Re: Over drive won't work

Posted by Rick Endler On 2011/2/19 23:55:27

I have had similar problems with my '48 with an R9 overdrive. Usually the fixes have been pretty simple. Check all overdrive wiring connections, especially to the relay and kickdown switch, for corrosion and tightness. Also check that the kickdown switch is working (simple electrical continuity check using a multimeter). If not, carefully disassemble it (has small internal springs and sliding contacts)and check for internal corrosion. Examine the contact points inside the relay for corrosion as well. These things have fixed all but one of my OD problems. If the above doesn't correct the problem, try to find a Motors Repair Manual from that period as they have OD troubleshooting flowcharts that are helpful (I can help with that if needed).