I have a 200-4R tranny in a 1988 Olds and having problems with the
lock-up converter.  When cold for the first few miles with the
selector in the D or D(O) position all is fine, but after that the
converter will lock up every time it shifts into second, bogging the
engine; no poop and terrible mileage.  I recently performed an oil and
filter change and with the pan off, removed the lock-up converter
solenoid to make sure the orifice wasn't restricted-all was fine.
After reassembly, I connected a 12v test light to the diagnostic port
that feeds the signal to energize the solenoid so to monitor its
operation.  Took the vehicle for a road test and all works fine-signal
comes on at 45 mph and drops out upon heavy acceleration and no
throttle(high manifold vacuum).  As a back-up test, I disconnected the
harness at the tranny and went for another road test-same results lock-
up with second gear upshift.  The converter won't disengage till the
vehicle is almost to a stop-comes close to stalling the engine.  A
review of the 200-4R hydraulic circuit shows two conditions must be
present to have apply pressure to lock the converter-(1)hydraulic
pressure to shift the converter clutch spool and (2)solenoid
activation to block the bleed orifice so the converter signal
hydraulic pressure can shift the lock-up spool.  With the solenoid
being removed and examined for blockage and finding nothing plus an
electrical checkout, I'm puzzled.  Could there be something
temperature related, since lock-up works fine for the first few
miles?  A feel of the cooling line out of the tranny is moderately
warm- nothing excessive.  Could there be an internal leak or a weak/
broken converter clutch spool return spring?  I need someone with
expertise/experience with the 200-4R as I'm sure someone else has had
this problem.