85 -140 speedo swap

mrf0rd

Founding Member
Mar 13, 2001
64
0
0
Kent, WA
I replaced the 85 mph speedometer with a 140mph version for my 87 LX and now my speedometer reads a little high.

We're talking +7 @ 60 mph. Is this a calibration issue with the new unit or something else?

Stock tire size and AOD in use.

Any suggestions are appreciated.
 
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