Vaccum Mod In A 4l60e
we prefer to keep the pcs , The overall shift adaptability is much better ,
www.performabuilttransmissions.com
www.performabuilttransmissions.com
The pcm lowers and raises line preasure for more reasons than just throttle position , It monitors temperature , converter slip % and shift error times and ajust preasure acordingly ,A vacume modulaor defeats its ability to do that ,
www.performabuilttransmissions.com
www.performabuilttransmissions.com
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Launching!
Joined: May 2003
Posts: 290
Likes: 0
From: Canadian West Coast
Originally Posted by performabuilt
The pcm lowers and raises line preasure for more reasons than just throttle position , It monitors temperature , converter slip % and shift error times and ajust preasure acordingly ,A vacume modulaor defeats its ability to do that ,
www.performabuilttransmissions.com
www.performabuilttransmissions.com
I can understand the programing issue As for how it works it pretty simple really , its and electronic valve that vents presure by cycling on and off and varying speeds.
But I can definatley understand why that might be a difficult setting to make in programing , So what we do is turn the torx screw in the center 1/4 turn clockwise , which basically shortens the open time by applying more force to the return this causes and across the board 4-6 psi increase , Yet the pcm is not the wiser so it continues with normal control as if there has been no change this works well increases all apply presures and even lockup is improved with no fear of solinoid flooding which can happen when you raise the presure by other means ,
www.performabuilttransmissions.com
But I can definatley understand why that might be a difficult setting to make in programing , So what we do is turn the torx screw in the center 1/4 turn clockwise , which basically shortens the open time by applying more force to the return this causes and across the board 4-6 psi increase , Yet the pcm is not the wiser so it continues with normal control as if there has been no change this works well increases all apply presures and even lockup is improved with no fear of solinoid flooding which can happen when you raise the presure by other means ,
www.performabuilttransmissions.com
