Check-Engine Diagnostics
We read the codes and diagnose the real cause, so you fix the actual problem instead of replacing parts by guesswork.
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Open 8:00 am until 5:30 pm today
Downtown Cleveland engine and transmission repair
When your check-engine light comes on or your car starts shifting rough, the hardest part is knowing who to trust. Engine and transmission work is where drivers worry most about being oversold, and that is exactly where our downtown shop has built its reputation. We start every job with a real diagnosis, explain what we find in plain language, and tell you honestly whether it is a minor fix or a major repair. Our shop sits in the bottom of the Hamilton Garage at Hamilton and East 12th, close to work and easy to reach.
Our ASE-certified team handles the full range of engine and transmission service, from diagnostics and fluid work to major repairs, and we back qualifying new parts with our Fixed for Life warranty. Drivers regularly come to us for a second opinion and leave relieved, because we would rather earn a customer for life than sell a repair you do not need. If you are weighing a big estimate from another shop, bring it in.
What we do
Everything your engine and transmission need under one roof at the base of the Hamilton Garage, from a check-engine diagnosis to major engine repair and transmission repair, handled while you work downtown.
We read the codes and diagnose the real cause, so you fix the actual problem instead of replacing parts by guesswork.
Schedule online →From misfires and leaks to major work, we diagnose and repair engine problems and give you honest options first.
Schedule online →Fluid changes, leak repair and diagnostics to keep your transmission shifting smoothly and avoid a costly rebuild.
Schedule online →Slipping, hard shifting or no reverse? We diagnose the cause and repair or replace, with qualifying new parts covered for life.
Schedule online →Facing a big estimate elsewhere? We will take an honest look and tell you what the job really needs, no pressure.
Schedule online →Engine and transmission fluid service on schedule is the cheapest way to prevent expensive breakdowns down the road.
Schedule online →What Cleveland drivers say
Called Rad Air to inspect my Jeep's transmission due to months of intermittent shifting issues. Over the phone, Paul gave me a simple procedure to reset my transfer case control module, which instantly fixed the issue. He could have easily charged a couple hundred dollars for an inspection fee for what was ultimately a 2 minute fix. Needless to say I'm a Rad Air customer now!
Wonderful service. I took my car to Rad Air after having major transmission issues, and they also scanned for other issues that other places missed. I ultimately did not go with the service and got rid of the car, and they were very understanding. Paul at the front was amazing. He did not charge me for the scan after I decided not to do the service and even gave me helpful suggestions. Very happy with my experience!
I was having issues with my engine after entering downtown Cleveland. A coworker mentioned Rad Air, so I dropped it off. Within a few hours they provided a detailed update: the engine would need to be replaced. Not wanting to spend the money and wanting a second opinion, they made my car ready to drive home. I took it to my trusted mechanic, who diagnosed the exact same issues, and the estimate was almost dollar for dollar. Thank you Rad Air for the service and honesty.
I am happy to report that for the first time I was not wondering if I was treated fairly. I took my 2023 Kia Sportage in because the engine light came on. When I got the repair code from Rad Air, I ran it through AI to see what it should cost. Rad Air was right on the money. Paul, the manager, gave me additional advice about keeping the expense down. I will be back should other issues arise.
Paul is absolutely amazing. Very responsive to any concerns and great about setting timely appointments. He explains repairs clearly, especially for someone like me who doesn't know a lot about cars, and he is honest about critical repair needs versus repairs that can wait.
Fast service and transparent pricing. Definitely going to be heading back there next time my car needs work!
Paul and team were amazing! Excellent customer service and professional work. I highly recommend them!
Reliable, friendly and honest! I tried other shops in the area before coming to Rad Air and I wish I had just started here first. I will keep coming back!
These guys have integrity. They let you know exactly what you need and don't try to upcharge unnecessarily. Would highly recommend.
They always get work done in a timely manner. Prices are reasonable as well. The manager is very helpful and makes the entire process very easy. Highly recommend coming here!
From the time I dropped my car off I felt I was in good hands. When it was explained what was needed and why, I was confident in what I was told. I have no complaints and will return if another concern arises.
Paul and his team have always been professional, prompt and transparent. The location and convenience cannot be beat, and they have always treated me right, never pushing for unnecessary add-ons or repairs like some shops do.
Meet your shop manager
Regulars ask for Paul by name, and you'll spot him again and again in our Google reviews. He and the ASE-certified team handle everything from a check-engine diagnosis to major engine and transmission repair, with straight answers, upfront pricing and no upsell. Stop by the Hamilton Garage and he'll get you taken care of.
Schedule with Paul's teamFind us
We're in the bottom of the Hamilton Garage at the corner of Hamilton and East 12th, with free loaner vehicles and shuttle rides so you're never stranded downtown.
Who we serve
From the Downtown, Ohio City and Tremont core out to Lakewood (44107), Cleveland Heights (44118) and East Cleveland, if you live, work or park anywhere in Cuyahoga County, an honest diagnosis is only minutes away.
Good to know
Every repair carries our 36-month/36,000-mile parts & labor guarantee, whichever comes first, and qualifying new parts are covered for as long as you own your vehicle. See what's covered →