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Old 05-12-2002, 08:21 PM   #1
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1977 20' Argosy 20
Charleston , West Virginia
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Speedometer Problems

My speedometer is all over the place. Sometimes it reads zero, sometimes my 345 is screeming down the road at 85! It is usually some 10-20 mph too fast.

I did take the cable off and spray silicone lubricant on the cable end and the arm out of the speedomter. It still is erratic. Could this be the cable or the speedometer itself? The mystery is that the odomter seems to be tracking normally (just by comparing it to the mile markers on the road).

Fred H.
1977 Argosy 20' Motorhome
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Old 05-13-2002, 08:00 PM   #2
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1978 28' Argosy 28
Tampa Bay , Florida
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The $64.OO Question is..... Does your Cruise control work?

Now I know your thinking "why would Brett ask if my cruise control is working when I have a speedometer problem?"

Let me explain. The P30 chassis being a GM product suffers from some of the GM quirks. The Speedo cable comes from the transmission to a box (under the drivers side seat on my argosy, directly above the left wheel). From this box a cable goes to the Speedo. The box in question is the cruise control. If you lubed the upper end as you described, you have not added any lubricant to the lower speedo cable. The lower cable has a tendency to bind and SNAP. This will not affect the ability of the MH to go down the road, but you will not be able to drive thru Waldo, Fl.

My reccomendation would be to lube the lower cable and see if it helps. If it does snap you should be able to replace it youself as long as you do not mind a little grease.
Brett G
WBCCI #5501 AIR # 49
1978 Argosy 28 foot Motorhome

Wise men talk because they have something to say; fools, because they have to say something. -- Plato

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