My truck has a wh1c on it correct? Whats the difference between the wh1c, the hy35 and the hx35?

 

The WH1C and HX35 are identical except on the WH1C the compressor housing is held on by a clamp instead of a snap ring. The HY35 was used on 2000-2001 (I think) automatics. It has a 9cm housing that chokes early.

Here's a site that explains it better: http://www.dodgeram.org/tech/dsl/FAQ/turbo_faq.htm