You're the only 10 I see
Posts: 367
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OE DG4 mirrors vs Reproduction
A few years ago I put a set of used reproduction "DG4 style" mirrors on my truck. I do not know the exact brand but assume they are the ones that LMC and others sell.
They have always been very shaky at any speed, particularly 15+ MPH. On the highway they are actually pretty useless and are almost a distraction. I am trying to determine what route to go with mirrors while I am restoring my truck (would prefer OE DG4), but wanted some more opinions on whether this "shakiness" is typical of all repro DG4 mirrors or if mine are extra junky. See below for 2 pictures of mine, and a picture I stole from this forum that shows real DG4s without vibration. I don't know what speed this was taken at, but they're way better than mine. The minor bracket difference is a non-issue to me, I just want them stable. Opinions??
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1972 C20 |
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#2 |
Registered User
Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,469
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Re: OE DG4 mirrors vs Reproduction
I have oem on the 72 . They shake a little at speed I don’t think it’s all the mirror . I think the door skin vibrates too with the wind pressure exerted on the mirror.
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Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. |
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#3 |
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![]() Join Date: Apr 2017
Location: Boise, ID
Posts: 856
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Re: OE DG4 mirrors vs Reproduction
Did you put rubber washers between the brackets and body? I also rebuilt mine with all new nylon washers and cleaned up all the connections.
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1968 GMC C2500 Long Bed Fleetside |
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#4 |
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Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,469
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Re: OE DG4 mirrors vs Reproduction
I tried them with nylon and rubber washers at the body mounds . No difference and I replaced all the nylon on the arms .
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Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. |
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#5 |
Registered User
Join Date: May 2013
Location: You're the only 10 I see
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Re: OE DG4 mirrors vs Reproduction
I had nylon washers on mine.
Willys_MB, are yours stable at higher speeds?
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1972 C20 |
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#6 |
Registered User
Join Date: Oct 2009
Location: Denton, Texas
Posts: 1,713
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Re: OE DG4 mirrors vs Reproduction
I don't have a pair of the DG4s, but would love to have some someday for my C20. I would imagine their might be some vibration as they are larger mirrors, thus more drag in the wind at speed. My mirrors on my 1968 are very stable at speed, and I think that there is a backing plate in the door that bolts to the mirror helps with the stability. Maybe fabricating a backing plate of sorts for the bottom two legs of the mirror may help with the vibration?
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#7 |
Registered User
Join Date: May 2013
Location: You're the only 10 I see
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Re: OE DG4 mirrors vs Reproduction
Thanks guys. Any others with experience or feedback ?
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1972 C20 |
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#8 |
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Location: Boise, ID
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Re: OE DG4 mirrors vs Reproduction
I don’t have any vibration issues at higher speeds. Mine are pretty stable. I don’t have the nuts overtightened because I need to fold the mirror arms in to get the truck into my garage. They’re stiff enough to stay out on the road, but I can still fold them in without feeling like I’m doing any damage.
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1968 GMC C2500 Long Bed Fleetside |
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#9 |
Registered User
Join Date: Jan 2009
Location: South Carolina
Posts: 262
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Re: OE DG4 mirrors vs Reproduction
Put a pair of LMC mirrors on my '69 and they shake bad also . Wish I still had the factory mirrors .
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#10 | |
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Location: Carrollton, KY
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#11 |
Registered User
Join Date: May 2013
Location: You're the only 10 I see
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Re: OE DG4 mirrors vs Reproduction
Is there a “better” quality reproduction brand for these mirrors out there?
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1972 C20 |
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#12 |
Registered User
Join Date: May 2013
Location: You're the only 10 I see
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Re: OE DG4 mirrors vs Reproduction
humpty bumpty
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