Before I wrote to check the pin I verified its existance with my main trans tech. He said to be sure I advised air pressure checking the servo while the valve body is out. I didn't because it requires air pressure and knowing where to put it.

There is a good chance that the problem all along was the servo piston seal or the piston itself. I have seen many broken by hi modulator settings.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician