[T3] noisy speedometer in my 1970 fastback

[Cody Andresen <cody@codyandresen.com>]

<x-flowed>I recently replaced a snapped speedometer cable in my 1970 fastback. 
Accoding to the prior owner, it was broken for a couple of years. 
After about a week of perfect operation, the fully functioning 
speedometer unit has developed a noisy squeal.  sometimes it is 
intermittent but now it is pretty constant, even at low speeds.

Should i crack open the unit and lubricate the mechanism or should I 
just get a new one?  If I do get in there, what is a good lube to use 
and what should I watch out for?  Looks like I'll need to pop off the 
chrome ring to get in there and the tiny flanges look fragile.

Thanks,
Cody
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