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All Trucks›Find My Spec
Find my spec

Find the Number You NeedSix boxes. Pick from the lists and the answer appears below. Nothing to type.

Six questions, then the answer

Each box fills itself from the one before, so you cannot pick a combination that does not exist. The answer appears underneath, already filtered to your truck, with the year range and source on every line.

Who built the truck
Which one
The model year on the door label
Badge on the hood, or check the label
Engine side or chassis side
The specific job
Nothing picked yet. Choose a make in box 1 and the rest will fill in as you go.
TorqueLibrary — A research compilation, not an OEM manual. Green means published and traceable; amber means second-hand, so check it. Where nothing was published the page says so rather than guessing.
Built from OEM operator manuals, federal service bulletins and industry standards (SAE, TMC, Bendix, Michelin, ConMet, Accuride). Confirm every number against the manual for your specific VIN before you turn a wrench.