"Offering a huge inventory Heavy duty used truck parts, transmissions, engines, rear ends, and cabs,used semi parts. We buy old and salvage trucks Whether you are in need of a truck engine or a specific truck part, the professionals at Tri-Parts can help. Check out the large selection of medium- and heavy-duty transmissions at TriParts. We have transmissions for all makes and models. Turn to us for completely tested engines for your trucks. We have engines from manufacturers like Perkins, Detroit, Mack, and more.. We have over 10 years of experience so you can expect us to deliver excellent service. You can turn to us for cutoffs, transmissions, cabs, and hoods. We also provide polishing services."