Machinery & Truck Parts30+ Years in the Diesel Business
Machinery & Truck Parts has been serving owner-operators, fleets, and repair shops for more than 30 years. What started as a local salvage and parts operation has grown into a trusted nationwide source for hard-to-find diesel components — but our approach hasn't changed: know the product, test what we sell, and stand behind it.
What We Specialize In
We focus exclusively on the heavy-duty diesel market. Our inventory is built around three things:
- Used diesel truck engines — CAT, Cummins, Detroit Diesel, International, Mack, and more
- Transmissions — manual and automatic units for commercial trucks
- Parts — fuel injectors, cylinder heads, turbochargers, engine blocks, ECMs, and other diesel components
Every part is inspected and tested before it ships, and warranties are included so you can buy with confidence.
How We Handle Every Engine & Part
We're a real, staffed shop in Rockwood, TN — not a drop-shipper. Every engine and part is inspected and tested before it ships, identified by a stock number, and backed by warranty coverage. When you buy from us, you're dealing with the same family-run team that stands behind it.
Our Diesel Expertise
Our diesel expertise spans CAT, Cummins, Detroit Diesel, International/MaxxForce, Mack, Paccar, and Volvo engine families. Explore our in-depth guides for the Cat C7, Cummins ISB 5.9, International DT466E, International VT365, International T444E, International MaxxForce 7, and International MaxxForce DT.
A Top-Rated eBay Seller
We're a Top-Rated eBay seller with over 2,500 positive reviews from buyers across the country. That reputation comes from accurate listings, fair pricing, and fast nationwide shipping — and it's why so many customers come back to us for their next engine or part.
What Our Customers Say
Rated 4.4 stars across 53 Google reviews. Here's what customers say:
"Called for a hard-to-find discontinued fan hub. They went above and beyond to find one and overnight it to us in Gary, Indiana. Great customer service and follow-through."
"These guys really went above and beyond. We had our FL70 down, dealer wanted $13k for a replacement engine. The one we got from MATP was a huge price difference and runs great. Will recommend."
"My experience with these guys was awesome. I went unannounced and arrived at their shop in TN around 9am after a 7-hour drive from NC. Within 35 minutes they had already loaded my C7 Cat engine onto my truck."
"The prices and service were beyond excellent! They stand by their parts and are super knowledgeable. We have never had a problem with the parts we've purchased from them, and turn-around time is always very convenient."
"Outstanding service every time my company does business with them. I've bought multiple parts and engines and had zero issues. They've saved me a ton of cash and time. I highly recommend them for all diesel."
Visit or Call Us
📍 Location:
594 Cardiff Valley Rd
Rockwood, TN 37854
📞 Phone: (800) 696-5459
🕐 Hours: Monday–Friday: 8:00 AM – 5:00 PM ET
Frequently Asked Questions
Do you test your engines and parts before shipping?
Yes. Every engine and part is inspected and tested before it ships, and each is backed by warranty coverage. We're a real, staffed shop in Rockwood, TN — not a drop-shipper.
What warranty is included?
All parts include warranty coverage. Because terms vary by item, call (800) 696-5459 to review the specific warranty for the engine or part you're considering.
Do you ship nationwide, and how is freight priced?
Yes, we ship anywhere in the US. Freight is quoted per destination — provide a delivery ZIP or address for a shipping quote before you order.
How do I confirm an engine or part fits my truck?
Have your truck's year, make, model, and application ready and call our parts team at (800) 696-5459. Reference the stock number shown on the product page so we can confirm the exact unit.
Where are you located and what are your hours?
594 Cardiff Valley Rd, Rockwood, TN 37854. We're open Monday–Friday, 8:00 AM–5:00 PM ET. Phone: (800) 696-5459.