I just installed the performance software to my 2003 Navigator using the Superchips 1715 tuner.

I feel a power increase for sure, but the engine winds out too fast and shifts too hard using the defauslt performance settings..

When I went in and checked the default peformance settings the tuner installs automatically, the shift points and shift pressure where all maxed out.

Is this normal? Is it dangerous to have the shift pressure maxed out? It feels very sporty, but what will the extra shock do to the trans internals?

I was able to manually reduce the shift points so that they were more normal, as well as reduce the shift pressure down a few notches, and it seems better now.

My question is, where is the best place to set these parameters? I don't want to damage anything, yet I do like the firm shifts.


Please advise


Rick.

 

TTT. Anyone?

 

I'm not officially handling Motorhaven support during my holiday so please have some patience with me waiting for replies, thanks. Did you get this from us (MotorHaven)?

 

A firmer shift is better for your transmission. When you get the laggy shift, that means the clutches are engaged longer, and the pressure inside the tranny is higher for longer periods of time.

 

As mistercmk stated, the softer stock shifts means more clutch pack wear and more heat. You'll actually get more clutch pack life with a chip installed.