Transfer case help….M1078 2001

[AdiBarbu]

Ok. I bought off e-bay another valve assembly. It looks brand new, never installed. Coil 3.4 ohms.
I got also a PWM generator. 0-30 V and 0- 30 mA.
I hooked the PWM generator to the solenoid and I couldn't hear or see a thing.
Looks like my cheap voltmeter can show the voltage if it is there. At lower frequencies, due to poor refresh rate it can not show the voltage, but higher frequencies, no problem.
Oscilloscope did not arrive yet.
Will install the new valve soon to see any difference.
Maybe 30 mA are not enough to move the spool inside coil?

 

[AdiBarbu]

So I got a 0-350 psi gauge. Gauge come with the needle at 35 psi out of the box, so no accurate, but shows something.
C7 on "mode" shows about 30psi.
Main about 190 psi when Mode Off.
When I press Mode, Main pressure drops to about 110 psi.
To me, this looks clearly like a big leak in C7 piston, or, less probable because oil is clean. the clutches are worn badly.
What do you think?
Thanks.
MODE OFF
MODE ON