The need to do just that is what got us into the speedo business in around 1984. We were bringing in grey market cars and were sending the speedos for conversion. Repeated failures from the supplier convinced us to do it ourselves. We too had problems for a while but at least the car didn't have to sit and wait for shipping.

Anyway different faces were put on and the gearing changed to the odometer. This of course is no problem to a speedo rebuilder but the needle must be removed (which is normally done in calabration). This then requires recalibration.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician