2290 transmission

[chad-sd]

I have a 12 speed 2290, Stalls in reverse and lugs in first ps. Seems to work great in 2nd and 3rd. Hooked a gauge and c3 had 20 psi in reverse and 1st. Cleaned c1-c4 spool valves, and cleaned c3 twice, still no change. If i understand correctly, should have no pressure on c3 in reverse and 1st. Any other valves to look at, or could i have a gasket that is bad in the valve body. Any advice is appreciated thanks.

 

[1370rod]

C3 is your problem, if you have pressure in C3 when in rev or first the spool is still open a bit. If the C3 clutch is damaged now your problem will remain with no pressure in the C3 circuit. The spool has to be free enough that you can easily push it all the way up and it will slide down at out the bore on its own, Rod.

 

[chad-sd]

Found this on top of the c3 spool valve, valve could not close all of the way. Works great now. Any idea where it came from. Thanks for the advice it is greatly appreciated.

 

[Roger Link]

I think the star washer holds a check ball in place in the valve body, you mite want to take the valve off, give it a good cleaning and see if the ball and spring are gone.

 

[1370rod]

Roger is correct the washer is from a small check valve in the control valve, it holds a spring and check ball down. Glad to see you found the problem, Rod.