A/T - 4L30E MIL ON/DTC P1870 Stored in PCM
25.
Remove the selective washer from the center support housing (Figure 11).
26.
Remove two oil passage 0-rings from the main case (Figure 12). Discard them.
27.
Install two oil passage 0-rings on the main case (8-96014-270-0 0-Ring, Case Drain Back 2x). Lube them with ATF (Figure 12).
28.
Compress the reverse spring seat with Special Tool P/N J-23327 (Reverse Spring Seat Compressor) (Figure 13).