(09-13-2024, 01:54 AM)danstrayer2 Wrote: Help!   
   1998 JLX 1.8.  4wd.  I have a recurring 0741 code, Torque Converter Clutch lockup, stuck off.
  I pulled the AT pan, tested solenoid, that is fine, blew out the passages around that w/ air. New filter. New oil. New O ring on solenoid.
 (All of this happened after pulling motor to replace oil pump in the engine)  Took it out on chilly morning after clearing code, 0741 set again within a mile at highway speed.  Stopped, cleared code, drove home  @ highway speed,  CEL did not come back on.

     After the motor re-install, I had a shift solenoid code, dropped pan, took the 2 solenoids out, but tested them in place first w 12 v applied, and # 2 was weak. Took them out, blew air, got them working fine.  That code did not come back. Piece of dirt/debris in the the valve. Then the TCC code problems began, still a piece of debris in there? How to get it out? 
Can engine temp or ECT sensor have a bearing on this? Will a transmission flush remove debris from valve body? (that's what I think this is, piece of crap in the valve body)
 Thanks to all in advance.

(09-16-2024, 02:07 AM)fixkick Wrote:

(09-13-2024, 01:54 AM)danstrayer2 Wrote: Help!   
   1998 JLX 1.8.  4wd.  I have a recurring 0741 code, Torque Converter Clutch lockup, stuck off.
  I pulled the AT pan, tested solenoid, that is fine, blew out the passages around that w/ air. New filter. New oil. New O ring on solenoid.
 (All of this happened after pulling motor to replace oil pump in the engine)  Took it out on chilly morning after clearing code, 0741 set again within a mile at highway speed.  Stopped, cleared code, drove home  @ highway speed,  CEL did not come back on.

     After the motor re-install, I had a shift solenoid code, dropped pan, took the 2 solenoids out, but tested them in place first w 12 v applied, and # 2 was weak. Took them out, blew air, got them working fine.  That code did not come back. Piece of dirt/debris in the the valve. Then the TCC code problems began, still a piece of debris in there? How to get it out? 
Can engine temp or ECT sensor have a bearing on this? Will a transmission flush remove debris from valve body? (that's what I think this is, piece of crap in the valve body)
 Thanks to all in advance.

p0741,  I thank is RPM drop.  the TCM (inside PCM)  closes the TCC and then see if the RPM drops. if not the TCC is failing in some way.
even the TC it self can.(locker)
is this not the year the PCm (TCM) solenoid lockup output pin does not use a relay (TCC) the PCm drives the solenoid directly.
, one way to learn that is make jumper wire from that PCM TCC output in or to tranny pin same name and monitor it driving

if that line goes to 12vdc at the TC lockup moment then the problem is in the box.
make sure tranny ground is good first. for sure if you see other shifting solenoid errors, at random.

some of these cars have Tranny ground strap that gets wrecked at motor pull.

yes ect OID scan hot,  180f is what it should be hot, or more, and is at 150f all the time the PCM why blockup  TCC as does fall 4wd modes (switch) reading wrong in 2wd.
most these cars TCC is disAbled in 4wd, but the PCm know  that, and be a shame it is so confused to ignore 4wd switches closed falsely
.