Drum brake backing plate question

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416stroker

416stroker

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Is there a seal or dust gasket of some kind that goes in the center spindle hole? The one plate shown is 69 and older style, and the other is a 70. The 69 plate has a groove for what appears to be for a dust seal of some sort? The 70 has a flange welded on the front over the hole. Seen a few of the 69 /older style with what looks like a cork gasket in the groove. What is the 'flange" for on the 70 Abody plate? My Mopar manual doesn't show a gasket or seal in this area. So I'm curious as to what the groove and flange are there for. I know there is a foam gasket that can be bought to go between the spindle face and the back of the plate, but that's all I've seen. Is a seal necessary? Any ideas?
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Spindle seal is in the hub... '69 and '70 versions. Drum or disc. Both cases the "foam" dust seal goes between knuckle and backing plate.
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4spdragtop said:
Yes I believe there are seals. I made a pr for mine out of sill gasket foam.
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I kinda figured there must be something used in there or why else is the groove there and the flange. I may see if I have some thick cork I can fit in there and cut the center to just slide over the spindle and seal it that way. I've looked everywhere for a number and description online and come up empty. Nothing in the repair manuals either. Time for do it yourself I guess. Thanks for your input.
 
Nothing goes in there, it's just a protection shroud to keep dirt/dust from flying up into the spindle seal.
 
dadsbee said:
Nothing goes in there, it's just a protection shroud to keep dirt/dust from flying up into the spindle seal.
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You may be right, just seems like something should go into that round grooved area behind the shroud. But I guess the shroud would keep most of the debree out of the seal. Just curious.
 
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I've never seen anything but the White dust foam in the back. If you put anything in that recess it will interfere with the spindle seal that's mounted in the hub.
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Note how it says Brake Support to Steering Knuckle. That's the white foam that gets bolted between the two as I show above.
 
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