View Single Post
Old 06-21-2013, 11:07 PM   #8
clinebarger
Senior Member
 
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
Re: 4l80e whine, could use some help

Quote:
Originally Posted by Shortie View Post
How does gm monitor line pressure anyways in the electronically controled trannys? Just wondering cause in hp tuners when tuning line pressure it's done directly with a line pressure psi.
Posted via Mobile Device
The PCM does not monitor line pressure, The PCM controls the PCS solenoid with varying current (amp's). In theory it will produce the correct line pressure.

The line pressure tables in HPtuners are based on the same theory.
Attached Images
 
clinebarger is offline   Reply With Quote