The main flaw of the automatic that causes premature failure of the band and 3-4 friction pack is low line pressure. under heavy acceleration, the slip time of the frictions simply produces too much heat for the relatively low amount of frictions and under-cooled transmission fluid to absorb.
With a simple 5 cent resistor and an auxiliary transmission cooler, you can get the benefits of raising line pressure and reduced heat throughout the rev range. The fn4a-el transmission uses a variable force solenoid to control line pressure. the ecu changes the amount of current sent to the solenoid to either lower or raise the pressure. less current=more pressure. the stock range is 2.4-7.3 ohms. By adding a 1-2 ohm resistor depending on how you want shift feel, it will artificially lower the current sent from the ecu and raise line pressure. the control wire for the solenoid that needs to be cut and the resistor installed is the black one coming from the transmission valve body.
I don't believe that this will cause the transmission light to turn on, as the code for the pressure control solenoid is only activated if it is stuck at a certain voltage after engine start.
I will be testing my theory in the next week or so.
With a simple 5 cent resistor and an auxiliary transmission cooler, you can get the benefits of raising line pressure and reduced heat throughout the rev range. The fn4a-el transmission uses a variable force solenoid to control line pressure. the ecu changes the amount of current sent to the solenoid to either lower or raise the pressure. less current=more pressure. the stock range is 2.4-7.3 ohms. By adding a 1-2 ohm resistor depending on how you want shift feel, it will artificially lower the current sent from the ecu and raise line pressure. the control wire for the solenoid that needs to be cut and the resistor installed is the black one coming from the transmission valve body.
I don't believe that this will cause the transmission light to turn on, as the code for the pressure control solenoid is only activated if it is stuck at a certain voltage after engine start.
I will be testing my theory in the next week or so.
