P1810, slam shifting, can HPT help?

[GeoJB]

I have a P1810 (Pressure Switch Manifold) Ses light. The car shifts really hard, like slam shifting a manual trans car. Feels really bad.
I understand this is a default mode the car goes into.
I took it up to the Trans shop. They plugged in their Diagnostic scanner, It said “the manifold pressure solenoid is malfunctioning” Sorry it’s not a direct quote.
They did not have time to put up on a lift and check the real pressures. Or look for anything else.
Reverse looked normal. Forward gears showed errors, I don’t remember exactly what was said or showed. It had to do with the “on-off, off-on-off, positions, etc…” with each of the settings. I don’t understand it.
It will take about 4 hours of labor to pull the side panel and check to solenoid and they would also check for any other parts failing or need replacing.
The trans was rebuilt a year ago (October) by the same folks.
That will cost me approx $250.00. aint’ got it! Right now.
So, in the mean time until the cash come in.
Using HPT, Can I change the force motor currant to lessen the slamming of the shifts?
Or, anything else that I can do?

[flame]

If you clear the code and drive does it come back on right away and go to max pressure? If so then it would seem that the pressure control solenoid has failed and is not capable of controlling the pressure. If thats the case changing the fmc tables would have no effect.

[GeoJB]

Yup, found that out.
the lights been on for a day or two. I dropped the FMC by 30Ma may be a slight decrease in the slamming effect.
On a side note with the decrease with the FMC there is a slight increase in the trans temp.
I know the only right way is to get in there and replace the solenoid.