Transmission shift problems - looking for ideas
Hey, I'm researching a problem that just started with my 95 Intrepid 3.3L. Maybe someone can give me insight.
314,000 miles. I change the trans fluid every ~35k miles. Original trans (never rebuilt)
I have a code 12 and code 33 blinked out on the dash, battery disconnected in the last.... and A/C relay circuit. The relay has been a problem for about three weeks. I have been too lazy to fix it.
The trans started shuddering on the 2-3 shift about 1 week ago.... doesn't slip in any gear though. Today I drove her, the transmission downshifted from 4th to 2nd under light throttle at 50mph which lurched the car forward and spooled the motor up. I bumped it into neutral immediately and rolled for 1/2 mile, back into drive to crawl the next hill.... It locked in 2nd gear "limp" mode until I was able to pull over and restart the car clearing limp mode. This happened once more on the way home. During the trip I give it 3/4 pedal up a hill, no slip. The next hill I pushed it to the floor, the transmission did NOT downshift at 55mph so I tried it one more time at 45mph but still no down shift...... no slipping either.
This leads me to believe the transmission isn't toast, but there is a control problem somewhere. I'm a very conservative driver so I have no idea how long it's been since the trans wouldn't downshift.
The fluid is red, topped off Valvoline ATF +4, smells and looks just like it should though it's due for another change soon.
I do not have any speedo problems, electrical or other problems. The engine runs perfectly. I changed a bad crank sensor about 1000 miles ago which was the first time the car has left me stranded.