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Inside the Full Send Diesel shop

Home Services

Diesel repair and performance services.

Diagnostics, engines, fuel, turbos, transmissions, suspension, maintenance, upfits, fabrication and complete builds for Cummins, Duramax and Power Stroke trucks.

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Diagnostics and electrical

Diagnostics

Diagnostics and electrical

Modern diesels are full of sensors, modules and emissions systems. We find the actual cause with proper diagnostic equipment and experience, then quote the repair before any work starts.

  • Check engine lights and fault codes
  • Regen, DPF and DEF system faults
  • Limp mode and low power
  • No start and hard start problems
  • Charging, wiring and module issues
  • Intermittent problems other shops could not find

Every diagnosis comes with a written estimate before repairs begin.

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Engine repair and replacement

Engines

Engine repair and replacement

From head studs to a complete long block, we repair and replace Cummins, Duramax and Power Stroke engines and inspect the supporting parts while we are in there.

  • Head gaskets and head studs
  • Oil cooler and EGR cooler repair
  • Front covers, timing and seals
  • Factory replacement long blocks
  • Built engines for power and towing
  • Engine swaps
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Fuel systems and injection

Fuel systems

Fuel systems and injection

Fuel system problems cause most diesel drivability complaints. We diagnose and repair injection systems and supply the parts that keep them healthy.

  • Injector testing and replacement
  • CP3 and CP4 injection pumps
  • Lift pumps and filtration
  • Fuel leaks and contamination
  • Fuel tanks, including medium duty trucks
  • Fuel system upgrades
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Turbochargers and air

Turbochargers

Turbochargers and air

Turbo replacements, upgrades and the boost, intake and exhaust work that goes with them, including custom heat wraps made in our fab shop.

  • Turbo replacement and upgrades
  • Boost leaks and intercooler piping
  • VGT actuators and sticking vanes
  • Intake and exhaust upgrades
  • Turbo heat wraps and blankets
  • Compound turbo setups
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Transmissions and clutches

Transmissions

Transmissions and clutches

Automatic and manual transmission repair, rebuilds and replacements for heavy duty diesel trucks, plus the coolers and lines that keep them alive.

  • 68RFE, Aisin, Allison and TorqShift
  • Torque converters
  • Transmission coolers and lines
  • Clutches and flywheels
  • Transfer cases
  • G56 manual conversions

We built the first fully functional G56 swapped 5th gen Ram, as covered by Diesel Army.

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Axles, suspension and steering

Drivetrain and suspension

Axles, suspension and steering

Differentials, axles, shocks and steering for trucks that tow, haul and work hard, plus leveling and lift installs.

  • Differential service and covers
  • Axle and gear work
  • Shocks and coilovers
  • Leveling and lift kits
  • Steering components and stabilizers
  • Wheel and tire setups
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Maintenance, brakes and cooling

Maintenance

Maintenance, brakes and cooling

The routine work that keeps a diesel running for hundreds of thousands of miles, done by technicians who know what to look for on every generation.

  • Oil and filter changes
  • Fuel filters and fluids
  • Brakes, rotors and calipers
  • Radiators, hoses and cooling systems
  • Belts, batteries and charging
  • Inspections while it is on the lift
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Lighting and work truck upfits

Work truck upfits

Lighting and work truck upfits

Warning lights, auxiliary lighting and switch panels for contractors, plow trucks and work fleets, wired cleanly and built to hold up.

  • Strobe and warning lights
  • Light bars and auxiliary lighting
  • Switch panels and clean wiring
  • Work truck accessories
  • Installs for single trucks or fleets
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Performance upgrades

Performance

Performance upgrades

Reliable power built with the same parts we sell on fullsenddiesel.com and run on our own trucks, with the cooling and transmission upgrades to support it.

  • Turbo and injector upgrades
  • Fuel system upgrades
  • Head studs and supporting mods
  • Transmission upgrades for power
  • Cooling upgrades
  • Built engines
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Welding and fabrication

Fabrication

Welding and fabrication

Our in house fab shop builds the parts you cannot buy: TIG welded piping, exhaust, brackets, mounts and structural work.

  • TIG welded intercooler and turbo piping
  • Custom exhaust systems
  • Brackets and mounts
  • Chassis and structural work
  • Turbo heat wraps
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Custom and show builds

Custom builds

Custom and show builds

Complete builds planned, built and finished in house, from daily driven Cummins trucks to giveaway trucks and our Lamborghini Huracán for SEMA 2026.

  • Complete custom builds
  • Show and SEMA builds
  • Engine and transmission swaps
  • Powder coating and Cerakote finishes
  • Interior and electrical work
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Fleet services

Keep your work trucks earning.

Contractors and businesses across the area trust us with the diesel trucks that make them money. Pickups, duallies, cab and chassis and medium duty trucks, all serviced by diesel technicians.

Call to set up fleet service Send us your fleet details
Fleet work truck in the shop
Medium duty dump truck
Work truck lighting install

  • Preventive maintenance

    Oil, filters, fluids and inspections of brakes, steering and suspension every time a truck is on the lift.

  • Diagnostics and repair

    Engine, transmission, fuel and electrical repairs diagnosed properly and quoted before work starts.

  • Brakes and suspension

    Pads, rotors, calipers, shocks and steering for trucks that tow and haul all day.

  • Fuel systems and tanks

    Injection, lift pumps, filtration and fuel tank work, including medium duty trucks.

  • Lighting and upfits

    Strobes, warning lights, light bars and switch panels installed cleanly on work trucks.

  • One shop for the fleet

    Ram, Ford, Chevy and GMC diesels in the same building, with one contact for every truck.

Trucks we work on

Cummins, Duramax and Power Stroke.

Every generation, from early 12 valve Cummins to the latest L5P and 6.7 trucks.

  • Cummins

    Cummins

    5.9L 12 valve, 5.9L 24 valve, 6.7L

    Ram trucks from 1989 to today. Injectors, turbos, head studs, 68RFE and Aisin transmissions, and manual swaps.

  • Duramax

    Duramax

    LB7, LLY, LBZ, LMM, LML, L5P

    Chevy and GMC trucks from 2001 to today. Injectors, CP4 failures, Allison transmissions, cooling and engine replacement.

  • Power Stroke

    Power Stroke

    7.3L, 6.0L, 6.4L, 6.7L

    Ford trucks from 1994 to today. Head studs, oil coolers, injectors, turbos and TorqShift transmissions.

How it works

From your first call to keys in hand.

No guesswork and no surprises. You know what is wrong and what it costs before we touch your truck.

  1. 1

    Call or send the details

    Tell us the year, engine, mileage and what is going on, by phone or with the online form.

  2. 2

    We diagnose the truck

    Our technicians find the real cause instead of guessing with parts.

  3. 3

    You approve a written estimate

    You get a clear plan and price before any work begins.

  4. 4

    We fix it and keep you updated

    Updates and photos while your truck is here, and a walkthrough when you pick it up.

Reviews

Customers trust us with their trucks.

Rated 4.9 stars on Google by diesel owners across the area.

4.9 Google rating
  • By far the best diesel repair shop for light trucks. Very few people are dedicated to their work like Kevin and his team. Couldn’t be happier.

    Frank W.Google review

  • Had some transmission, and grid heater upgrades done, 100% satisfied! … I feel like I made some new friends as well! Thank you!

    Martin K.Google review

  • Took my truck to FSD to get some work done to it. I was very pleased with the quality of work … I will only be taking my truck to them going forward.

    Cole C.Google review

Read all our reviews on Google

Questions

Common questions.

Do not see your question here? Call the shop and talk to someone who works on diesels every day.

Call (908) 674-1350
What trucks do you work on?

We focus on diesel trucks: Cummins powered Rams, Duramax powered Chevy and GMC trucks, and Power Stroke powered Fords, plus diesel work trucks for fleets.

Will I get a price before you start?

Yes. Every job starts with a diagnosis and a written estimate, and nothing gets done until you approve it.

How do I schedule my truck?

Call (908) 674-1350 or fill out the online work request. We follow up during shop hours to set a drop off date.

Do you work on fleets and work trucks?

Yes. We service pickups, duallies, cab and chassis and medium duty diesel trucks for contractors and businesses, from one truck to a whole fleet.

Can you install performance parts?

Yes. We install parts from the brands we sell on fullsenddiesel.com, including our own Full Send Diesel parts, along with the supporting upgrades they need.

Where are you and when are you open?

300 Industrial Dr, Nazareth, PA 18064. Monday to Friday, 8:00 am to 4:00 pm.

Ready to get your truck in?

Call the shop and talk to someone who knows diesels, or send us the details online and we will get back to you.

Call (908) 674-1350 Schedule online
Address
300 Industrial Dr
Nazareth, PA 18064
Get directions
Hours
Monday to Friday
8:00 am to 4:00 pm