19-AT-023G

GROUP
AUTOMATIC
TRANSMISSION
DATE
Technical Service Bulletin
SUBJECT:
SEPTEMBER 2019
NUMBER
19-AT-023G
MODEL(S)
G70 (IK)
G80 (DH)
G90 (HI)
AUTOMATIC TRANSMISSION STALL TEST PROCEDURE
Description: If you are servicing a vehicle with a transmission slipping concern, follow the Service
Procedure shown below and perform a stall test. This TSB provides a procedure to test each clutch in
the transmission. If the vehicle fails the stall test, replace the transmission.
 PASS: Stall speed is between 1700~2900 rpm (See shop manual for stall speed).
 FAIL: Engine revs to redline limit (6,000~6,500 rpm). If so, replace the transmission.
2019~ G80 (DH)
Applicable Vehicles: 2019~ G90 (HI)
2019~ G70 (IK)
WARRANTY INFORMATION: Normal Warranty applies
SERVICE PROCEDURE – Stall Test Procedure
1. Check the automatic transmission fluid level according to TSB 19-AT-011H. Add SP-IV-RR ATF,
P/N 00232-19052, if necessary, to bring the level within the “HOT” range.
2. Apply the parking brake and place blocks in front of and behind both front wheels.
CAUTION
Do not allow anyone to stand in front of or behind the vehicle.
3. Start the engine and move the shift lever to “R”.
4. Press and hold the brake pedal, then fully depress the accelerator for 3 seconds and record the
highest engine speed observed. Perform the test only one time to prevent excessive ATF
temperatures.
CAUTION
Do not hold the throttle fully open for more than 3 seconds. Release the throttle and
allow the engine to idle in “P” for 15 seconds.
NOTE: Record the highest engine speed observed during the 3 second test.
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
SUBJECT:
5.
AUTOMATIC TRANSMISSION STALL TEST PROCEDURE
Confirm the stall speed is within the specifications shown in the related shop manual
(approximately 1700~2900 rpm at sea level, depending on model). If the stall speed is higher
than specification or the engine revs to the redline limit, one or more clutches may be slipping.
6. Move the shift lever to “D”, and then repeat Steps 4~5 one time. Go to Step 7.
7. Move the shift lever to “D” and pull the right paddle shifter (+) to select Manual Mode 2 and
repeat Steps 4~5 one time.
8. Test the 6 clutch and 4&OD clutches: Drive in Manual Mode 6th gear and confirm the clutch
does not slip or rev to redline at full throttle.
NOTE: The stall test procedure tests the following brakes and clutches.
BRAKE
CLUTCH
SHIFT LEVER POSITION
8LR
27
UD
REVERSE
X
DRIVE
X
X
MANUAL MODE “1”
X
X
MANUAL MODE “2”
DRIVE IN MANUAL MODE “6”
TSB #: 19-AT-023G
6
4&OD
35R
X
X
X
X
X
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