# Service bulletin G\-208448 A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned. - Type: Service bulletin - NHTSA id: 10079362 - Published by NHTSA: 2016\-09\-07 - Manufacturer's number: G\-208448 - Manufacturer's date: 2015\-01\-13 - NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION ## NHTSA's summary 14614 \- SERVICE UPDATE. REPLACE SUSPECT TRANSMISSIONS ON SUSPECT VEHICLES EQUIPPED WITH AUTOMATIC TRANSMISSION \(RPO MYC\). THESE VEHICLES MAY HAVE A TRANSMISSION\-DURABILITY ISSUE DUE TO IMPROPERLY HEAT TREATED LONG\-PINION GEARS, WHICH MAY HAVE BEEN MANUFACTURED BELOW SPECIFICATION FOR SURFACE HARDNESS. OVER TIME, THE GEAR MAY BEGIN TO YIELD AND THEN BREAK, WHICH CAN CAUSE GEAR TEETH TO BECOME DETACHED. IF THIS OCCURS, TRANSMISSION NOISE MAY RESULT, AND THE DRIVER COULD EXPERIENCE REDUCED VEHICLE MOBILITY. A TOTAL OF EIGHT VEHICLES ARE INVOLVED. ## The document No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number. ## Components Transmission and driveline, Automatic transmission ## Vehicles listed - 2014 CHEVROLET SILVERADO 1500 - 2014 CHEVROLET SONIC ## Recalls for the same vehicles and component - [14V152000](/recalls/nhtsa/14V152000.md), 2014-03-31: POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES ## Other bulletins for the same vehicles and component - [PIE0270](/bulletins/10252872.md), 2024-04-08, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT. Engineering Information. - [14204](/bulletins/10248739.md), 2024-01-16, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Inner Tie Rod Torque - [17\-NA\-066](/bulletins/10239647.md), 2023-07-25, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test. - [16\-NA\-130](/bulletins/10232711.md), 2023-03-08, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY. This service bulletin provides information for after installation of a replacement upper valve body, the transmission may have no Reverse and no 2nd gear. - [06\-00\-89\-031D](/bulletins/10201098.md), 2021-09-07, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN; ENGINE. OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification - [990420002L](/bulletins/10200154.md), 2021-08-09, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation. - [PI1150](/bulletins/10190984.md), 2021-04-28, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. Clicking/Rattle Type Noise from Rear of Engine Some customers may comment on a clicking/rattle type noise coming from the engine compartment. This may be caused by the starter shield contacting the transmission case and causing a rattle - [PI0928B](/bulletins/10190976.md), 2021-04-27, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING. Bump, Surge or Vibration at Idle in Drive at a Stop 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 - [06\-00\-89\-031D](/bulletins/10190503.md), 2021-04-20, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification - [150089004C](/bulletins/10188403.md), 2021-03-08, Service bulletin: SUSPENSION:FRONT:MACPHERSON STRUT; SUSPENSION:FRONT:SHOCK ABSORBER; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage. JSON: [/v1/bulletins/10079362](/v1/bulletins/10079362) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20G-208448&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10079362&vehicle=Service%20bulletin%20G-208448)