21426 N 14th Ave. Phoenix, AZ 85027 | Mon-Fri 8am-5pm Sat: By Appt. | (623) 244-8887
Hiring Diesel Technicians, $5,000 Sign-On Bonus

24/7 Mobile Truck Repair in Phoenix, Tucson, Prescott, Flagstaff and the Surrounding Areas

Unscheduled truck downtime can result in massive losses in time and money. At S&K Transmission & Diesel Repair, we fully understand this. That’s why we provide 24/7 mobile truck repair in Phoenix, Tucson, Prescott, Flagstaff and the surrounding communities for all types of diesel big rigs, fleets and commercial vehicles. Our goal is to get you back on the road fast to minimize loss. From diesel engine repair to electrical services, our fast roadside semi truck repair services near Phoenix are second to none. Give us a call day or night to request a diesel mechanic be immediately dispatched to your location.

an orange truck with the hood up and the door open
  • 24/7 Semi Truck Repair
  • Roadside big Rig Repair
  • Mobile DieselRepair
  • Mobile Diesel Diagnostics
  • Mobile Truck Engine Repair
  • Mobile Transmission Repair
  • Mobile Fleet Vehicle Repair
  • Mobile Charter Bus Repair
  • Mobile Heavy Duty Vehicle Repair
  • 24/7 Diesel Repair
  • 24/7 Emergency Diesel Repair
  • Mobile Commercial Vehicle Repair
  • Mobile 18 Wheeler Repair
  • Mobile Tractor Trailer Repair
  • Semi Truck Towing Services
  • Big Rig Towing Near Phoenix
A close up of a truck engine with the hood open.

24/7 Mobile Engine Repair & Diagnostics

Our nearby mobile diesel engine mechanics are equipped to diagnose and solve many problems that can cause breakdowns and performance loss. By combining computer assisted diagnostic scanners with years of hands on experience, we can quickly and correctly identify and fix big rig engine issues. If your truck won’t start, is making odd noises or is suffering from a decrease in performance, call us right away to request roadside truck engine repair near Phoenix. We’ll arrive with the right parts, tools and knowledge to get you back on the road.

Mobile Truck Transmission Repair

Semi truck transmission trouble can cause your delivery to grind to a halt, quite literally. Our mobile truck repair mechanics in Phoenix can fix truck transmissions on location for all makes and models of diesel vehicles. If you’re having trouble getting through the gears, experience clutch problems or are unable to shift at all, don’t delay calling S&K Transmission & Diesel Repair. We’ll send an experienced tech to perform roadside semi truck transmission repair to get you back on schedule fast.


Mobile Electric Repair

Our local truck mechanics offer professional roadside electrical repair services for big rigs and other commercial vehicles. Whether you need truck lighting repair, ignition system repair, semi starter repair, dashboard electrical repair, power accessory repair, trailer connection repairs or other truck electrical repair, we can get the job done. Give our mobile semi mechanics a call 24/7 to request immediate assistance.

Mobile Alternator/Fuel Pump Replacement

At S&K Transmission & Diesel Repair, two of the most common roadside truck repairs we perform are semi truck alternator repair and semi truck fuel pump repair. Both a faulty alternator and failed fuel pump can prevent your engine from running, so we work quickly to resolve these issues to ensure you don’t fall behind schedule. Signs of semi alternator trouble include odd electrical problems, dim or flickering lights, or a semi truck battery that dies repeatedly. If you notice your truck engine has a rough idle or cranks over and over without starting, it may need fuel pump replacement. Reach out immediately to request 24/7 roadside truck diagnostics.

A man is working on a truck engine with a wrench.

24/7 Roadside Truck Repair & Semi Truck Towing

Our full service roadside truck mechanics in Phoenix are available 24/7 to perform work on Highway 10, Highway 17 and Highway 60 and the surrounding roadways. While we can resolve most issues on location, if there is a problem that requires additional work that can’t be completed where the truck sits, we can arrange for big rig towing to a trusted truck repair shop in Flagstaff, Prescott or Phoenix. When trouble strikes, make us your first and only call.

A red semi truck is driving down a highway.

If you suffer a fleet vehicle breakdown, 18 wheeler trouble or other commercial vehicle problems, contact S&K Transmission & Diesel Repair for 24/7 mobile truck repair in Phoenix and the surrounding area. Our goal is to minimize downtime and maximize your rig’s reliability. To request nearby roadside semi repair day or night, call our team at 623-244-8887 and we’ll immediately dispatch a qualified mobile truck technician.

S&K Transmission & Diesel Repair Blog

White semi-truck driving on a winding road under a clear blue sky

4 Ways to Help Prevent Major Engine Issues in Your Semi Truck

By S&K Transmission & Diesel Repair • August 29, 2026
Whether you're hauling freight across the country or making local deliveries, your engine is subjected to long hours of operation, heavy loads, and demanding driving conditions. Major engine repairs can be extremely expensive and lead to significant downtime, making preventive maintenance essential for keeping your truck on the road. By taking a proactive approach to engine care, you can reduce the risk of serious problems. Here are four ways to help prevent major engine issues in your semi truck. Stay Current with Oil Changes Regular oil changes are one of the most important maintenance tasks for any diesel engine. Engine oil lubricates moving parts, reduces friction, and helps control operating temperatures. Over time, oil breaks down and becomes less effective, increasing wear on critical engine components. Following the manufacturer's recommended oil change intervals helps keep your engine properly protected. Monitor the Cooling System Overheating is a leading cause of serious engine damage in heavy-duty trucks. Regularly inspect coolant levels, radiator hoses, belts, and the radiator for signs of leaks or wear. Watch the engine temperature gauge during every trip and investigate any signs of overheating immediately. Routine cooling system inspections can identify worn components before they lead to expensive engine repairs. Address Warning Signs Promptly Small engine problems often become major repairs when ignored. If you notice unusual noises, excessive exhaust smoke, reduced power, fluid leaks, warning lights, rough operation, or declining fuel-economy, schedule a professional inspection as soon as possible. Early diagnosis can often resolve minor issues before they result in catastrophic engine damage. Schedule Routine Preventive Maintenance Preventive maintenance allows experienced diesel technicians to inspect your truck for developing problems before they become costly failures. During routine service, technicians can check belts, hoses, fluids, sensors, electrical systems, and other engine components while identifying worn parts that should be replaced. Regular inspections also help ensure your truck remains reliable and ready for demanding workloads. Semi Truck Maintenance in Phoenix, AZ For expert semi truck repair and maintenance in Phoenix and the surrounding area, contact S&K Transmission & Diesel Repair at  623-244-8887  . Feel free to give us a call to male an appointment!
White semi-truck driving on a winding road under a clear blue sky

4 Ways to Help Prevent Major Engine Issues in Your Semi Truck

By S&K Transmission & Diesel Repair • August 29, 2026
Whether you're hauling freight across the country or making local deliveries, your engine is subjected to long hours of operation, heavy loads, and demanding driving conditions. Major engine repairs can be extremely expensive and lead to significant downtime, making preventive maintenance essential for keeping your truck on the road. By taking a proactive approach to engine care, you can reduce the risk of serious problems. Here are four ways to help prevent major engine issues in your semi truck. Stay Current with Oil Changes Regular oil changes are one of the most important maintenance tasks for any diesel engine. Engine oil lubricates moving parts, reduces friction, and helps control operating temperatures. Over time, oil breaks down and becomes less effective, increasing wear on critical engine components. Following the manufacturer's recommended oil change intervals helps keep your engine properly protected. Monitor the Cooling System Overheating is a leading cause of serious engine damage in heavy-duty trucks. Regularly inspect coolant levels, radiator hoses, belts, and the radiator for signs of leaks or wear. Watch the engine temperature gauge during every trip and investigate any signs of overheating immediately. Routine cooling system inspections can identify worn components before they lead to expensive engine repairs. Address Warning Signs Promptly Small engine problems often become major repairs when ignored. If you notice unusual noises, excessive exhaust smoke, reduced power, fluid leaks, warning lights, rough operation, or declining fuel-economy, schedule a professional inspection as soon as possible. Early diagnosis can often resolve minor issues before they result in catastrophic engine damage. Schedule Routine Preventive Maintenance Preventive maintenance allows experienced diesel technicians to inspect your truck for developing problems before they become costly failures. During routine service, technicians can check belts, hoses, fluids, sensors, electrical systems, and other engine components while identifying worn parts that should be replaced. Regular inspections also help ensure your truck remains reliable and ready for demanding workloads. Semi Truck Maintenance in Phoenix, AZ For expert semi truck repair and maintenance in Phoenix and the surrounding area, contact S&K Transmission & Diesel Repair at  623-244-8887  . Feel free to give us a call to male an appointment!

Quick Tips for Preventing Serious Transmission Problems in Your Semi Truck

By S&K Transmission & Diesel Repair • July 21, 2026
A semi truck's transmission is one of the hardest-working components on the vehicle, handling heavy loads and countless miles under demanding conditions. Whether you're driving long-haul routes or making frequent local deliveries, proper transmission maintenance is essential for maximizing performance and avoiding costly repairs. Fortunately, a few good maintenance habits can go a long way toward extending the life of your transmission. Here are four tips for keeping your semi truck's transmission in great shape. Follow the Recommended Maintenance Schedule Routine maintenance is one of the best ways to prevent transmission problems. Follow the service intervals recommended by the transmission manufacturer for fluid changes, filter replacements, and inspections. Clean transmission fluid provides proper lubrication and cooling while helping maintain the hydraulic pressure needed for smooth shifting. Skipping scheduled maintenance allows contaminants to build up and accelerate internal wear. Check Transmission Fluid Regularly Transmission fluid plays a critical role in lubricating gears, reducing heat, and ensuring proper operation. Regularly inspect the fluid level and condition according to your truck manufacturer's guidelines. Low fluid levels, dirty fluid, or signs of leaks should be addressed immediately. Catching a small transmission fluid leak early can prevent overheating and major internal damage. Don't Ignore Early Warning Signs Transmission problems often provide warnings before escalating. Difficulty shifting, delayed gear engagement, grinding noises, slipping gears, unusual vibrations, or warning lights should all be inspected promptly. Addressing smaller issues early often prevents much larger and more expensive repairs later. Ignoring symptoms may result in complete transmission failure and costly downtime. Reduce Heat Buildup Excessive heat is one of the leading causes of transmission failure in heavy-duty trucks. Avoid overloading your truck beyond its rated capacity and make sure the cooling system is functioning properly. Regularly inspect the transmission cooler and related components to ensure they’re operating efficiently. Keeping transmission temperatures under control helps prevent premature wear. Semi Truck Transmission Repair in Phoenix, AZ For expert truck transmission repair in Phoenix and the surrounding area, contact S&K Transmission & Diesel Repair at  623-244-8887  . Feel free to give us a call to make an appointment for big rig repair in greater Phoenix, AZ!

Basic Ways to Help Prevent Serious Transmission Problems in Your Semi Truck

By S&K Transmission & Diesel Repair • June 28, 2026
Your semi truck's transmission is one of the most important and expensive components in the drivetrain. It endures tremendous stress as it transfers power from the engine to the wheels while hauling heavy loads over long distances. Transmission repairs and replacements can be costly, making preventive maintenance essential for keeping your truck on the road and minimizing downtime. At S&K Transmission & Diesel Repair, we provide expert semi truck transmission service in the greater Phoenix area. Here’s a look at four tips for preventing serious transmission problems in your semi truck. Follow Recommended Transmission Service Intervals Routine maintenance is one of the best ways to protect your transmission. Following the manufacturer's recommended service schedule for fluid changes, filter replacements, and inspections helps ensure the system remains properly lubricated and free of harmful contaminants. Regular maintenance can also help identify small issues before they become major repairs. Monitor Transmission Fluid Condition Transmission fluid plays a critical role in cooling, lubricating, and protecting internal components. Low fluid levels, contaminated fluid, or fluid that has broken down due to age can increase wear and heat buildup. Regularly checking transmission fluid levels and condition can help prevent unnecessary damage. Avoid Overloading the Truck Consistently hauling loads that exceed the truck's recommended weight capacity can place excessive strain on the transmission. Overloading forces the transmission to work harder than designed, increasing heat and accelerating component wear. Staying within manufacturer weight limits can significantly reduce stress on the transmission. Address Warning Signs Immediately Unusual noises, slipping gears, fluid leaks, and warning lights should never be ignored. These symptoms often indicate developing transmission problems that can worsen quickly if left unresolved. Prompt diagnosis and repair can prevent more extensive and expensive damage. Semi Truck Transmission Service in Phoenix, AZ For expert truck transmission service in Phoenix and the surrounding area, contact S&K Transmission & Diesel Repair at  623-244-8887  . Feel free to give us a call to schedule an appointment for big rig repair in greater Phoenix, AZ!
Purple semi truck parked in a lot, side view with chrome exhaust stacks and sleeper cab

Common Questions About Semi Truck Cooling System Repair in Phoenix

By S&K Transmission & Diesel Repair • May 29, 2026
Learn about semi truck cooling system repair. Understand common issues & maintenance needs. Contact S & K Transmission & Diesel Repair today!
Close-up of a red semi-truck driving on a highway with blurred traffic in the background

Why It’s So Important to Keep Up With Your Commercial Truck’s Oil Change Schedule

By S&K Transmission & Diesel Repair • April 23, 2026
Regular oil changes are vital for your commercial truck. Prevent breakdowns & improve fuel efficiency with S & K's expert services.
Red semi-truck hauling a white trailer on a пуст desert highway at sunset

4 Reasons to Address Semi Truck Cooling System Issues ASAP

By S&K Transmission & Diesel Repair • March 26, 2026
Address semi truck cooling system issues to prevent engine damage & breakdowns. Trust S&K Transmission & Diesel Repair for expert service.
Close-up shot of truck tires, focusing on the shiny rims and dark tires. Black and white.

FAQs About Semi Truck Suspension Repair in Phoenix, AZ

By S&K Transmission & Diesel Repair • February 28, 2026
Learn about semi truck suspension repair, signs of issues, and the repair process. Contact S & K Transmission & Diesel Repair for expert service!
Gray industrial diesel engine with belts, pipes, and filters.

Frequently Asked Questions About Semi Truck Fuel System Repair

By S&K Transmission & Diesel Repair • January 28, 2026
Get expert insights on semi truck fuel system repair, including signs of issues & maintenance tips. Contact S & K Transmission & Diesel Repair today!
Mechanic using a forklift to move a heavy engine in a repair shop. Another man observes.

Why Semi Truck Transmission Problems Should Never Be Ignored

By S&K Transmission & Diesel Repair • December 22, 2025
Ignoring semi truck transmission issues can lead to costly repairs and safety risks. Contact us for expert repair services today!
Purple semi-truck with silver accents parked outside. A school bus and a white van are nearby under a sunny sky.

Common Signs of Semi Truck Suspension Trouble

By S&K Transmission & Diesel Repair • October 29, 2025
Learn the signs of semi truck suspension issues. Contact S & K Transmission & Diesel Repair for expert solutions today!