4B Diesel Services

4B Diesel Services operates out of Manor, Texas as a heavy-duty truck and trailer shop that handles welding and fabrication work alongside diesel repairs. Located just outside Austin, the outfit opened in 2017 and runs a large facility with multiple bays set up for commercial vehicles. Their crew includes shop technicians and road mechanics who stay on the job for roadside calls, fleet work, and trailer fixes. Welding fits into their daily tasks on frames, exhausts, and custom parts for trucks that roll through the area, where weather and heavy loads take a toll on rigs. They keep things moving with both in-shop and mobile service for drivers who cannot afford long downtime.

The team takes on diagnostics, oil leak repairs, front axle hub replacements, and full preventive maintenance on diesel trucks and buses. Nick and Adam have been called out in reviews for listening to driver complaints during a diagnostic visit and then skipping unnecessary work that would have cost thousands. One truck came in with oil leaking from the front axle, got inspected in under fifteen minutes, and left with the hub fixed instead of a bigger engine job. They also handle hydraulic hose work, brake jobs, transmission repairs, and fabrication on trailer frames when needed. Roadside assistance goes out for breakdowns, and customers note the crew often spots extra issues like minor leaks and knocks them out without adding charges.

Speed and straight talk keep the score high, with drivers mentioning quick turnarounds on diagnostics and clear explanations that avoided wasted money. Quality shows up in fixes that hold, like oil leaks sealed on the first try and axle work done right without follow-up calls. Price gets frequent nods for fair rates on big jobs and no padding on small ones. Communication stands out when the crew explains exactly what broke and what did not need fixing. DIRT Score 4.91 from 107 reviews on Finds.

DIRT Score = confidence-weighted rating across verified review platforms. How is this calculated? →

“Called got in the next morning for a diagnostic on my truck. More importantly they listened to my issues I was experiencing with my truck. They took that and was able to save me thousands on repairs. If you have reservations about taking your truck to a shop Nick and his team are not a place to have them. Fully recommend as an owner/ operator this is the shop to have work done.”

“Really great team, I had oil leaks they fixed all and even fixed few things for free Nick, Adam and others thank you so much 👍🙌🏻. I recommend this truck repair shop100% great price$ and the best service 📈👍”

“This is one of the best and fastest workshops I’ve ever dealt with. I had an oil leak issue from the front axle, and they inspected my truck in less than 15 minutes. They informed me that there was no leak under the engine — only from the front axle hub, which needed to be replaced. The entire process — inspection, replacement, and installation — was completed in under 45 minutes. I’m truly grateful for their professionalism and the quick, efficient service provided. Thank you for your excellent work!👍🙏”

“I changed the oil at their place and they forgot to put the cap back on, horrible... there was oil all over the hood after a few miles of driving. It's also my fault for not checking on site, but they were paid for this service. I asked for all the points of the truck to be greased and the cabin air filter to be changed, and you can see in the pictures how they greased it, a little dirty to make it look greased. I wouldn't recommend this shop even to my enemies. I give you one star, guys, that's how much your attitude towards customers costs.”

“Had at issue with my park regan not turning off. Took only 30 mins to replace a sensor, plus willing look at some other issues around the area. Definitely my Austin stop shop if I need any maintenance work. Great staff. Thank you.”