BruceAllcorn
Senior Member
Offline
I have a 1962 tri-carb with an overdrive that I am running Redline MT-90 in. When I flip the switch to switch it into OD there is a delay of 1.5-2.0 seconds before the OD drops in. If I am accelerating from a stop with the OD on, when I get into 3rd gear the OD will have dropped out and will not re-engage until I have built some RMP's. If I am slowing down and shift into 3rd gear it will often drop out of OD and once I accelerate and the RPM's get higher it will again engage. I have just enough play in the gear shift lever to be able to "engage" the OD switch on the gearbox while in 3rd or 4th gear to disengage the OD, but in my normal shifting this does not come into play so I don't think that a worn gear shift lever bushing or a bad overdrive switch are the problem. Any ideas as to what is/are causing this problem?