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

S & K Transmission & Diesel Repair
Transmission Repair, Truck & RV Repair and Maintenance, Semi Truck Services, 24/7 Mobile Truck Repair in Phoenix and the Surrounding Areas

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Truck Transmission

Repair

Complete automatic and manual truck transmission repair & rebuilding.

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Truck & RV Repair and

Maintenance

Full service repair and maintenance for all trucks rated ½ ton and larger.

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Semi Truck

Services

Professional big rig repair and maintenance for all makes & models of semis.

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24/7 Mobile

Truck Repair

Roadside big rig and commercial vehicle repair throughout Metro Phoenix.

  • Allison Transmission Services
  • Transmission Repair
  • Transmission Rebuilding
  • Transmission Replacement
  • Truck Repair
  • Truck Maintenance
  • Semi Truck Repair
  • Semi Truck Maintenance
  • 24/7 Mobile Semi Truck Repair
  • 24/7 Roadside Diesel Repair
  • Truck Engine Repair
  • Truck Brake Repair
  • Diesel Repair & Maintenance
  • ASE Certified
The ase certified logo is blue and white with a gear in the middle.

Locally owned and operated S&K Transmission & Diesel Repair offers professional transmission repair, truck service and big rig repair in Phoenix.

At our full service facility for gas and diesel trucks rated at ½ ton and larger, we cater to drivers of all domestic and foreign work pickups, commercial vehicles, buses, fleets, municipal vehicles and semis. We know that if your truck isn’t on the road, it isn’t making you money. We're committed to providing you 24/7 assistance. We will contact a local tow truck company, setup to have your vehicle towed to our shop for fast and accurate repair and maintenance services. Whether you need routine care, such as an oil change, fluid flush or other factory truck maintenance, or more complex repairs, like diesel engine repair, truck transmission rebuilding or a semi-truck brake job, we’ve got you covered. At the first sign of trouble, or any time your rig needs scheduled fleet vehicle maintenance in Phoenix, give our nearby truck shop a call. We’d be happy to schedule you an appointment or provide an estimate for the cost of semi-truck repair in Phoenix, or a quote for any of our outstanding services.

As a local transmission shop and truck service center, the team at S&K Transmission & Diesel Repair takes great pride in helping our friends and neighbors in Phoenix, Glendale, Peoria and the surrounding communities, as well as those just passing through. Our facility is a NAPA AutoCare Center and our truck mechanics are all ASE Certified, so rest assured you’ll receive quality service. On top of that, we regularly invest in the latest truck repair tools and technology, ensuring accurate diagnostics and quick turnarounds. In short, we fix truck problems fast and right, getting you back out on the road. To learn more about our extensive 18-wheeler, transmission and other truck repair and maintenance services, give S&K Transmission & Diesel Repair a call at (623) 244-8887. We look forward to serving you at our state of the art truck repair shop in Phoenix.

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Allison transmission logo on a white background

S&K Transmission & Diesel Repair Blog

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