Our Services

Marine Services

We specialize in inboard engine diagnostics, maintenance, and rebuilds—dockside or in-shop. Whether it’s routine service or a full repower, we keep your vessel reliable on the water.

Services include:

  • Mobile dockside service

  • Generator troubleshooting and repair

  • Engine surveys, rebuilds, and repowers

  • Winterizing and spring commissioning

  • Electrical system diagnostics

  • Fuel system diagnosis and repair

Truck Services

Our truck and transmission services deliver the expertise, reliability, and precision needed to keep trucks and fleets on the road.

Engine, Suspension & Drivetrain

  • General maintenance and tune-ups

  • In-frame and out-of-frame overhauls

  • Counterbore reconditioning

  • Fuel and oil system upgrades

  • Driveshaft, rear-end, and wheel-end repair

  • Clutch replacements and flywheel reconditioning

  • Eaton Fuller transmission service

  • OEM and budget-friendly parts options

Allison Transmission Specialists

  • Allison Series 1000–4000 diagnostics and repair

  • ECM programming and calibration

  • Drivetrain integration and troubleshooting

  • Preventative maintenance and performance optimization

Preventative, Inspection & Specialty Services

  • Pre-purchase vehicle surveys

  • Fuel polishing services

  • Oil analysis panels

  • Peterbilt and Kenworth front-end air ride kits

  • Tractor-trailer full detailing services

Fabrication,welding and line boring

At Sundown Diesel, we provide full-service welding, fabrication, and precision repair for construction, agricultural, and industrial equipment. From structural cracks to worn components, we deliver heavy-duty solutions that keep your machines and property working in the toughest conditions.

Services include:

Stick and TIG welding for heavy-duty applications

Heavy equipment welding and structural repair (buckets, frames, attachments, implements)

Line boring for worn pin bores and pivot points

Hard-facing to extend the life of high-wear components

Custom fabrication and equipment modification

Farm machinery repair (tractors, plows, loaders, implements)

Pipe fencing and gate fabrication for agricultural and livestock use

Carbon steel and stainless steel welding