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Old 04-17-2008, 12:45 PM
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Join Date: Dec 2007
Posts: 9
What is that noise? Speedometer?

The last few days commuting in my '81 240D manual tranny are driving me nuts. I get up to around 62-65 mph and begin to hear a strange soft rattle/buzz coming from it seems the passenger side dash. It isn't dependent on engine speed (it doesn't go away when I push in the clutch and the rpm's drop) but is definitely is related to speed of the car. After the car drops below 60 it disappears. It just started doing this a few days ago. The other clue is that it seems to not do it while it's cold. After I left the house this morning I got it up to highway speed and didn't hear the noise until several miles down the road.

My speedometer is about 3-5 miles off, it does like to jump at speeds under 20mph. Could this be the cable making noises?
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Old 04-17-2008, 01:53 PM
carnut's Avatar
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Join Date: Jul 2006
Location: Stockton California
Posts: 637
Reach up behind the speedo cluster, push it out and disconnect the speedo cable, then drive it for 2 days. Noise gone?
81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.
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Old 04-17-2008, 07:20 PM
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Join Date: May 2007
Location: Madison Heights, MI
Posts: 11
I used to always get noise from my 240D spedo cable, except mine only happened in the cold. I unscrewed it from the back and lubed it last year and haven't had any problems since.
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Old 04-18-2008, 12:03 PM
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Join Date: Dec 2007
Posts: 9
Thanks guys!
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