PACCAR transmissions
PACCAR’s TX transmission range includes different highway and vocational configurations. The Pro suffix is meaningful: it can change clutch equipment, application scope, PTO provisions and ratings. Use the full model name with the engine and chassis specification. The following profiles help compare TX-12 and TX-18 families without assuming that a larger gear count or a Pro badge automatically fits every heavier job.
Compare the model families
| Model / family | Application | Overview | Model notes |
|---|---|---|---|
| TX-12 | 12-speed automated manual family | PACCAR’s TX-12 family includes TX-12 and TX-12 Pro, each with 12 forward and two reverse gears. The manufacturer’s comparison lists different clutch specifications, engine compatibility and application limits. Pro is therefore a configuration distinction, not a promise of a higher rating in every category. | Read the profile → |
| TX-18 | 18-speed automated manual family | PACCAR’s TX-18 range includes standard and Pro configurations. The published comparison lists 18 forward gears, with three reverse ratios on TX-18 and six on TX-18 Pro. PACCAR associates the Pro version with off-highway and heavier vocational requirements. | Read the profile → |
Bring the exact specification.
The family name helps organize your search. The build sheet, serial number and relevant manufacturer documentation identify what is installed. Compare like-for-like applications and request evidence for cost or performance claims.
Manufacturer references support the model facts. Our examples and comparisons are editorial interpretation prepared with AI assistance, not road tests or an expert inspection.
Check the year, market and exact build before applying a specification. This guide does not authorize parts fitment, repairs, modifications or loading.
PACCAR manufacturer reference ↗Independent editorial resource. Brand names identify equipment; they do not imply a partnership or endorsement.