5r55e main pressure problem

[cooldrool]

my trans is suffering from low main pressure...im looking at the SUPERIOR shift kit and the SONNAX valve..but SUPERIOR makes one too...is one better than the other?

 

[PopRichie77]

How low is the line pressure? A shift kit does not boost the pressure. The boost valve is only 5 psi increase.
You can call either one and ask a tech to verify.

 

[cooldrool]

ill have to talk to the mechanic to get the #'s on the pressure...ive posted about this twice before but havent gotten any response

 

[PopRichie77]

There are 2 pressure regulators, the (main pressure regulator and boost valve), which is valves and springs and the EPC solenoid. Line or main pressure can be low from a blown valve body gasket or a bad pump. If line pressure is ok and EPC pressure is low, could be caused by a blown valve body gasket, bad EPC solenoid, or an internal seal leak.
There is more than one thing that can cause low pressure, your mechanic should know this.

 

[cooldrool]

my posts "5r55e shift flare" and "5r55e nightmare" explains the origins of all this