Quote:
Originally Posted by cavaliers16
This was not as easy as I had expected. I think I need some more input before I swap these out. Here is what I have so far- please contribute if you can: 
Year, Model, Owner, Part #, SP, SP, SP, Reads...
82, D, Craig, 123 542 27 57, 29, 46, 77, ?, not original
82, D, toomany MBZ, 123 542 28 57, 28, 43, 72, ?, not original
83, D, cavaliers16, 123 542 18 57, 26, 47, 76, Fast
84, CD, toomany MBZ, 123 542 28 57, 28, 43, 72, ?
85, D, Jeremy5848, 123 542 27 57, ?, ?, ?, Correctly
So, both Craig and Jeremy have the same speedo. toomany MBZ has speedos with similar part #s but different shift points. Mine is screwy across the board.  |
You are wasting time publishing the part numbers off speedometers, the important thing is the K-factor, as described previously.
If I had copied down the K-factors over the years I have worked on Instruments I would have the answers to your problems. But I didn't record anything 
Swap a known speedometer from a similar model, and you still going to have error if the speedo has lost calibration over time. These things all drift over the years because the magnets age. Maybe that is why speedometer shops are in business? 
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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!
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