How to determine which power steering pump?

[Mike8668]

Hey all..
Anyone tell me how to tell the difference between a ZF power steering pump and a non ZF power steering pump??

 

[Fast69Mopar]

IIRC, the ZF-style pump use a bolt-on backing plate and the non-ZF pumps use a snap ring retainer on the backing plates. Look at the back of your power steering pump and see if the backing plate is retained by bolts or is retained by a large snap ring. The ZF pump is the top pic and the non-ZF pump is the bottom pic.