Jim and the rest of the guys did a great job getting me back on the road! Very knowledgeable and affordable. Hard to find an honest mechanic around anymore. I've referred friends to these guys and its always been great. I thought it was going to cost me a fortune but they were very affordable. I don't know a thing about transmissions (or rather cars as well), but they explained it all pretty clearly. Thank you! read more

I'm mostly satisfied with my visit. The mechanics were attentive and fixed the car as promised. There was a small delay, but the final result was good. read more

Had a Transmission rebuilt for a ram 2500 diesel and we were strongly convinced from them that we need a rebuild with billet parts. So we did but unfortunately there warranty was only a year and take a guess. A few weeks right after the warranty the tranny grenades itself. They cant do anything to help except charge us another 12-13k for another junk rebuild. Anyway don't do transmissions here and definitely find a longer warranty. This was a company vehicle and we wanted to have a relationship with a mechanic for our fleet but when I called back the immediate no help, and made it seem like I was lying when they told me they need to see it. It was at AAMCO they showed me the damage so I wasn't lying read more

I called to get the fuel filter replaced on my Denali. Jim got me in and out on that same day. The staff is very good and attentive as if they were working on their own vehicle. well done! read more

Absolutely top notch service and QUALITY! I am so impressed and would never recommend otherwise!

Amazing service, fast repair and excellent diagnostic skills. My car was misdiagnosed for a transmission replacement costing over $6k, "Mondo" was able to diagnose the real problem within an hour and fix it for a fraction of the price, the same day. Excellent shop, built on great service, honesty and integrity. read more

Thank you, Roadrunner, for taking care of my car! I recommend this company highly. I had issues with my car that the dealership could not fix. I called Roadrunner asking for their help and Taden was so wonderful. He was able to fit me in the shop's schedule and they rebuilt my transmission. I am very happy with the service provided. read more

Let me say something, Jim and his team did an excellent job with my truck! My transmission in my 2003 Sierra 3500 Turbo Diesel dropped! This place was highly recommended by a few friends. I'm so happy for choosing them! Jim was very upfront with the possible costs of the rebuilt. After getting my extended warranty to pay the maximum amount, I paid the difference. Even though I have to pay over 50%, I'm highly satisfied with the amazing job they did. They definitely treated me like family and I was comfortable with them! They promised 3 days and delivered! He showed me my gears and my torque converter. I was very confident that my truck was in good hands! Like I said, they delivered above and beyond! You can definitely tell that Jim and his team are experts in rebuilding transmissions. I'm also surprised he had the time to focus on my truck, he's really booked. I can see why, his team does amazing work! I would highly recommend them to anyone who needs any type of transmission work! They are highly skilled and knowledgeable in what they do! Thank you Jim and you're amazing crew for getting my truck back on the road! You won't be disappointed with their work! read more

Roadrunner Transmission and Diesel - Auto Repair Near Me - Centennial, Colorado

Roadrunner Transmission is the only shop to call if you're looking for honesty, integrity and superb customer service. I brought my car in thinking it was either going to be a new transmission or catalytic converter-neither were in my budget! They diagnosed that it was the turbos. Still a pricey replacement. Parts were ordered but when they got in there to start the disassembly they found that a clamp had failed. Reattached the turbos and called to give me the good news! The parts were returned to the warehouse! I highly recommend this shop! Randy and Charley are the best, give them the opportunity to do you right! You won't be disappointed either. read more

I had to have my transmission repaired at 138,000 miles. Not a good situation, not good timing, nothing was good about the breakdown. I got a diagnosis and an estimate from Roadrunner based on their initial observation. After approving a repair, they called to say the repair was major, and it would exceed the estimate after tax and everything. They said they would limit my cost to the upper amount of the original estimate, which, although it wasn't what I wanted to pay, it was a fair amount and it was what I would do for a customer of mine if I gave them a cost estimate. I would recommend this company and I would use their services again if faced with the same situation. read more

I didn't need the diagnostics, etc. Someone like me that I am on a fixed income just needs the basics. Valvoline charged me $145. Maybe spending more helps other people, but it would not have helped me. I'm just going to give this a 4 star, because I already reviewed it and it won't let me respond. It's making me do another review. read more

Roadrunner squeezed us into their schedule and quickly replaced our damaged clutch. All work and dealings were very professional. Price was fair for the work performed. read more

Jim and his crew were great! I found them while helping my husband locate a shop and I'm glad I did! The work was fast but great, everyone was nice, knowledgeable, and clear communication! We will definitely use them again if we ever have any future need! I felt the pricing was fair and Jim didn't seem like the type of guy to feed you a bunch of BS, very straightforward the entire process! And my husband won't just let anyone work on his Suburban but he thinks a lot of Jim and Jesus, and thinks they did great work! read more

They deserve 10 stars. Had a plow truck go down or blown transmission. They rebuilt the transmission, beefed it up for a plow truck and got it back to me within 24 hours! Amazing! Thanks so much ready for next storm:) read more

I have had 3 vehicles serviced with Jim & Randy at Roadrunner. 2 of those services were complete transmission rebuilds. I know enough about vehicle service to drive Jim & Randy a little crazy but found them to be very direct, honest and ethical. For the transmission rebulds, I had done some homework to investigate issues and improvements over the stock factory transmissions for these vehicles. When I initially talked to Jim, I asked him what improvements could be made to the transmissions and he hit every major design flaw and what he does on his rebuilds to improve the performance. I knew right then and there Roadrunner was the place for me. Any issues I have had with the work was discussed and adressed to my satisfaction. They are professionals who truly care about thier customers and doing good work. I stopped by unannounced to check in on the repairs and Jim would take me in the shop to show me what was going on. I cant think of a better way to communicate the status of the repair and exactly whats going on than to see it with my own two eyes. Thier communication was outstanding. I do a lot of repairs on my own and will only use Roadrunner for the repairs I cant do or dont have time for. I would recomend Roadrunner to any family or friends for work on thier vehicles. read more

This shop is awesome. They checked my pilot transmission and let me know it is fine. Honda dealer tried to fool me for thousands of dollars.

Life saver! Jim is fantastic! The transmission went out on my BMW 325 CI. It's NEVER a good time for that to happen but this was close to the worst! My stepfather just got home from nursing home and I was already pretty freaked out. Then tranny went out took it to Europe repair place down the street they wanted $5,000 to rebuild it and then when it got to Roadrunner's found out motor mount got cracked while it was at other shop! Not only did Jim repair it in 2 days he also beat their price by $1700! Then he fixed the motor mount, and changed the oil still came in $1300 less than than rebuild at euro place, Plus he gave me and my dog a ride all the way to Aurora! Have given his number to several other women I know with car problems. Also posted it ( something I've never felt compelled to do before) on the " card board" at coffee shop by my house. It's great to have a place to take car where the first worry isn't wether you'll be able to pay for anything else for next couple months! THANKS AGAIN JIM!! read more

Jim and Herby at Roadrunner took great care of me. I drive a 1999 F250 with a 7.3 powerstroke. It's getting harder and harder to find honest and reliable mechanics to work on my older vehicles. Luckily, I brought my truck to these guys and couldn't be happier with the work they did and the way they treated me as a customer. The repairs were great but the service was even better. Highly recommend. read more

Jim and his team were very honest in helping me with my Nissan Titan xd. this review is not because they fixed the truck - unfortunately they could not. BUT this review is because Jim took the time to keep me posted on every step of their evaluation and work they were doing. When they were unable to fix the truck, he only charged me for the materials he purchased and waived all labor. He took the work seriously and you could tell is was very important to him to do the right thing! read more

Jim is Honest. Yes, he also does work. About a year ago he built me a Heavy duty transmission, did a good job so I had him do other work including: bigger turbo, intercooler, trans cooler, head studs, 4k governor spring kit, intake and exhaust manifolds, trans lock up kit, exhaust brake, 4 inch exhaust, CTS2 system with all the sensors, and more. I've since then pulled my trailer thousand of miles from Cali to Havasu, back and forth into Mexico and all around different riding spots in socal. Everything works well and the transmission is a champ, it never even thinks about getting hot. read more

Jim was great! He was able to get the jeep in right away and did repairs in a couple of days that a previous shop couldn't figure out in over 3 weeks. Jim is very knowledgeable and very fair in his pricing. I highly recommend Roadrunner for you car repair needs. read more

Do you like spending your hard earned money on car repairs? Me neither! That's why I liked this place. I got quotes from many different places for a transmission flush on our Nissan Rogue. Jim was one of the few who I talked to who sounded like he knew what he was talking about. He was only changing the fluid, not flushing it, as you cannot flush our model of vehicle. He charged $150, whereas all the other quotes came in at $175-$210. He was also very honest with me when I asked about the life of our vehicle and what to expect in the future, which helps me to plan ahead. I really appreciated his straightforward approach to business, and I am sure you will, too. Jim got our car in pretty quickly, and had the vehicle ready in a short amount of time. The location is tucked back from the road, so I had a hard time finding it the first time. I would suggest a better map or directions, since their name is not on the sign by the road. read more

Jim, Randy, and the Roadrunner Team are the best! We called them for an estimate to replace our transmission, and they got us in on the same day. Before the end of the week, they had us up and running again!! The week after we got our Jeep back, the heater quit working. It was on one of the snowiest days that we have had this year, and I was stuck without a heater. I called Randy, and without hesitation, he said to come right over. Jim jumped in to look at the heater, found the problem, and he and Randy started making calls to locate the part. The part had to be ordered, but I needed my truck and a heater. Jim was able to get it working with a short-term fix until the part arrived. Totally saved my day!! Thanks, Jim & Randy, you guys are great!! read more

Randy and jim are great they gave me a honest price better than most with a atra warranty. I will bring my vehicle here for everything. A great place to work with. Fast and know it is done right read more

We had our transmission rebuilt here most recently and they did an excellent job. They stand behind their work! The owner, Jim is very professional and friendly, along with the staff. They started work on the car on Monday and were done by Friday the same week, and the price was reasonable and the quality of work was excellent. Now the car runs great! I would highly recommend Roadrunner Transmission for any transmission repairs. read more

I've now brought 4 of my cars in to roadrunner and the experience is always the same. Jim is always fair and honest and gets the job done. It's becoming harder and harder to trust a mechanic will do "the right thing" these days, but I have total confidence bringing my cars into Roadrunner. If you are looking for someone to work on diesel, or transmissions, Roadrunner is the place to go! read more

Jim really knows his stuff when it comes to Diesel trucks. He found some serious issues with my Duramax before a big trip to Grand Junction towing a huge trailer. We were grateful and felt confident getting to our destination without incident. On the way back we stopped at the top of Vail pass and the truck wouldn't start! In desperation I called Jim and he said it sounded bad but try to bleed the fuel system and maybe it will work but he didn't think it would. Luckily it did and we brought it to him to repair a place where air was getting into the fuel system. He is knowledgeable and fair on pricing. read more

They are honest and hard working. Great communicators as well.. called and texted to get a hold of me or ask questions. Stayed on top of my issues and made sure it was running great when it was all done and over. Even came in on a Saturday to meet the tow truck, ordered the part that day and fixed it Sunday morning. I can recommend this place 110% Thanks Jim!! read more

I was happy to have the competent folks here look over my diesel rig. We had a thorough check of the used vehicle done before I took it on a cross country trip. The expectations were well set and communication was not rushed like so many other places, they were happy to chat and field my questions. read more

Roadrunner extracted and replaced a broken exhaust manifold bolt and did some work on my transmission. Happy with their service.

Awesome job! Jim is a cool guy and will give you an honest deal and will do honest work. Stop by roadrunner for all of your transmission needs and tell your friends this is the best place to go! read more

I've experienced many mechanics over the years and Jim and his team here are the best! Incredibly honest and helpful. Jim has a rich understanding of transmissions and the automotive industry as a whole. I am so grateful for Eddie and Jim over at Roadrunners! I'm bringing all my transmission work here. read more

Jim was very imformative! He gave me the best price in town on my Tranny job. He does jobs for the company I work for ....Enuff said! I highly recommenced Roadrunner Tranmission! read more

Randy, was polite, fare and informative. My auto was fixed on time and the price charged was fare. I would not hesitate to use Roadrunner again. read more

Thank you Randy for your help with my transmission, I truly appreciate your honesty.

Randy is a liar. I recently had my car towed to Roadrunner since my car would not drive more than 20 feet. Before I had the car towed there Randy said it would be $120 for an hour to diagnose the issue and he would waive it if I chose to have it repaired. I told him to go ahead and do the diagnosis. He calls me back 3 hours later and says that the bill is $3600 to have the transmission rebuilt. I told him it was too much and said how much do I owe you if I don't do the repair. He said $1800 and I would have to have the car towed. If he had it for 3 hours 120 an hour it should not be 1800 to get it back. Do NOT go to this shop. read more

Dude knows his stuff,Jim and his staff are very proficient. Recommended 3 other friends that all have had a great experience with roadrunner. read more

Jim rebuilt my transmission in one day! He is an awesome and fair guy! My car had a stored code of the transmission slip. Jim was able to get my car in ASAP. read more

Honest, Timely responses, cost effective repair. Thanks

Commercial Account - This company rebuilt my transmission on a 1993 F250 We don't really use the vehicle very much because it is a yard truck, 9 months ago I had it rebuilt by James. The vehicle only have 2000 miles on it and now the transmission is slipping again. I have this verified with another shop and I just don't trust this guy can fix the transmission right. I don't have time to waste with back and fourth with returning the vehicle until they get it right. My loss, I am going to reinvest in a company that can get the transmission fixed the first time, I understand that this is a simple build for an experience builder. I was sold a bill of goods - Bravo sir read more