Commercial Truck Forums

Manufacturer specific forums for owners of semi trucks and heavy duty vehicles:

  1. Freightliner Forum

    Ownership, maintenance and mechanical issues forum for all Freightliner models, including Cascadia, Century, Classic, Coe, Columbia, Condor, FLD, M2, and Coronado
    Discussions:
    3,450
    Messages:
    33,040
    Latest: Differential Identification? dajain, Jul 14, 2026 at 7:10 PM

  2. International Forum

    Ownership, maintenance and mechanical issues forum for all Navistar International trucks, including Lonestar, Prostar, Transtar and 9000.
    Discussions:
    2,025
    Messages:
    17,852
    Latest: How similar is DT466 HP Oil system to 6L PSD? Inderjit, Jul 10, 2026 at 1:19 PM

  3. Kenworth Forum

    Ownership, maintenance and mechanical issues forum for all Kenworth truck models, including T660, T700, T800, W800, W900, K100, T2000, C500
    Discussions:
    2,022
    Messages:
    19,090
    Latest: 1980 Kenworth W900A light rebuild thread Oldman83, Jul 9, 2026

  4. Mack Forum

    Ownership, maintenance and mechanical issues forum for all Mack truck models, including Pinnacle, Vision, Titan, Granite, CH, CX, CV
    Discussions:
    328
    Messages:
    2,175
    Latest: Looking at purchasing a 2020 Mack Anthem, any concerns? Magoo1968, May 21, 2026

  5. Peterbilt Forum

    Ownership, maintenance and mechanical issues forum for all Peterbilt models, including 210, 220, 320, 325, 330, 337, 348, 365, 367, 386 Hybrid, 386, 387, 388, 389, 379
    Discussions:
    2,367
    Messages:
    20,733
    Latest: Peterbilt 389 Power Steering building pressure and blowing fluid?? Largecar001, Jun 26, 2026

  6. Volvo Forum

    Ownership, maintenance and mechanical issues forum for all Volvo semi trucks, including VNL 300, VNL430, VNL630, VNL670, VNL730, VNL 780, VHD/VHD430, VNM200, VT880/830, VNL610/660, VNL770, VNL420/300, VNM series
    Discussions:
    3,782
    Messages:
    37,332
    Latest: Volvo 2003 670 D12 meritor zf transmission Burdisco, Jul 12, 2026 at 9:21 PM

  7. Western Star Forum

    Ownership, maintenance and mechanical issues forum for all Western Star truck models, including Lowmax, 4900, 5900, 3406E
    Discussions:
    459
    Messages:
    4,167
    Latest: Western star 98 4900 neway rear end suspension can’t find it 1990pete379_3406B, Jun 21, 2026
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Title Start Date
Replies Views
Last Message ↓
  1. XxdiggitxX

    EGR issues

    XxdiggitxX, Dec 23, 2020
    Replies:
    4
    Views:
    1,723
    XxdiggitxX
    Dec 23, 2020
  2. Road_HAWG

    New Owner Op

    Road_HAWG, Apr 26, 2020
    Replies:
    0
    Views:
    9,796
    Road_HAWG
    Apr 26, 2020
  3. Adriantx

    Truck bouncing

    Adriantx, Apr 16, 2020 ... 2
    Replies:
    10
    Views:
    24,092
    Adriantx
    Apr 16, 2020
  4. Wheep

    Big cam Cummins 4 parts

    Wheep, Sep 6, 2019
    Replies:
    8
    Views:
    2,457
    Wheep
    Sep 6, 2019
  5. Vipercat

    C15 Acert code after service

    Vipercat, Aug 26, 2019
    Replies:
    0
    Views:
    1,373
    Vipercat
    Aug 26, 2019
  6. Yagbt

    Secondary air completely gone.

    Yagbt, Jul 12, 2019 ... 2
    Replies:
    14
    Views:
    4,714
    Yagbt
    Jul 12, 2019
  7. Mandeepsingh

    On command connection

    Mandeepsingh, Apr 2, 2019
    Replies:
    0
    Views:
    10,730
    Mandeepsingh
    Apr 2, 2019
Showing threads 1 to 7 of 7

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