{"nhtsa_id":10227766,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-12-12","date":"2022-10-29","document_id":"2102122REVA","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN","mfr_system":null,"summary":"Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may comment on one or more of the following: Harsh shifts. Poor shift quality, with light pedal.(Sales Codes ETM and ETN Only). Poor shift quality, 32-48 kph (20-30 mph), at low rpm with light to mediumpedal apply, typically tipping in from zero pedal.(Sales Codes ETM and ETN Only). Coasting shift bump with exhaust brake and/or tow/haul active.(Sales Codes ETM and ETN Only). Poor shift quality, often when increasing pedal during a shift.(Sales Code ESB Only). Squawk/chirp/squeak type noise during a 3-4 upshift.(D2 Only). Poor 1-2 upshift quality.(D2 with ETM or DD/DP with Sales Code ESB Only). When decelerating from a 1 to 2 gear shift, the vehicle may have a harshshift. From a 1 to 2 gear change there may be a perceived bump feeling, whilehaving a light pedal(Sales Codes ETL and ETN Only). A harsh shift from a 2 to 3 gear shift while at almost or wide openthrottle. A harsh shift from a 3 to 4 shift and heavy on the pedal, lifting offthe pedal, then back on the pedal again. While coasting down a grade, an abrupt deceleration may be felt. A clunk heard when shifting from park to reverse or drive. Cold engine flare during a shift. A delay when coasting down, vehicle is in a downshift at low speedsand then trying to accelerate. (The vehicle will have a hesitation as the vehicle tries to change gears to accommodate the new pedaldemand). Excessive shifting(DD and DP Only). Engine flare caused by the transmission releasing the clutch too early duringa 1 to 2 shift. Poor shift quality. Shift or gear hunting. The following software enhancement is also available: Stored faults can only be cleared by a diagnostic scan tool, this softwarewill allow the TCM to self clear.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10227766-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10227766-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10227766","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"RAM","model":"3500","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_ram_3500"]},{"make":"RAM","model":"4500","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_ram_4500"]},{"make":"RAM","model":"5500","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_ram_5500"]}],"as_of":"2026-10-19","note":"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.","attribution":[]}