Re: Over drive won't work

Posted by HH56 On 2012/4/17 15:43:30

Details of the switch installation are in SC 21#15.packardinfo.com/xoops/html/downloads/SC/SC-VOL21NO15.pdf

Briefly because of internal R9 mechanics if solenoid doesn't drop out or something electrical prevents normal drop out then when shifting into reverse, a lockup or damage can happen.

Normally the OD gets power thru the switch anytime car is not in reverse. As soon as reverse is selected ALL power to OD is cut so solenoid is forced to drop out. The switch could be bad, miswired or even the wrong one. That occasional reverse lockup problem was the main reasons R9 cars were in the program & could be retrofitted with R11s. Different internal construction so those couldn't have the problem.