Restore Performance With Certified Automotive Care
Every vehicle passes through three separate technician inspections before completion.
Receive Work Backed by Thorough Quality Standards
Locally family owned with inspections from multiple certified technicians
AJ Auto has served Oklahoma City as a family-owned shop for 12 years, bringing more than 35 years of automotive experience to every project. Whether you're upgrading a high-performance setup or maintaining an everyday driver, each vehicle moves through a three-technician inspection process designed to catch what others might miss. State certification supports the work, but it's the deliberate review at each stage that keeps standards consistent.
You'll find technicians who understand both the mechanics and the expectations that come with specialized work. From LS swaps to oil changes, the approach remains the same: address what's needed, verify the results, and hand back keys only when the work holds up under scrutiny. That mindset applies whether you're building something custom or keeping a reliable vehicle on the road longer.
AJ Auto takes pride in every job, large or small, handling frame restoration, suspension work, four-wheel drive services, and tuning with the same attention to detail. The goal is straightforward—deliver work that reflects experience, earns confidence, and supports the way you use your vehicle.
Reach out to discuss your vehicle's needs and schedule a consultation with certified technicians who review every detail.
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Engine Swaps
Complete rebuilds matched with modern equivalents for reliability across Japanese and domestic platforms.
Transmission Replacement and Programming
Rebuilt transmissions prepared with gear ratio matching and tested before final installation.
Classic Car Services
Frame restoration and carburetor motors rebuilt with ethanol resistant components for lasting durability.
Compressed Natural Gas Installation & Repair
System installation and repair handled by technicians trained in alternative fuel configurations.
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How Your Vehicle Moves Through Our Process
You want to know what happens once you drop off your keys, and that's a fair expectation. At AJ Auto, the process is built around coordination between technicians and documented checkpoints that track progress from start to finish. Each vehicle receives an initial assessment, a detailed plan, and then moves through stages where different technicians verify the work at critical intervals.
This isn't about adding steps for the sake of it—it's about catching issues early, confirming fitment and function, and making sure nothing leaves until it meets the standard set at the beginning. You're kept informed as milestones are reached, and questions are answered as they come up, not after the fact.
The structure behind the work includes these key elements:
Three separate technicians inspect each vehicle before it's released, ensuring multiple sets of trained eyes review critical systems
Specialized services like transmission programming and carburetor rebuilds are handled with attention to modern equivalents and compatibility
High-performance builds and everyday maintenance both follow the same quality control framework, so nothing is overlooked
Oklahoma City drivers benefit from technicians familiar with local driving conditions and the demands placed on vehicles in varied environments
Get in touch to start the conversation and learn how your vehicle will be handled from arrival to completion.
Our Service Area
A. R.
I was on vacation with my family and got broke down at a parts store, they helped me get my vehicle to their shop, was very thorough and efficient when making repairs to my vehicle. Was willing to help me with my family's needs while we waited and was more than fair on the price of repairs. They were a real blessing to us through the entire experience and came highly recommended by the local parts store. Thank you Aj auto and staff for everything you all did, God bless!
Susan M.
Traveling historic Route 66 in a motorhome w/ a Mercedes-Benz diesel engine, this shop saved us. Saved us on parts , and time. Honest, kind, very knowledgeable. Great business owner, John. Great employee, Matt. Treated us with the utmost of respect and got us back on the road the same day! A shop with integrity in this day and age is a rare gem; we are very grateful we found this one in Oklahoma City!
Shumoeel A.
My ac went out on my way to Arizona, they pushed everything aside and helped, took us in immediately, they got it looked at in couple minutes and ordered the part in blink of an eye. They also worked with us on the price.
I highly recommend you guys to this business. I wish they were in Ohio. Very friendly and helpful
They are a great team
Dennis W.
Tried this shop over three years ago and keep coming back. Owner John and the crew are very customer friendly, and very knowledgeable about new and old vehicles. Pricing is reasonable and better than the dealers, and they are very helpful working with customers to schedule repairs at convenient times.
Brandi M.
This was by far the best experience I have had at any auto shop. My car began to shake and my check engine light was flashing. I called based off the slew of positive reviews. John answered and spoke with me about the issue, told me when to drop it off, and explained the process. His team got to my car earlier than they had anticipated and by the next day at lunch I was picking it up. John and his team members were all ridiculously kind, personable, and thoughtful. They even cleaned my air filter and fixed a light that was dangling without charging me. I will 100% be back and would recommend them in a heartbeat.
Lourory R.
I love going to AJ auto because he is always willing to work with you and he is very trustworthy on the work he does and the price he charges. I have brought many cars to him and he has done wonderful work on all my cars. Aj auto is my main mechanic shop that I always call for advice and take my car to him.
Joseph G.
AJ Auto does exceptional work! I would recommend them to anyone. Got a tank full of bad gas. 10 + gallons. They were able to empty the tank, flush the system, and get me back on the road in a matter of a few days. Thank you gentlemen for your expertise!
Payton J.
Ended up buying a car for my mom through John. What an amazing human! My mom and I were so thankful to have crossed paths with him and the shop. Would recommend 1000x
L-TeeLo
Had my radiator installed and These guys are the real deal. Work was professional and done right. My bill was $195.00 and some change. Mr John Kline really blessed me and the bill was covered and I didn't have to come out of pocket. He told me to pass on the help to others. I highly recommend 💯
Maclayne C.
While on a business trip driving through OKC the driveline fell out of my Tahoe. I called many shops and no one had the time to help except for John and Mathew at AJ mechanic! These men were very professional, time efficient, and their customer service is impeccable. I’ve never had a mechanic shop treat my family so well. There isn’t a more trustworthy shop out there and no one I would rather spend my money with.
A. R.
I was on vacation with my family and got broke down at a parts store, they helped me get my vehicle to their shop, was very thorough and efficient when making repairs to my vehicle. Was willing to help me with my family's needs while we waited and was more than fair on the price of repairs. They were a real blessing to us through the entire experience and came highly recommended by the local parts store. Thank you Aj auto and staff for everything you all did, God bless!
Susan M.
Traveling historic Route 66 in a motorhome w/ a Mercedes-Benz diesel engine, this shop saved us. Saved us on parts , and time. Honest, kind, very knowledgeable. Great business owner, John. Great employee, Matt. Treated us with the utmost of respect and got us back on the road the same day! A shop with integrity in this day and age is a rare gem; we are very grateful we found this one in Oklahoma City!
Featured Resources
Accountability Rooted in Local Ownership
AJ Auto operates as a locally family-owned business, which means the reputation attached to the work isn't corporate—it's personal. Technicians who've spent decades in the automotive field bring that background to every repair, rebuild, and retrofit, and they stand behind what they deliver because their names are attached to it.
Experience shapes how problems are diagnosed, how solutions are selected, and how long-term performance is prioritized over quick fixes. State certification provides a baseline, but it's the cumulative knowledge from years of working on everything from classic restorations to compressed natural gas installations that informs the decisions made under the hood. Dependability comes from that depth, not just from following a checklist.
Connect with the team to discuss your project and receive straightforward answers from technicians who've built their careers on reliable workmanship.
