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JWL · 09-28-2014, 08:23 AM

The ignition interrupt-ground switch is only used to return FROM overdrive engagement back to straight transmission drive. As mentioned previously, like going into "passing gear". The overdrive unit will not shift either up or down unless engine torque is temporarily removed from the driveline.

09-28-2014, 08:23 AM	#16
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: R10 Overdrive Issue The ignition interrupt-ground switch is only used to return FROM overdrive engagement back to straight transmission drive. As mentioned previously, like going into "passing gear". The overdrive unit will not shift either up or down unless engine torque is temporarily removed from the driveline.