H & M Transmission & Automotive - Castle Rock, Colorado

Abhay Mehta

We had the best experience of getting transmission rebuilt at this place. Paul Harris is the best transmission mind and a thoroughly knowledgeable and experienced mechanic in the business. Greg was very helpful and courteous in answering all our questions and providing assistance through out the process. This company is a breath of fresh air. Keep up the good work!

Ben W

When my first Powerstroke broke down a family friend Recommend H&M.
This being my first diesel truck I really had nobody that I already knew.
I read through the reviews before taking it and noticed the had some negative. The majority were a couple years back. As an electrical contractor I have worked for companies that have had bad reviews and how it’s to come back from. So I decided to give them a chance.

Upon diagnostic, they had discovered the high pressure oil pump had imploded and shot metal fragments through line.
Several parts, including the high pressure oil pump had to be replaced.
Truck set in their shop from late October early November to January when I was finally able to pick it up.

This is not being my daily driver it took a road trip with my father to New Mexico to discover back that the upper radiator hose connection had been broken and JB weld it.
Prior to my service at H&M this was I had not seen this where it was located.
This is not being my daily driver I notify them move forward, trying to give the benefit of the doubt again.
I notify them of what I discovered and did not make a big deal about it.

Fast forward eight months I am driving up Mount Evans and my truck dies when I let off the fuel pedal.
Assuming the high pressure oil pump was good since a 8 months prior.
My father and I attempted to replace the fuel injectors, dummy plugs and stand pipes.
Still after all this week had trouble starting the few times we were able to get it It substantially better.
After three months of fighting with it take it another shop that was recommended to me.
Mainly because my recent moved to the mountains made H&M how much more expensive tow.

At the shop in Golden after a couple of weeks, they notified me that they had discovered the air leak.
It was located on the snap to connect fitting that was installed with the high pressure oil pump done by H&M motors.
The notified me that the o ring had been installed with silicone. Overtime with heating this allowed the O-ring to blow out.

Once I receive the truck back, I then called H&M motors to notify them of what I informed.
I have worked with several shops on warranties. Some are great about following through with their promise others are.

Knowing how much reviews truly I really did not want to write a review about this.
But after several phone calls with H&M
It was clear that they were not willing to follow through on their warranty or even attempt to work with me.
I am disappointed about their approach on dealing with this me on the phone.
Even more disappointing that they did not even attempt to try to reconcile the.
Ultimately, it’s your choice on the shop that you choose. In my experience I wish I would have chosen another shop to use.
$7000 later and high pressure oil pump in less than a year.

Logan Adden

These guys do great work. Not the first vehicle I've had them work on and probably not the last. You get what you pay for and I trust them. They even had a 4x4 4L60E already rebuilt on the shelf so they just needed time to get it in the shop. So much better than my 300k one I roasted. Thanks guys!

Greg Lehnhoff

Have been bringing our cars here for over four years and they’ve always been great.

Kim Aaaa 71

Great service every time. I've had my diesel truck emissions done here a few times and since I'm always overdue for one, I add on an oil change/inspection. They're honest about what truly needs to be replaced right then (which was only once), and they tell me what may need replacement at my next regular inspection, even though I have those done at a place closer to home.
I've always been able to get an appointment within a few days and they get both services done in less than and hour (usually 30-45 minutes).. **I always go during weekday work hours... not evenings or weekends., so I can't speak to those busier times.

I highly recommend them for these services!

S Sims

In the two service visits I have had with H&M I have been very impressed with the professional and friendly service. As this truck is my first diesel, Greg has really offered me balanced and sound advice on how to care for it. In this last visit they were more than fair in how they handled my repair work. They have won a repeat customer as I will be back. Thank you!

Malachi Merian

Absolutely love there work they have done so much for me and my company trucks they do an amazing job.

Valerie Kirk

I have been a customer to H&M and I love those guys! They ALWAYS get it right! They price things fairly and correctly, I have never had any issues! I took my Jeep in for a misfire issue and they took great care of me. I priced the work with 2 other shops, including the dealership and they were right on the "money". I used to take my Nissan to a competitor and when I brought it to the H&M EXPERTS they found out that Keller Auto was not putting synthetic oil in my car and I just about lost it all! The mechanic flushed and fixed everything! The Nissan runs like new again! I also have my daughters Jeep serviced there! It has over 120k on it and they keep it running great!
Furthermore, they are always STRAIGHT FORWARD. They know what they are doing and I would trust them with any vehicle I own!

Thanks H&M!!