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Re: Flaky speedometer revisited
Something like this shouldn't be that difficult! I haven't tried pulling
the one off my '88, but it looks almost like the old cable end! Of course
you run the risk of something falling into the diff if you don't know exactly
what is going on inside (and I don't in this case)!
I'll take a look in the Bentley for the 5k tonight, but there shouldn't be
much more than a worm gear on the diff output shaft that connects to a gear
that is connected to the sending unit. I suppose that the drive gear is
probably plastic, but the risk of something binding and causing teeth to
break off the gear is pretty remote IMO. It is most likely to be an elect-
rical problem. You should be able to confirm the problem by hooking a tach
or dwell meter to the pins on the sending unit. The dwell should be constant
independent of speed unless there is a problem. The tach value should be
related to speed when things are working OK. This thing is in a pretty tough
environment, so hopefully it is sealed up pretty thoroughly. If you're
convinced that it is the sending unit you might want to see if there isn't
some way to disassemble the thing.
I'll get back to on the Bentley info tomorrow ... Good luck!