Harsh Shifts

Information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares – 2015-2021 GM Passenger Cars and Trucks

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2017 Chevrolet SS

NHTSA ID Number: 10187372 Manufacturer Communication Number: 16NA019   Summary This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.   260 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ATS 2015-2019 CADILLAC CT4 2020-2021 CADILLAC CT5 2020-2021 CADILLAC CT6 2016-2020 CADILLAC CTS 2015-2019 CADILLAC ELR 2015-2017 CADILLAC ESCALADE 2015-2021 … Read more

Drive Quality Degradation and/or Transmission Harsh Shifts – 2014-2015 Chevrolet Spark

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2015 Chevrolet Spark

NHTSA ID Number: 10079725 Manufacturer Communication Number: GCUS-3-401 Summary 20710 – CUSTOMER SATISFACTION PROGRAM. VEHICLES EQUIPPED WITH A CONTINUOUSLY VARIABLE RATIO AUTOMATIC TRANSMISSION (CVT) (RPO M4M), MAY HAVE A CONDITION IN WHICH THE DRIVE PULLEY AND BELT COULD BE DAMAGED IF THEY EXPERIENCE AN UNEXPECTED HARSH SHIFT EVENT. DEALERS ARE TO REPROGRAM THE TRANSMISSION CONTROL MODULE (TCM) … Read more

Information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts – 2015 Cadillac Chevrolet GMC

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2015 Chevrolet Corvette

NHTSA ID Number: 10138017 Manufacturer Communication Number: 14-07-30-001G   Summary This informational bulletin explains how to diagnosis and perform a transmission fast learn procedure to fix a harsh shift at low speeds. Shifts that feel too firm (harsh), slips or flares.   Low mileage vehicles equipped with the 8L90 automatic transmission with shifts that feel too firm … Read more