How do I tell if I have a Large Sector or Small Sector Power Steering Box?

[jenkins71]

Hi Guys. I have a 1971 Charger. I need a new pitman arm, but am unsure if my power steering box is the correct "small sector" box for my car. I've done some research and apparently after 1973 the box went to a larger diameter shaft that the pitman arm rides on, and uses a different part for the pitman arm.

The previous owner of my car did a lot of work to it, and I seem to remember a receipt for a replacement steering box. And the splines look pretty big. So I have a suspicion that the box with my car is a 1973-up unit.

Is there any easy way to ID what kind of box I have? And, if it is a large-sector box, will simply using the correct pitman arm for that box work with the rest of my components, including the center link? Reason I ask is that before I pulled the motor out, the center link was rubbing on the oil pan on one side and I'm wondering if the whole system was off.

Thank you for ANY information you can provide about power steering boxes and their different pitman arms and sizes!

-Sam

 

[NOSTRT980]

Should be a small sector unless it from a van

- - - Updated - - -

http://www.bigblockdart.com/techpages/steeringbox.shtml

 

[jenkins71]

That's all information about manual steering boxes.
I think any 1973-up box of this type was a large-sector.
I just want to know how i can identify my box before I order the wrong pitman arm! I would not be surprised if he had swapped a box from a later car, say a 1976 Cordoba for example, into this car.

 

[jeepers007]

http://www.moparts.org/Tech/Archive/steering/14.html

Good info above. With the part numbers you can visit Rockauto and see pictures.

 

[badlite]

Some c bodies also had large shaft.