Re: Overdrive help!!!

Posted by HH56 On 2012/1/15 20:27:45

There is a schematic in the 53 wiring diagramspackardinfo.com/xoops/html/downloads/wirediagrams/1953%2026th%20Series.pdf and a training manual on the B-W overdrives such as then one used in 53.packardinfo.com/xoops/html/downloads/BW_OD.pdf Even though not the best scan quality, it may be of help.

The kickdown switch is a 4 terminal rectangular box with a plunger on the end which is operated by the accelerator. It's located on a bracket next to the firewall & down fairly low.

Electrically you need to verify 4 components. To engage, the knob has to be pushed forward. There is a lockout switch on the OD which is made when that mechanism is at full travel. Make sure the lockout cable is adjusted properly so lever can swing all the way to the end. There is a rectangular relay mounted mid high on the firewall with a fuse on the side. Make sure the fuse is good and 6 volts is present. When the ignition switch is on, there is also 6 volts to one of the two terminals on one end of the relay. If all the voltages are present, the relay is activated by the governor above 17-20mph. The governor is grounded and at speed, it closes a contact. That ground goes thru the lockout switch, thru one set of contacts on the kickdown switch and energizes the relay if 6v from ign switch is present. When relay closes it connects the 6v from fuse and brings in the solenoid. After the solenoid energizes, the car should go into OD when you let off your foot.