[fhartell]

Guy's w/ the Stage II chip in there 4.0L did you change the thermostat? If not where there any problems & did JET say it wasn't needed?

 

[fhartell]

nope i didnt and it is working fine...no change in operating temp at all!

are you also using 91+ octane?

 

[KenCary]

I have the Stage 2 in my 3.7 and when I called Jet they said there was no low-temp thermostat available and they said it is not needed if I ran Midgrade or better.

I would call their tech support line directly. It is a free call and they are realtively knowledgable.