MAKE: Chevy MODEL: S-10 Blazer YEAR: 1999 MILES: 140k ENGINE: 4.3 I have a p1870 transmission torque converter slip code. Poor mpg. Bluetooth scanner with Torque app shows 150+ TCC slip on level ground and steady mph. Also a slight amount of fluid leaks from small tranny vent tube while driving. Fluid temp at 205 degrees after 30 minutes of driving. Tranny Fluid pressures 80 psi at idle, and about 120 psi on highway. Dropped tranny pan. Fluid red. No debris. Discovered previous owner had already tried Transgo shift kit with TCC regulator/isolator fix. I thought it might be severe bore wear, so I installed a new valve body with reamed bore and Sonnax regulator/isolator sleeve and valves. Cleared code, but still no joy, P1870 and slip continues. To avoid tranny drop I tried one last ditch effort. Checked TCC apply valve for 1/2" of travel. Checked fine. I removed TCC apply solenoid, removed its screen, and put a check ball in its snout. Should have made engine stall in drive while stationary (brakes applied) as converter would be locked. No stall or stumble. So I dropped tranny. Converter looks brand new. No burn marks, perfect paint. Clutch packs not burnt. Drum where band rides still has scotch brite marks where someone removed any glazing. This tranny appears to have been recently rebuilt. I purchased the blazer a few months ago. The only potential problems I see are rear stator bushing wear and input/turbine shaft wear. See photos. The rear stator bushing is worn to the point where one of the oil grooves is completely gone. 180 degrees from that wear, the bushing has not even touched the shaft journal. Photos show bushing at worn spot and unworn spot. The turbine shaft where it inserts into the torque converter is dished and wore a fair bit. O-ring was ok or at least not flat. I removed the o-ring for the photo. My question is if this kind of wear can cause TCC slip? Is this my smoking gun? I plan to replace turbine shaft and stator bushing.