Hi Everybody

I'am having issues with a Toyota 7FBCU32 S/N-62245. Under load the tilt drifts forward on it's own. My question is what holds the pressure the spool has no seals on it. The main valve has a sol and what looks like a small keeper valve in the body of the main valve. I'am thinking this little valve holds the pressure, but just wanted a second opinion.

Thanks in advance
Dave