RE: [Chrysler300] billz speed o meter

["Rich Barber" <c300@xxxxxxx>]

I'd bet we've all learned a lot about speedos, but I have yet to hear about
using powdered graphite to lube the cable.  Seems like that was the standard
fix back in the cold country where lots of speedos went "ape" in the winter.
Almost any liquid lube tends to get pretty viscous at subzero temps.

 

Rich Barber  (yes, it was messy)

 

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Warren Anderson
Sent: Monday, July 18, 2011 1:04 PM
To: NANCY TERRY; Chrysler 300 group; Bill Leahy
Subject: Re: [Chrysler300] billz speed o meter

 

  


Bill,

When parts are swapped and the problem persists, maybe whatever the swapped
part is is not the problem. Or, both swapped parts have the same problem.
So, swapping parts may be a plan that doesn't work too well in all cases. 

Bouncing I have found to be a cable problem. There is no damping per se in a
speedometer head. The head needs a clean signal. The needle cup also needs
to float smoothly on clean bearings with the correct lube which is not the
same lube that should be used inside the cable housing. The bearing that
sees cable rotation does not like cable lube either and must rotate
smoothly. 

A worn out cable housing or core or both can cause speedo needle bounce and
even with proper lube. Cable routing is critical also so the thing is not
bent around too tight. 

A speedo shop will have the equipment to check out both of your instruments,
lube and calibrate as required and build you a new cable if required. This
would be another route to diagnose and fix. I like this plan.

I think that J C Auto in Lynwood, WA, would be a good place to have your
treasures checked out and maybe even restored.

Warren Anderson
Sedona,AZ

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