[TR] SpeedWOE

[acekraut11 at aol.com]

 Randall,

Once again, thanks for sharing your experience.? I had not heard that the right angle drive was the weak link.? I suspect that the head in the speedo is bad and that the reason that the cable was sticking was heat related caused by too much friction by a dry bushing.

I am confident that the cable did not protrude too far into the speedo.? From previous posts to the list I made sure of the length of this portion of the cable.

As for the inaccuracy, with Vance's and a few other listers help I am hopeful that I installed the correct components in the gearbox.? I will have to do some research to see if I have the correct set-up.

Thanks again,

Aaron


 


Aaron Cropley
71 TR6 (Throttle Body Injection!)
http://www.triumphowners.com/108
Topsham, Maine

 


 

-----Original Message-----
From: Randall <tr3driver at ca.rr.com>
To: triumphs at autox.team.net
Sent: Sat, 29 Sep 2007 8:13 pm
Subject: Re: [TR] SpeedWOE










> It was hard to tell since it was 
> bouncing quite a bit.?

Sign of a bad speedo head or cable, rather than gear problems, IMO.

> Or at least it was bouncing until it 
> stopped completely.? Not sure what is wrong but I pulled the 
> end of the cable off the speedo and driving the car in the 
> driveway did not turn the speedo cable.? So I am guessing 
> that the speedo cable either broke somewhere or the speedo 
> gear I replaced failed.?

Most likely (unfortunately) the angle adapter died.  Weakest link and all
that.

> I am wondering if the cable seized in the speedo 
> causing the cable to break somewhere.?

Could well be.  The Stag I bought last year had exactly this problem.  He
had just replaced the cable & angle adapter, but it was really the speedo
head that was bad.  After driving for a bit, the dry bushing inside the head
got hot and bound even more, causing the angle adapter to break.  Problem
was obvious once I got the speedo head out, since spinning it by hand showed
it was much stiffer than it should be.

Also check that your inner speedo cable doesn't protrude too far on the head
end.  I've heard stories of them being too long and putting pressure on the
movement, with similar results. 

BTW, your speedo will probably still be inaccurate after you get it all back
together.  There is another drive gear inside the J-type that I believe is
different between the Volvo & TR6.  Unfortunately you have to disassemble
the annulus housing to get to it; so it's probably easier to buy a ratio
adapter to go in the cable between OD & speedo head.  A local shop quoted me
$100 a few years back (including the new section of cable between box &
speedo), but it's probably more now.

Randall





 


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