Cooler Line Pressure Very High

[SNOWBIRD]

Hi ,i Just Took My 200r4 Cooler Line Pressure ...40 Psi At Idle And As Soon As I Raise Rpm My Guage Jumps To 160 Psi Wow....so I Bypassed My Two Trans Coolers Thinking I Could Find A Restriction In The Coolers And The Pressure Went Down To 100 Psi ...wow Still To Much,this Is A Brand New Rebuilt Trans And The Main Line Pressure Is At 270 Psi But I Am Worried That I Will Damage ...thrust Bearing On Crank........opinions Please ....i Am About To Send It Out To Another Shop .......trans Is A Nlu

 

[SNOWBIRD]

O,WELL,I guess all the trans experts are gone for the night:smile:

 

[chris718]

if the pressure is that high i would say there could be a chance of increased wear on the thrust bearings load bearing surface being it is a non lock up converter .this doesnt however mean it would fail.i suggest you measure thrust with the trans installed on the engine in the car with a magnetic base dial indicator.beat the car up for 30 miles and recheck it .this will give you real data and not someones assumption .if it s got .004 " more than drop the max line and consequently cooler pressure and road test.if its starting to wear the thrust pull it out before its garbage and enjoy your collected data and direction of correction it has shown you.:wink:

 

[SNOWBIRD]

CRIS ,,what would be a MAXIMUM PSI in the cooler line when engine is under load ....

 

[chris718]

i have no collected cooler psi data from a non lock up 2004r converter ,only a lock up.Charges over 120 psi can destroy the thrust bearing as some have found out the hard way.

 

[Alky V6]

Way too much converter charge. Get it corrected now.

 

[SNOWBIRD]

I checked my thrust play ,everything ok ,am i to believe that my problem would be in the pressure regulator valve system...the front pump is a 13 vane and the boost walve is a 570 ....

 

[bison]

I checked my thrust play ,everything ok ,am i to believe that my problem would be in the pressure regulator valve system...the front pump is a 13 vane and the boost walve is a 570 ....

The number of vains does not indicate the output pressure. The 13 vain is at risk of failure in your application form the high pressures and the weakened (from extra veins) pump body. I would replace the regulator valve with a new stock one from GM if its been modified in any way. Your thrust main is at risk especially if trying to build boost on the brake while the engine is cold.

 

[SNOWBIRD]

where do i purchase PRV ...GM DEALER...?????????? I will go back to a .500 boost valve to put less stress on 13 vane rotor

 

[bison]

where do i purchase PRV ...GM DEALER...?????????? I will go back to a .500 boost valve to put less stress on 13 vane rotor

GM has the valves.

 

[J-B Racing]

This is exactly what happened in my case. Dropped the Crank twice in 2 Months..And the tranny builder was pointing his finger to my Engine being built wrong...:frown: I have been running it for over 10 years....