Truck engines & transmissions · Nationwide
Find Used Commercial Truck Engines & Transmissions
Tell us the truck and the unit. We help identify the exact engine or transmission and search suppliers nationwide.
Engines by manufacturer
Used diesel truck engines
Pick a manufacturer to see how it identifies its engines, what changed between generations and which trucks it's commonly found in.
CumminsX15 · ISX15 · ISM · L9 · ISB 6.7
Detroit DieselDD15 · DD13 · DD16 · Series 60
CaterpillarC15 · C13 · C12 · 3406E
PACCARMX-13 · MX-11
VolvoD13 · D11 · D16
MackMP8 · MP7 · MP10
InternationalDT466 · MaxxForce 13 · MaxxForce 7 · A26
HinoJ08E · J05E
Isuzu4HK1 · 6HK1
Transmissions
Manual, automated manual or automatic
They're different machines. An Eaton Fuller 13-speed, a Detroit DT12 and an Allison automatic each need different matching information.
Other parts
Differentials, turbos, ECMs and more
Down for something other than the engine or transmission? Send the part number and your VIN and we'll search for it the same way.
- Differential / rear end
- Turbocharger
- ECM / engine computer
- Cylinder head
- Fuel injectors / pump
- EGR / DPF / aftertreatment
- Radiator / cooling
- Starter / alternator
- Driveshaft
- PTO
- Axle / hub assembly
Popular engines
Most-requested models
Shop by truck
Start with your truck
Identification help
The numbers that get you the right unit
Model names alone aren't enough. These identifiers let us match the exact build your truck needs.
- Engine serial (ESN)
- On the engine dataplate or label, and often stamped into the block. The single most useful number for matching.
- CPL / arrangement
- Cummins CPL and Caterpillar arrangement numbers pin down the exact parts combination behind a model name.
- Transmission tag
- Riveted to the case. The model string on an Eaton Fuller tag encodes series, torque capacity and speed count.
- Truck VIN
- 17 characters on the door jamb and dash. Lets a dealer or supplier trace what the truck was originally built with.
How it works
From one call to a delivered unit
- 01
Identify
Share the truck VIN and the serial number from the engine dataplate or transmission tag. Not sure where it is? We'll walk you through it.
- 02
Search
We search supplier sources across the U.S. for a unit that matches your model, rating, emissions year and configuration.
- 03
Quote
You get a written quote for a specific unit: what's included, its documented condition, any core requirement and freight.
- 04
Deliver
Once you approve, freight is arranged to your shop, yard or dealer. Inspect on arrival and note any damage on the delivery receipt.
Delivery
Engines and transmissions ship by freight on a skid. Business addresses with a forklift or dock are simplest; residential or liftgate delivery may be possible at extra cost. Freight method and cost are confirmed on your quote. Shipping details
FAQ
Frequently asked questions
What information do you need to quote a used truck engine?
The engine serial number (ESN) from the engine dataplate is the most useful starting point, along with the truck VIN, year, make and model. For Cummins engines the CPL number helps confirm the exact build. Horsepower rating and emissions year help too. If you can't find any of these, call us and we'll walk you through where to look.
Do you sell parts for cars, pickups, marine or farm equipment?
No. We focus on commercial trucks, mainly Class 6–8 highway and vocational trucks: engines, transmissions and major drivetrain and engine parts.
Do you have engines in stock?
We work as a sourcing specialist: once we know the exact configuration you need, we search supplier sources across the U.S. Availability changes daily, so we confirm the specific unit, its condition and what's included on your quote rather than listing stock online.
Can you ship to my shop or yard?
Engines and transmissions usually move by freight carrier on a skid or pallet. Delivery to a commercial address with a forklift or loading dock is simplest; residential and liftgate delivery may be possible at extra cost. Freight options and cost are confirmed on your quote.
Is a used, rebuilt or remanufactured engine right for me?
It depends on budget, downtime and how long you plan to keep the truck. We can explain the trade-offs and quote the options that are available for your engine. Our buyer guide on used vs rebuilt vs reman covers the differences in detail.
Are you affiliated with Cummins, Detroit, Caterpillar or the other manufacturers?
No. Commercial-Engines.com is an independent supplier. Manufacturer and model names are used only to identify the parts you need.
Buyer guides
Know what you're buying
Ready when you are
Tell us what you're running. We'll start the search.
Have your engine serial number, CPL and VIN handy. If you don't, we'll help you find them.