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August 20, 2025 Other

Condition, Chassis Affected, and Warranty sections updated with the following verbiage “E311 must be...

Kenworth technical service bulletin E311 for 2019-2022 Kenworth T680, 2019-2022 Peterbilt 579 and 2019-2022 Kenworth T800 and others.

Bulletin number
E311 (E311)
Component
Power train
Summary
Condition, Chassis Affected, and Warranty sections updated with the following verbiage “E311 must be flagged and open in Service Information Record (SIR) at the time of RO open date to qualify.” Also, “Through Standard Warranty or any applicable active Extended Warranty” verbiage was removed from Warranty section.

Owners of these vehicles have filed 14 complaints in the transmission category.

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