NHTSA ID Number: 10113691
Manufacturer Communication Number: PI0928E
Summary
This preliminary informational bulletin provides repair information for a customer concern of a bump, surge or engine
vibration while stopped at idle with the transmission in Drive and their foot on the brake.
Condition/Concern
Bump feeling, a surge or an engine vibration while stopped at idle with the transmission in Drive and their foot on the service brake.
Note: This condition is only when stopped at idle with the transmission in Drive and foot on the service brake.
Parts
| Part Number | Description | Qty |
24273076
Genuine GM Plate Part# 24273076
| Plate Kit, 1-2-3-4 Clutch | 1 |
| 24259453
No products found. | Piston, 1-2-3-4 Clutch | 1 |
9 Affected Products
Vehicles
1 Associated Document
Manufacturer Communications
Bulletin No.: PI0928E
Date: Jun-2015
MC-10113691-9999.pdf 162.748KB
NHTSA ID Number: 10139426
Manufacturer Communication Number: PI0928D
Summary
This preliminary informational bulletin provides repair information to correct a customer concern of feeling a bump, surge or vibration at idle in drive, at a stop.
1 Associated Document
Manufacturer Communications
Bulletin No.: PI0928D
Date: Jan-2015
https://www.nhtsa.gov/recalls?nhtsaId=10139426
NHTSA ID Number: 10094513
Manufacturer Communication Number: PI0928C
Summary
THIS PRELIMINARY BULLETIN PROVIDES A PROCEDURE TO REPLACE THE 1-2-3-4 CLUTCH HOUSING IF THE CUSTOMERS CONCERN IS A BUMP, SURGE OR VIBRATION AT IDLE IN DRIVE AT A STOP.
NHTSA ID Number: 10070121
Manufacturer Communication Number: PI0928C
Summary
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
1 Associated Document
Service Bulletin Document
Bulletin No.: PI0928C
Date: September, 2014
SB-10070121-9133.pdf 931.481KB
NHTSA ID Number: 10071583
Manufacturer Communication Number: PI0928A
Summary
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
1 Associated Document
Service Bulletin Document
Bulletin No.: PI0928A
Date: September, 2013
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SEOCONTENT-START
Bulletin No.: PI0928E Date: Jun-2015 Subject: Bump, Surge or Vibration at Idle in Drive at a Stop Models: 2013-2014 Buick Encore 2012-2014 Chevrolet Cruze, Sonic 2013 Chevrolet Tracker, Trax Equipped with 1.4L (RPOs LUJ, LUV) and 1.8L Engine (RPO 2H0, Mexico Use Only, Engine Not Used in US and Canada) and 6T40 Automatic Transmission (RPOs MHB, MH8) Vehicles Built Prior to August 1, 2013 Attention: This PI also applies to any of the above models that may be Export vehicles. This PI has been revised to update the Equipped with Information. Please discard PI0928D. Condition/Concern Some customers may comment on a bump feeling, a surge or an engine vibration while stopped at idle with the transmission in Drive and their foot on the service brake. Note: This condition is only when stopped at idle with the transmission in Drive and foot on the service brake. Recommendation/Instructions This condition may be caused by the transmission Neutral Idle feature. When the service brakes are applied and the vehicle speed, throttle position, and transmission temperature are within the calibration defined limits, the TCM commands the transmission to Neutral. Important: The Neutral Idle feature will only function when transmission fluid temperature is 37°C (99°F) or greater. Verify that the transmission fluid temperature is 37°C (99°F) or greater before diagnosing this condition. When the concern occurs, move the transmission shift lever to the manual position. Moving the transmission shift lever to the manual shift position will prevent the Neutral Idle feature from functioning. If the concern is eliminated by moving the transmission shift lever to the manual position, it is caused by the Neutral Idle feature and variation in the 1-2-3-4 clutch fiber plates. The 1-2-3-4 clutch fiber plates should be replaced with the part number listed below. This is a kit that contains two clutch fiber plates. The 1- 2-3-4 clutch piston should also be replaced at the same time. If the concern is not eliminated by moving the transmission shift lever to the manual position, it has a different cause and further diagnosis is required. Important: These clutch plates will only correct a continuous, on/off bump, surge or vibration feel that occurs while stopped in Drive with a foot on the service brake. These clutch plates will not eliminate the single bump feeling that occurs as the vehicle comes to a stop and the transmission enters neutral. These clutch plates will not eliminate the single bump feeling that occurs when the service brake is released and the transmission engages the 1-2-3-4 clutch. These single bump feelings are normal and cannot be eliminated. For diagnosis purposes, a typical Neutral Idle bump is illustrated in the GDS2 snapshot below. When Neutral Idle is activated Transmission ISS will nearly match Engine Speed. When Neutral Idle is deactivated, 1st gear will be engaged and Transmission ISS will drop to zero as long as the vehicle is stopped. The variation in the 1-2-3-4 clutch fiber plates create the variation in Transmission ISS and the small spikes in the Transmission OSS. These Transmission OSS spikes cause Neutral Idle to be commanded on/off/on/off as seen below creating the bump or surge sensation. 1 Parts Information Part Number Description Qty 24273076 Plate Kit, 1-2-3-4 Clutch 1 24259453 Piston, 1-2-3-4 Clutch 1 Warranty Information For vehicles repaired under warranty, use: Labor Operation Description Labor Time 8467352 Low and Reverse and 1-2-3-4 Clutch Housing Overhaul Use Published Labor Operation Time
SEOCONTENT-END
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