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[TR] Erratic Speedometer

Subject: [TR] Erratic Speedometer
From: KingsCreekTrees at aol.com (KingsCreekTrees at aol.com)
Date: Fri, 16 Mar 2012 00:10:55 -0400 (EDT)
Hi Hans;
 
I can't offer a solution, but I can say that some TR3 speedometers are  
moderately accurate, whilst most wave all over the place and offer no 
indication  of actual speed. Between my dad and I, we've owned 5 sidescreen 
TR's and 
a total  of 18 Triumphs. The speedometers of sidescreen TR's are by far the 
worst, and I  no longer look at that instrument. I had one early TR3 where 
the needle would  spin completely around. The faster I drove, the faster is 
spun, to the point  where it spun so fast (propeller-like) that I could not 
see it. In reverse,  it spun backwards. My suggestion is to just drive the 
car and not worry about  it. Sorry to be a spoilsport.
 
Tim
 
 

 
In a message dated 16/03/2012 12:02:34 A.M. Eastern Daylight Time,  
tr3 at roadrunner.com writes:

My TR3  speedometer  whips at low speed, steadies out mid range and   
then becomes erratic around 60 mph. I replaced the cable, routed it   
exactly same way as the original , but the problem remained. I   
suspect it is still a cable problem.
I read somewhere that lubricating  with oil or other liquid is bad as  
the factory carbon lubricant may  migrate with it upwards into the  
speedometer bearings which is  harmful in the long run.
Is the speedometer the more likely culprit? Has  anyone serviced one?  
Could lack of damping with age be a  problem?

Hans, 61TR3A

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