overdrive

F

fast fredy

Senior Member
Morning guys .Its my understanding that in the overdrive operation , the governor controls the operation of the solenoid even if the cable is pulled out (disengaged ) that being the case , at any speed over 28 mph the governor would ground and solenoid would be activated and trying to engage all the time even with the cable out.. Seems to me this would hard on the solenoid wiring and solenoid and un necessary draw on battery power.. please enlighten me if this is incorrect or other thoughts on this... thanks Fred
 
You are correct about the operation. Some earlier Overdrives had a switch that interrupted The signal from the governor when the cable was pulled. Evidently Borg Warner thought it unnecessary and eliminated it. A little creativity would mount a mechanical brake light switch to do the same job.
 
The switch was considered redundant somewhere in 1951 so was deleted. The solenoid is active but is in hold mode which doesn't use all that much amperage. If the overdrive is locked out it can't engage. I too prefer the set up my two 51 Mercury cars have since they are both early 51s.
 
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