21-AT-015G

GROUP
AUTOMATIC
TRANSMISSION
DATE
AUGUST, 2021
Technical Service Bulletin
SUBJECT:
NUMBER
21-AT-015G
MODEL(S)
G70 (IK), G80 (DH),
G80 (RG3), GV70 (JK1),
GV80 (JX1), G90 (HI)
AUTOMATIC TRANSMISSION INCORRECT RATIO DTC P0731,
P0732, P0733, P0734, P0735, P0736, P0729, P076F & P0730
This TSB supersedes TSB 19-AT-012G to add G80 (RG3), GV70 (JK1), GV80 (JX1).
DESCRIPTION: This TSB provides a procedure to diagnose and repair a transmission for the
following Incorrect Ratio DTC (transmission clutch slipping more than 200 rpm in gear).
DTC
DESCRIPTION
P073100
Gear 1 incorrect ratio
P073200
Gear 2 incorrect ratio
P073300
Gear 3 incorrect ratio
P073400
Gear 4 incorrect ratio
P073500
Gear 5 incorrect ratio
P072900
Gear 6 incorrect ratio
P076F00
Gear 7 incorrect ratio
P073000
Gear 8 incorrect ratio
APPLICABLE VEHICLES:
2019~
2019~20
2021~
G70 (IK)
G80 (DH)
G80 (RG3)
2019~ G90 (HI)
2021~ GV80 (JX1)
2022~ GV70 (JK1)
WARRANTY INFORMATION: Normal Warranty applies
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
SUBJECT:
AUTOMATIC TRANSMISSION FLUID LEVEL
SERVICE PROCEDURE:
1. Connect a GDS and check for DTC. Record the DTC and delete the DTC.
•
•
If any solenoid DTC are found, refer to TSB 21-AT-003G or shop manual and follow the
repair procedure.
If no solenoid DTC are found, refer to the appropriate shop manual, Automatic Transmission
section and replace the transmission.
NOTE: A Prior Approval (PA) request will need to submitted prior to performing the repair.
TSB #: 21-AT-015G
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