I was wondering if HP Tuners had a feature where you could see the current tranny line pressure while driving the truck. I ask this because the guy who built my tranny says that its not shifting hard and feels like it is slipping because im loosing tranny line pressure. The tranny goes through all gears just fine and shifts fine at lower rpms. When I first installed the tranny it was great; nothing wrong at all. Now at higher rpms the truck will hit rev limiter before it shifts, I end up having to back out. Any help would be apprecaited. Thanks!

 

You can program the tow/haul button to do that...

 

How? I only ask this because the guy who tunes my truck is hard to get ahold of. So I was just wondering in advance if he would be able to check this while im driving. Instead of buying the force motor and the 1-2, 2-3 shift solenoids and not need them.

 

If you find a way to read line pressure on the scanner let me know, I didn't see a PID to do that myself.

 

Do tell.

 

anybody??

 

Just look in the PID's and see for yourself, I don't have my laptop with me at the moment or else i would tell you in a minute or two. Don't think it does though, I did my 4l80 swap and was wondering the same thing, and i don't think I ever found a PID for that.

 

I'm told tranny pressure can be logged. However, he doesn't know if it is actual pressure or commanded pressure. Anyone know the answer to this?

 

Hey if you do have to get the shift solenoids the cheapest place I could find the was the dealer. The only reason im saying is because it was the last place I looked.

 

you can only log commanded there is no pressure sensor in the unit get a a real gauge and check it the old fasioned way