About Us

The driving force of National Truck Parts is a products offered company. National Truck Parts is primarily engaged in the heavy-duty gear business, offering both new and quality rebuilt units as well as O.E.M new and used parts. National Truck Parts company's customer base is many independent heavy duty resale truck parts stores as well as affiliated company stores based in the United States and Canada.

National Truck Parts serves the entire customer market through its Tulsa based facility with a quality staff of knowledgeable people with extensive backgrounds in the heavy-duty market. Our rebuild facilities are first-class back by extensive O.E.M inventories and the expertise to source and facilitate prompt and accurate delivery of hard-to-find parts and units.

National Truck Parts has purchasing power. Whether you require vendor or wholesale. We specialize in hard to find, no longer available parts and units. We also have Fuller 2, 3 & 4-speed auxiliary, 5-speed main to overdrive transmissions, Rockwell drive axle and transmissions. In transfer cases we carry Spicer and Rockwell. We handle Eaton Shuler steer axles and service parts. Also in stock are axle assemblies for steer and drive axles, Clark Planetary, Rockwell Planetary, GKN, Eaton (Dana) and Spicer medium and heavy duty.

We carry in stock many new and used parts for transmissions and differentials. We also carry in stock new, rebuilt, and used transmissions, differentials, transfer cases, axle housings, and other driveline components. We deal heavily with no longer available, obsolete, and no longer produced parts and our resources are nationwide so contact us if you are in search of a hard to find part for your equipment.

• Differentials: single and two-speed, high entry rear and front rear, top loader, New world, tandems, and double reduction tandems.
• Transfer cases: T223, T226, more! Call for availability and specific applications.
• Transmissions: Call for specific applications and availability.

• Transmissions: We maintain a large inventory of older and out-of-production units in addition to brand new vendor units. Follow the link to view the Eaton/Fuller transmission page.
• Differentials: We maintain a large inventory of new, rebuilt, and used units. We also stock many rare and hard-to-find parts for these units. Call for availability and a quote.

• We carry in stock a good selection of Spicer transmissions for various applications.
• We have new, used and rebuilt units, so call for a specific application and quote.
• We also carry Spicer transfer cases. Call for quote and availability.
• We also have in stock Spicer differentials, so call for your specific application.

• We stock Clark differentials and planetary.
• We have International-Harvester differentials and parts.
• We stock many odd and rare, out-of-production and hard-to-find components.
• We have national resources and we are constantly buying and selling surplus and used parts. Check the website or call before you buy.