After installing JL's chip, the performance has been great. One thing that I have noticed is a "squeak" duing mid throttle shifts between 2nd and 3rd. I do not remember hearing prior to installation, not to say that it wasen't there. It sounds as if it were comming from the transmission, and it happens when the throttle is about 1/2 and the shift is a bit hard (bump).
Has anyone heard of this before?

 

Maybe 'belt noise' as mentioned in another post on this page? All I've ever heard was the blower screamin'.

Dan

 

I've got that squeak also. I'm pretty sure it is the belt.
Check this thread out.
https://www.f150online.com/forums/sh...threadid=52409

 

Sometimes JL accidentally drops a squeeker in the chip during shipping. Simply take the chip out and shake it until it falls out. Let me know if you have any problems.

 

Sorry, I had to say it. Hey, it's Friday and I'm in a good mood.

 

Me Too.