Searched and found two threads on the Z-Max oil additive but nothing on the tranny stuff. I can understand there are a lot of purists out there that advocate no additives, so their opinions will most likely be the same as for the oil additive.
Otherwise, I was reading something today since I felt that my 6 speed wasn't shifting all to smooth (I'm just hitting 6k). This product was recommended for this issue. My thought is that the little 3 oz additive couldn't hurt, but then again what could 3 oz of a product really do to help?

 

i used zmax oil additive but the pack didn't come with the tranny additive which is what i wanted. it came with the fuel additive instead.

does it work? who really knows. in theory it looks good. my jeep has run perfect since i used it.

if i find the tranny additive i will use it. i don't see how it can hurt.