Topic: Grease Cap Spring?

[ChrisV289]

I was at my friend's shop the other day and I was getting some grease caps for the front wheels and he mentioned there is supposed to be a spring inside that fits against the spindle to reduce static. I don't see anything in the diagrams. Is this correct? Never heard of it before.

[jwc66k]

Got a copy of the 65 Electrical manual? It's on page 61. Part of the radio option. Sometimes it works.
Jim

[Bob Gaines]

I was at my friend's shop the other day and I was getting some grease caps for the front wheels and he mentioned there is supposed to be a spring inside that fits against the spindle to reduce static. I don't see anything in the diagrams. Is this correct? Never heard of it before.

99% of the time they get tossed the first time the cap comes off. I have never noticed a improvement with them compared to without them . With that said they have a basis in fact otherwise the engineers would not have indicated their use. 

[67350#1242]

Theoretically the spring provided an electrical connection from the wheel to the spindle to keep the static charge down that builds up when the tires are rolling down the road.
The grease within the bearings provides somewhat of an insulating barrier between wheel and spindle so that if charge buildup reached a certain point a spark would occur and you could hear a snap in your AM radio,  not a problem with FM.  Don't know how effective they really were but became less of a problem as people migrated to FM.
Kurt.

[J_Speegle]

Here is a thread related to your question and subject

Used the words "radio spring" though many other combinations would likely work also

http://www.concoursmustang.com/forum/index.php?topic=17198.msg109827#msg109827