Changing Transmission Shift Points
 

is it possible to change the transmission shift points? ive heard about people doing it to other vehicles and i was wondering if i could do it in my jimmy

RE: Changing Transmission Shift Points
 

If I remember right, the Hypertech Power Programmer III can do it for you...

RE: Changing Transmission Shift Points
 

thanks man!

RE: Changing Transmission Shift Points
 

Be warned, though, if you use the engine tuning that they have, you're going to have to run premium fuel...

RE: Changing Transmission Shift Points
 

The hypertech has a 87 octane formula as well, but I had to run 89 with their programming in my Bravada. I did keep the programmer and reset it to factory before I traded it in.

Other than a programmer like that, they can be changed with a custom tune as well, but this will require sending your PCM to be programmed, but gains can be higher than the handheld programmers.

RE: Changing Transmission Shift Points
 

According to the website, the programmer for his year, doesn't have the dual octane settings...

part # 370202

RE: Changing Transmission Shift Points
 

Ah yeah, mines for 98-00. That's right.

RE: Changing Transmission Shift Points
 

I bought mine, mainly because I knew I was going to bigger tires (smaller for winter, lol) The engine tuning is just a benefit (and yeah, it runs a lot farther on a tank of gas on mid-grade, than regular... though the current tank I have, I'm at 300km, and 1/4 tank...)

RE: Changing Transmission Shift Points
 

hmmm the premium fuel thing sucks lol
i just wanna change my shift points

RE: Changing Transmission Shift Points
 

I'm 95% sure that you can change the shift points, without adjusting the engine performance, but you might want to shoot them an email just to make sure, and take a look around ebay for that model...