Experiencing power loss, gear slipping, or unusual noises under the hood? Learn how Buchanan Diesel helps restore your car's performance through expert engine and transmission replacements.

Engine & Transmission Services in Buchanan, MI
Whether you're driving to work or cruising down the open road, your vehicle's engine and transmission are central to a smooth, reliable ride. At Buchanan Diesel, we provide trusted engine & transmission replacement for autos in Buchanan, MI, offering dependable solutions when repairs are no longer enough.
Engines can suffer from extensive wear, oil leaks, overheating, and internal damage that lead to decreased performance or complete failure. Likewise, a failing transmission might exhibit signs like delayed shifting, burning smells, grinding sounds, or the vehicle slipping out of gear. Ignoring these symptoms could lead to more expensive repairs—or even total breakdown.
Our team carefully diagnoses each issue and offers guidance tailored to your car’s condition. Whether it’s a full engine swap, a transmission replacement, or both, we use quality parts and meticulous installation practices to ensure long-lasting results. Engine misfires, transmission fluid leaks, and hard shifting don’t have to spell the end of your vehicle—there’s a trusted option just around the corner.
What Makes Us Different
We do more than just repairs—we build relationships. When you bring your vehicle to Buchanan Diesel, you’ll notice a level of attention and care that sets us apart. We take the time to understand your needs and your goals for your car, and we make sure you feel heard every step of the way.
Our shop is known for delivering work that’s done right the first time. If something doesn’t meet your expectations, we’ll do everything in our power to make it right. We’ve earned a reputation for quality workmanship, clear communication, and dedication to customer satisfaction.
Beyond mechanical repairs, we’re passionate about vehicle customization. From body fabricating to interior upgrades and underglow installations, we bring automotive dreams to life—so whether you're here for practical repair or performance enhancement, you're in good hands. No matter the project, we deliver a professional, personalized experience that keeps our clients coming back.
Contact Us About Engine & Transmission Replacement Today: Call 269-371-2001!
If you suspect your car needs a full engine or transmission replacement, don’t wait. Delaying service can lead to greater damage and higher costs. Call Buchanan Diesel at 269-371-2001 and let us help you make the best decision for your vehicle.
FAQs
What Areas Do You Serve For Engine & Transmission Replacement?
We’re located at 4635 East River Rd. in Buchanan, MI, just minutes from downtown. We also proudly serve nearby communities including Niles, MI; St. Joseph, MI; South Bend, IN; Benton Harbor, MI; Dowagiac, MI; Three Oaks, MI; Bridgman, MI; Stevensville, MI; Elkhart, IN; Goshen, MI; Bristol, MI; Coloma, MI; Paw Paw, MI, and the surrounding Michiana region.
How Do I Know If My Engine Needs Replacing?
If your engine is consuming too much oil, overheating frequently, or producing knocking sounds, it may be time for a replacement. Other signs include persistent misfiring, a drop in fuel efficiency, and visible metal shavings in the oil. A full diagnostic can determine whether a rebuild or complete replacement is more cost-effective.
How Do I Know if My Engine is Blown?
If you suspect a blown engine, keep an eye out for these signs:
- Blue Exhaust Smoke: Indicates engine oil entering the combustion chamber.
- White Exhaust Smoke: Suggests coolant or water is being burned in the combustion chamber.
- Rattling or Knocking Noises in the Engine: A sign of loose parts like bearings or more severe damage throughout the engine.
Don't let a blown engine bring you down. Our expert mechanics will conduct a thorough diagnosis and recommend the appropriate engine replacement to get you back on the road with confidence.
What Are the Signs of a Failing Transmission?
Common symptoms include delayed or rough shifting, whining or grinding noises, transmission fluid leaks, and dashboard warning lights. If your vehicle suddenly loses acceleration or struggles to stay in gear, your transmission could be on its last leg. Addressing these problems early helps prevent further damage.
Ready to Restore Your Car’s Performance?
If you’re noticing major drivability issues or suspect something’s wrong under the hood, don’t wait. Call Buchanan Diesel at 269-371-2001 and let us take care of your engine & transmission replacement needs with quality you can trust.
Contact us To Schedule Service
Have questions or want to schedule your vehicle in for a repair or service? Get in touch, we're open Monday through Friday from 8:30AM to 5:00PM.
Serving Southwest Michigan & Michiana, including Buchanan, Niles, St. Joseph, Benton Harbor, & Dowagiac, MI, & South Bend, Elkhart, IN & surrounding areas.