It makes me want to scream when the same questions are asked over & freaking over so I searched but found nothing.

99 F150 5.4
Gryphon CTS custom tow tune.

For those of you "in the know". Where do you have your shift points set? If I remember correctly they are set as a percentage. I like the firm shifts but how much is too much? I don't want to be causing tranny issues.

 

I've left mine at zero (0). The "firmess" Bill put in my shifts feels fine to me. You don't want the shift to feel like a "Kid in the backseat kicking your seat back" (thanks, Longshot).

But seriously, I would not increase them TOO much, since they are already increased in the custom tunes. Maybe try 3% and see how that feels?

- Jack

 

If you have custom tunes then leave it alone on firmness. For shift points I think they change the shift in respect to MPH and load. Increasing them should be whole number increments which just add or subtract by MPH.

If you are asking about the shift firmness, (and if it is like the monochrome gryphons) you are changing the firmness by changing the time from start to finish on the shift. By decreasing the time the shift gets firmer because it occurs faster. Keep looking for info, maybe also check the PHP forum. I think there are a few threads over there. This is one of the settings that can really screw things up if you don't know what is going on.

Keep in mind all the trucks are different and all the tunes are different so someone giving you raw numbers is not very useful to your application. You aren't changing the actual time, you are changing the baseline. Every tune generally has a different baseline even though they all read zero. The zero is just for a frame of reference. Like Jack said, try the lowest adjustment and gradually change until things feel better. That will be YOUR number.

 

Thanks for the replies fellas. I will check PHP for additional info. also.