They were able to determine the issue and fix it with minimal problems. Will be returning.

Can't say enough about Leon's. I took my 2005 Highlander there when the transmission kept slipping and then re-engaging. Leon's was recommended by the highly-trusted owner at Irvine Auto. When Brent heard the description his first thought was probably a computer problem, not a transmission issue. He was right! He not only diagnosed it correctly, he worked with Toyota to get an OEM computer. Toyota allocates these sparingly (to keep 3rd parties from price-gouging) and he actually had to write them to obtain one. He installed it and did a full transmission service - all at a great price I got the car back and its as good as new! Thanks to Terri for organizing and scheduling everything and Brent for his expert analysis and work. read more

My clutch hit the floorboard, and I asked 2 transmissions shops for quotes. The "other guys" said $200 for inspection. Leon's Bret wrote back, recommending me to first check clutch fluid levels. He was right! You/we know exactly which shop would get my business in the future. read more

To begin my review I was recommended to Leons Transmission by a longtime friend/mechanic of mine. I had a Valve body issue on my car and needed the Valve body replaced. The job seemingly went well but upon recieving my vehicle back within 10 miles smoke came pouring out the hood and I had to immedietly pull over and shut the car off. With all of this happening on a weekend I had no choice but to tow the car into the dealership. The dealership shows me that the transmission dip stick delete ports valve was left wide open thus allowing transmission fluid to pour out. Aswell as a rounded out transmission overfill plug. This costed me anothher $600 on top of the $3000 I initially paid. If I didnt catch it sooner repairs add up to roughly $10,000. Once I confronted Brent with the information he was apologetic and tried to right his wrongs offering to send the bill to corporate to reimburse me for the dealerships work. Since then Ive tried numerous times to get ahold of Ken Rusol to discuss this situation further as I feel paying $1000 for negligent labor that led to failure of my vehicle and loss of wages from missing work is absurd. ( You dont send under cooked food back at a restaurant and still pay for the entire meal. ) I have left voicemails and continued to call Ken. It has been weeks now and they have just sent the check for the $600 and refuse to speak to me whatsoever. Brent is a nice guy. When it comes to corporate they seem to lack any knowledge on how to treat a customer and think ghosting is the correct solution. So now I have to resort to reviews just to seemigly get any response out of these guys. Please avoid this company!!! read more

If your looking for a transmission shop that cares about their customers, you found it! Thanks again Leon's Costa Mesa!

Great service, communication and follow up. Very happy. Brent was great to work with he really knows his stuff.

Great service. They know what they're doing. Diagnosed and communicated the problem, then recommended options.

Very timely and informative! Really appreciated their help, advice, and service. They were clear about the diagnosis of the issue and also what might occur in the future. read more

I took my car to Leons after still experiencing symptoms after I asked the mechanic I normally use, who is very popular and always busy in the CDM area, stated that the fluid level is good and not too dirty. It turned out that the level was 1 1/2 qts low and old. A very fairly priced basic service solved the problem. Leons also showed me other engine problems that need to be addressed soon! Unfortunately, they just work on transmissions. If you are experiencing any problems with your transmission, I highly recommend you go to Leons. They are honest and fairly priced. read more

They kept my car for way longer than they were suppose to because people " were out" . When i got my car back , my outlet to plug in my phone to carplay was completely broken so i couldn't use my phone on my screen anymore. They didn't properly finish the job by securing in the ENTIRE underneath part of my car so i was driving on the freeway and i could hear loud loud dragging with sparks flying up! The last thing they did was return my car to me with a very loud and obnoxious squeaking noise when I even press the break at all, but especially when I brake. I DO NOT RECOMMEND THIS PLACE!!!! read more

Honest feedback on my VW Atlas engine mount work. Troubleshooted the grinding noise correctly.

My car has been acting up and someone recommended me to come to this shop. Over the last two weeks i have stopped by twice and called one time but i guess the person im supposed to speak with is not available. Why is no one there! The shop is small and i dont see many workers there but why is there no front desk person to answer the phones and or answer questions, this is ridiculous. I wont be taking it here anymore, ill be going somewhere else. read more

Great team and fast turnaround . Brent was awesome to work with and knew exactly what needed to be fixed on my Ram 1500 ecodiesel . read more

This morning I stopped by to check the transmission in my '84 Monte Carlo SS. Brent helped me right away and lifted the car up. I found out that my mechanic had been dishonest and told me it was a TH250 to get more business. I had been feeling confused for a couple of weeks because I thought I had bought a matching number car, and I had sent a 200-4r to get rebuilt to put on. Something didn't feel right. Well, I found out that I do have a TH350c and that I wasted money. Thank you, Brent, for taking the time and giving me peace of mind. read more

Got recommended here and my car was taken in day of and was fixed same day! Fair prices too!

Came in a little over a week ago with a transmission code for the transmission range switch circuit A. Guy there said it was the computer inside the transmission and fixing it would need rebuilding the transmission. I took it to a place down the road Costa Mesa Transmission and replaced the switch and fixed a wire that was shorted to the switch and fixed the code and fixed the problems I was having with my vehicles performance. I bet if I had a nicer vehicle or something that screamed I'm willing to shell out a couple grand they probably had been more willing to do their job. read more

Actually took my clutch in thinking it needed replacing. They tested it and said it was good for now; no need to replace. Gotta love that kind of honesty. I'll be back. read more

Horrendous customer service. Called in get an estimate gave them my make and model. Appointment was set. I arrived at the appointment and they stated they had to order my part. And to reschedule next week. Later, an older gentleman came out and told me they have no clue how to get my park and told me to go back to the dealer. This place is a joke. Don't trust your high end vehicles at this chop shop. EDIT: beware of this business as they will dox you and put your private information online for everyone to see. I had to remove my previous review. Cyber bullying is unacceptable. read more

We are new fans! My husband's car had some transmission sounds and when we took it to the Lexus dealer it was $8600 and needed to be replaced. Brett at Leon's said the sound was something to be worked with and that the transmission still had a lot of miles left it. It was a $200 fix. These guys are super ethical and I can't say enough good stuff about them. Thank you so much there is a business out there that is honorable in this arena. No wonder they have five stars on yelp! read more

Brent was very informative and conscious of the cost of the repair. He couldn't confirm what I thought the issue was and gave me an option to do the repair and hope that clears the issue or wait until it's obvious so to not do additional repairs. Considering it'd be over 1k, I took the wait and see option. It's very drivable and the downside of waiting is very low. Not everyone can throw down 1k and say here's some more for the next repair. I appreciate you looking out. I'll come back later. Thanks again. read more

Took my X5 in for a fluid dump and new filter. Reasonably priced and finished it in just an hour and a half. I'll be back!

My 2017 Explorer transmission suddenly went south when my wife was driving it. On my way to rescue her, I called Brent. He entertained all my questions and what-ifs, so I knew what to check once I got there. As suspected, I determined it was a transmission problem, so I had it towed to Leon's. The problem ended up being an electrical connection, but it was very difficult to track down, but he got it done. Whereas the dealership would have insisted on replacing the entire wiring harness for thousands of dollars, Brent wired up a bypass that works great, and looks like a factory connection, but for alot less $. Thanks Brent. read more

These guys know their stuff and charge fair market value prices for quality work carried out with attention to detail.

Helped diagnose issues with our car and did so on his own time and gave us the recommendation to go to a mechanic. Would highly recommend this shop if you are experiencing any transmission issues. read more

Nice people Fair prices Got the job done fast Excellent customer service. Kept you up to date on the issue, how long it would take and when it would be done. Unfortunately there was a part mishap, but he covered the charged and replaced and runs great. Thanks Brent! read more

Transmission fluid service was good; however, for some reason the owner/manager would not honor Yelp!'s check-in offer of $25 off any service over $100 (my invoice was $206). Owner/manager pled ignorance regarding the check-in discount, even after being shown the legitimacy of the voucher. Happy with better shifting car; not happy with not receiving legitimate discount - however small it was. Will not return with my business. read more

First of all, let me say that I am happy with the completed automatic transmission rebuild on my 1979 VW Bus. However there were several complications that lead from their initial estimate of a week, into it taking a month to rebuild. The transmission was rebuilt and then had issues shifting (as per my mechanic, who partners with this shop), this process was repeated two times. Again, I understand old vehicles can be finicky. But the reason for the two star review is that the shop managed to mangle my roof rack by raising it into the ceiling of the shop with their lift. Upon discovery of this (no one mentioned to me and I had to find it myself while I was driving it home), I returned to the shop and they said they would take care of it. Two days later they had bent the rack back into shape and I returned it pick it up. I do sincerely appreciate the work they've done and that they took ownership of their mistake with my roof rack. But that rack had never been damaged prior to taking it into the shop and I do have reservations about its structural integrity now that it has been bent so far out of shape and then bent back. read more

Was not able to do the repair on my car...due to the type, but were happy to give me a quick referral.

I've had two transmissions rebuilt by the Costa Mesa shop and fluid changes on these and on another vehicle. I was happy with the general service, and the service manager, Brent, seems to be honest. The first transmission, a T400 in an older Suburban, is fine, though it still has very low mileage on the rebuild. The second transmission, a Ford 4R100 in an F350 7.3 diesel, was a complete disappointment. It was ok for 25,000 miles, then reverse went out. It had a 2year/ 24,000 mile warrantee. Due to Covid, I hadn't been driving the truck much, so the 2 years had past. That, plus a thousand miles past warrantee equaled no help from Leon's. Not even an offer. I'm putting another transmission in the truck from a builder who specializes in this transmission. It's expensive, but I wasted $3,000 at Leon's. That was expensive, too. If you use a vehicle for towing, or other heavy duty use, I wouldn't waste the time or money at Leon's. Go somewhere that will do the necessary upgrades that, even though I asked about them, Leon's wouldn't do. I'll add that the original transmission in the truck was working fine, but it had almost 200,000 miles on it. I had it overhauled so it would be reliable. read more

Needed Pontiac AWD repaired - Going for 300k miles !! Very through service. Brent is trustworthy and forthright. The cars running better than when I bought it. Thanks Leon's read more

I took my truck in to another transmission place they wanted to replace my transmission for $3800.00 hundred dollars, so a friend recommended Leon Transmission Garden Grove, Rick told me all I needed was a $.10 fuse Wow my transmission works like a dream Thank You Rick Leon Transmission Garden for saving me so much money. And Thank you for being honest Wally D read more

Brent is very detailed and patient. He worked on my car for a few hours and in the end he couldn't fix the problem so he didn't charge me anything! I like the honesty. read more

Brent was super helpful and assisted me with making sure I did the right think with my transmission fluid! Saved me a lot of money and repairs. I appreciate his help and would recommend taking your car here! read more

i sent out a yelp request for someone to take a look at my transmission. Brent was professional, kind advised of the need to inspect due to a sealed transmission. He recommended to have fluid added if needed . have a fair price for the service. As he proceeded to inspect it was determined that a fluid change out would not suffice and transmission would need a rebuild. Brent was honest and open the entire time about what the process would be and what i could expect. he offered me a quote on the transmission which seemed fair as i've had to have a transition. replaced before. At this time i do not have the funds ti have the car fixed so i had to deny the service. Brent was great the whole time and if i do end up getting the transmission fixed i will be coming back here even though it's a bit out of the way from me. if you are having transitions issue give these guys a call. read more

One of the best and most honest repair shops. I called and Bret offered solutions to my false neutral problem . Rather than trying to sell me a transmission he thoroughly researched our cars manufactures history. He found that they didn't replace any computer parts on the West Coast. This narrowed it down to the only problem the solenoid. Thank you Bret and Leon's transmission for your hard work and honesty. read more

They did a great job on my transmission for a really good price, even getting it done early for me. Highly recommended.

Super honest! Top Notch customer service! And fantastic work don't go anywhere else! These guys really know their stuff! read more

Bret was awesome, highly recommend Leon's! Very easy to work worth, communicative, which, fair pricing.

Called to ask about a transmission oil and filter change. The man on the phone was honest and showed great attention to detail. He took time to answer all my questions and gave me a great referral for the coolant maintenance that needed to be done at another location. Would absolutely recommend Leon's transmission services to anyone who needs it. read more

DO NOT Bring your car here!!!! Brent Sephel WILL rip you off.. I brought my car in because it wouldn't go past 40mph I would step on the pedal and car would not go. Basically it wasn't passing any fuel. I took it to Brent he told me I needed a new transmission. I trusted him. A week later after the new transmission was installed my car kept doing the same thing. I took it to another mechanic and he said all it needed was some new air filters and the Mass Air Flow Cleaned out. I called Brent to talk to him about what happened and his words were "Fxuck OFF! And hangs up on me like a STRAIGHT B!TCH That he is! And goes and Cries to LEONS corporate offices in Garden Grove and The Owners their said Brent was one of their best guys! Speaks volumes of this Business! Your logo should be "Ripping People Off for 60 years!" Leon's Transmission is a joke and out to rip you off, Don't let Crooked Brent or Leon's Transmission Rip you off! read more