| 2020 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2019 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2021 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2023 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2022 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2016 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2017 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2018 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2014 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2015 | Kenworth | T880 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2019 | Peterbilt | 330 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2021 | Peterbilt | 330 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2020 | Peterbilt | 330 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2022 | Peterbilt | 330 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2016 | Peterbilt | 330 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2017 | Peterbilt | 330 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2018 | Peterbilt | 330 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2015 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2018 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2017 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2016 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2019 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2020 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2021 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2022 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2023 | Peterbilt | 337 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2014 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2015 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2018 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2017 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2016 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2019 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2020 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2021 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2022 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2023 | Peterbilt | 348 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2017 | Kenworth | T270 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2016 | Kenworth | T270 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2018 | Kenworth | T270 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2015 | Kenworth | T270 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2022 | Kenworth | T270 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2019 | Kenworth | T270 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2020 | Kenworth | T270 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2021 | Kenworth | T270 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2021 | Kenworth | T280 | | Models with 10,000 lb to 12,000 lb Mono-leaf front springs; B71-6019 |
| 2022 | Kenworth | T280 | | Models with 10,000 lb to 12,000 lb Mono-leaf front springs; B71-6019 |
| 2023 | Kenworth | T280 | | Models with 10,000 lb to 12,000 lb Mono-leaf front springs; B71-6019 |
| 2024 | Kenworth | T280 | | Models with 10,000 lb to 12,000 lb Mono-leaf front springs; B71-6019 |
| 2015 | Kenworth | T370 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2016 | Kenworth | T370 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2017 | Kenworth | T370 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2018 | Kenworth | T370 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2021 | Kenworth | T370 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2020 | Kenworth | T370 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2019 | Kenworth | T370 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2022 | Kenworth | T370 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2022 | Kenworth | T380 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs; B71-6019
Models with 14,000 Taperleaf Springs; B71-6020 |
| 2023 | Kenworth | T380 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs; B71-6019
Models with 14,000 Taperleaf Springs; B71-6020 |
| 2024 | Kenworth | T380 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs; B71-6019
Models with 14,000 Taperleaf Springs; B71-6020 |
| 2025 | Kenworth | T380 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs; B71-6019
Models with 14,000 Taperleaf Springs; B71-6020 |
| 2022 | Kenworth | T480 | | Models with 10,000 lb to 12,000 lb Mono-leaf front springs; B71-6019
Models with 10,000 lb to 14,600 lb Taperleaf Springs; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2023 | Kenworth | T480 | | Models with 10,000 lb to 12,000 lb Mono-leaf front springs; B71-6019
Models with 10,000 lb to 14,600 lb Taperleaf Springs; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2024 | Kenworth | T480 | | Models with 10,000 lb to 12,000 lb Mono-leaf front springs; B71-6019
Models with 10,000 lb to 14,600 lb Taperleaf Springs; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2025 | Kenworth | T480 | | Models with 10,000 lb to 12,000 lb Mono-leaf front springs; B71-6019
Models with 10,000 lb to 14,600 lb Taperleaf Springs; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2017 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2016 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2018 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2014 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2015 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2020 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2019 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2021 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2023 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2022 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2024 | Kenworth | T680 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2022 | Peterbilt | 536 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2023 | Peterbilt | 536 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2024 | Peterbilt | 536 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2022 | Peterbilt | 537 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2023 | Peterbilt | 537 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperlead Springs and Set Back Front Axles; B671-6020 |
| 2024 | Peterbilt | 537 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperlead Springs and Set Back Front Axles; B671-6020 |
| 2025 | Peterbilt | 537 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 16,000 lb to 20,000 lb Taperlead Springs and Set Back Front Axles; B671-6020 |
| 2022 | Peterbilt | 548 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2023 | Peterbilt | 548 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2024 | Peterbilt | 548 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2025 | Peterbilt | 548 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2014 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2015 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2016 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2017 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2018 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2019 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2020 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2021 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2022 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2023 | Peterbilt | 567 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019
Models with 20,000 lb Taperleaf Springs and Set Back Front Axles; B71-6020 |
| 2021 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2019 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2020 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2022 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2023 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2024 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2017 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2016 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2018 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2014 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2015 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |
| 2013 | Peterbilt | 579 | | Models with 10,000 lb to 14,600 lb Taperleaf Springs and Set Back Front Axles; B71-6019 |