Using HPT, I want to increase the transmission line pressure for holding 4th gear. The only thing I can find to adjust is the 3-4 shift line pressure. Are these the same thing? Or am I missing the table that I need? Thanks in advance.

 

you Should be able to adjust each shift pressure?

 

you want to give it more throttle when in 4th with the verter locked rite?
go under transmission>auto shift speed>part throttle shift>normal/cruise.That will let you adjust the throttle % it takes to down shift.If you want it different when the cruise is on then just do the cruise table,rite now mine are set the same.Hope this helps.

 

I'm trying to eliminate 4th gear-lockup slipping.

 

go under transmission > auto tcc > apply release speed > normal/cruise.
i dont see anyway to increase the pressure,just the throttle % vs speed it takes to make it down shift/unlock.
a billet 4th servo will increase pressure

 

Change the max under tcc duty to 100 and the min to 90. That will cure your lock up slippage.

 

O I read that way wrong. Do what he says, you can also adjust the ramp rate a little bit, I hated my 60e lock up with the PWM set up like that. using the ramp rate you can make it feel quite a bit better, at least on mine it did.

 

I have both billet servos, The entire Force Motor Current tables have been increased, and Shift Pressure for 3->4 shift are all maxed out. My torque converter locks up perfectly in 3rd gear, but 4th gear slips anywhere from 400-950 rpm with the converter locked. My builder thought it was a tuning issue with line pressure. The first build went 2000 miles with a red alto wide band, this time went 86 miles with a kevlar band. The band was cooked, black and pitted.

Before the build, everything worked perfectly, but it had 120,000 miles on it(bone stock from GM), and I will be drag racing the truck this summer. The build was done for strength and reliability only.

At this time, I do not believe that the tune is the problem, I believe it is a build problem. The truck is currently at the trans shop for disassembly.

 

 

What????? Why did you increase the entire Force Motor Current tables?