Wish I had a suggestion... I'd try the easy checks first. I would post your problem to some other forums (G-Body, El Camino, etc.). Poking around the trans internals may be the only way to find out the cause... which is tough on a daily driver. On Fri, Dec 24, 2010 at 11:13 PM, John Christensen <johncgg@xxxxxxxxx> wrote: > Just got this off a forum for G-body: > > Re: 200 R4 Lockup problems > ________________________________ > All it takes is just a particle of debris to cause the internal valves or > solenoids to stick...Lockup solenoid staying energized (not likely),lockup > solenoid sticking (highly likely) or converter clutch apply valve sticking > (very likely), or few other very unlikely causes. Unplug the 4 pin connector > on drivers side of trans, take for short drive; if still locking up in > second, it is the solenoid sticking (serviceable from inside the pan) or the > apply valve (located in side of front pump assembly, the valve CAN be > serviced in car). > > I am thinking the TCC apply valve could be the main culprit, because when I > take the power away, it still does not disengage. Is there a replacement > valve? Or is it just check balls and teflon seals? > > More research is needed. Thinking out loud to the car crowd... > JC Rules: Please play nicely with others. -List members page (text & pic links): http://www.myelcamino.net/eclist.htm -List members page (all pics): http://www.myelcamino.net/ec_list.htm