Iíve got a í85 GMC van (6.2L dsl) that will not lock up the torque
converter. Was at cruise speed under minimal load when converter
unlocked and hasnít locked since. Have voltage at trans connector.
Solinoid checks ok with air pressure. Transmission doesnít appear to
have vacuum line connected (never has since Iíve owned it) and vacuum
pump has been inoperative for a long time anyway. Pan and filter are
off now, would like to test further before reassembly.
My knowledge of auto transmission repair is somewhat limited but if
there are any reasonably simple diagnostic tests that can be performed
here, Iím a pretty fast learner. Any help or suggestions would be
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