1. Sub-Forums

   Commercial Truck Forums

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

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   1. Freightliner Forum

   2. International Forum

   3. Kenworth Forum

   4. Mack Forum

   5. Peterbilt Forum

   6. Volvo Forum

   7. Western Star Forum

   Latest: Saved From Scrap AModelCat, Mar 7, 2026 at 6:59 PM

2. Sub-Forums

   Heavy Duty Diesel Truck Mechanics Forum

   For mechanics and owners of shops servicing semi trucks and Class 7-8 vehicles. Repairs, troubleshooting and business advice.

   Discussions:

   9,706

   Messages:

   94,841

   Latest: Re gear 3.42 to 3.90 or 4.11? W923, Mar 9, 2026 at 9:49 PM

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