Re: Hill Holder for BW OD Cars

Posted by HH56 On 2015/6/27 13:09:25

Here is a link to the original article so you an read it. Since it was published in 54 they must refer to the R10 or 11 units.

The article does mention you cannot have OD and reverse engaged and to remember to disengage the solenoid if going into reverse. There is mechanical linkage which should also force the OD to disengage to prevent reverse and OD at the same time.

R11s were of different mechanical construction from the R9s and much more forgiving if something happened and the prevention didn't work. Packards early or mid 22nd series R9 replacement and making retrofit kits available using the R11 was in large part due to the reverse problem. In the R9, if OD solenoid was somehow energized and OD was engaged when reverse was selected the OD would lock up. There could even be physical damage if enough power was applied trying to move the car while the OD was locked.

Call me dense but I still don't see how an OD such as Packard used will function as a hill holder which to me would be something that prevent the car from rolling backward when on an incline.