When we had a cluster replaced on a work truck with a used unit, they put a dymolabel on the bottom of the face of the speed stating the approximate amount that the speedo is off. It is under the lens of the dash, so it isn't easy to remove.

You need to do something like this in order to greatly simplify the process when you attempt to sell the vehicle.

Jim Paget
88 YJ with a few changes

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