Division: Automotive Section Title: Transmission/Transaxle
TSB No. TS 08 12018R
SUBJECT: AUTOMATIC TRANSMISSION HARSH SHIFT WITH MIL ON AND
EITHER OF THE FOLLOWING DTCS; P0783, P0734
MODEL(S): FORENZA/RENO (RQ420)
CONDITION: Transmission will have a harsh shift from third to fourth gear. Malfunction Indicator
Lamp (MIL) will be ON with DTCs P0783 (3-4 Shift Malfunction), P0734 (Gear 4
CAUSE: Brake C piston seal has failed.
CORRECTION: A new C piston is available to repair transmission on the bench without
replacement of the transmission assembly. Please follow the procedure below to
remove and install the C Piston and Disk Set C & D.