Mountainside Fleet service truck parked beside a tracked rock crusher in the mountains

Teton Valley's Diesel Repair Shop

From diesel pickups to excavators.

We work on everything from diesel pickups to excavators and everything in between, including trailer repair and hydraulic hoses.

Call (208) 909-7929Our services

What we work on

If it runs on diesel or gets towed behind it, bring it in.

  • Ram 1500 EcoDiesel on a lift with the engine out

    Diesel pickups

    Bumper-to-bumper repair, from minor fixes to major overhauls.

  • Volvo excavator being serviced on a job site

    Heavy equipment

    Excavators, loaders, haul trucks and more.

  • Loader lifting a lowboy trailer for repair

    Trailer repair

    Keep your trailers safe and hauling.

  • Hydraulic hose crimper, hose reels and fitting bins in the shop

    Hydraulic hoses

    Full in-house hose making from 1/4" to 2", built to fit your equipment.

  • Mechanic working on a Kenworth dump truck engine

    Everything in between

    Semis, dump trucks, work trucks. Just ask.

Services

We work on everything from diesel pickups to excavators and everything in between, in the shop or out on the job.

  • Ram 1500 EcoDiesel on a lift with the engine out

    Diesel pickups

    Bumper-to-bumper repair, from minor fixes to major overhauls.

  • Volvo excavator being serviced on a job site

    Heavy equipment

    Excavators, loaders, haul trucks, crushers and more.

  • Red snowcat being serviced

    Snowcats & tracked vehicles

    Where we got our start. We'll work on them anywhere, in any conditions.

  • CAT C-10 engine being lifted into a truck with a service crane

    Semis & dump trucks

    Full service, from engine replacements and overhauls to clutches and brakes.

  • Loader lifting a lowboy trailer for repair

    Trailer repair

    Keep your trailers safe and hauling.

  • Hydraulic hose crimper, hose reels and fitting bins in the shop

    Hydraulic hoses

    Full in-house hose making from 1/4" to 2", built to fit your equipment.

  • Mountainside Fleet service truck next to a haul truck on site

    Mobile repairs

    Two crane-equipped service trucks that come to your job site.

  • Mechanic working on a Kenworth dump truck engine

    Everything in between

    Not sure if we work on it? Just ask.

Two Mountainside Fleet mechanics standing on heavy equipment high on a mountain

About us

Built on the mountain

Mountainside Fleet Services is owned by Kyle Cummings and Donnie Wilmink. The two met at Arizona Snowbowl, keeping snowcats and heavy equipment running at elevation, where a breakdown means hauling parts and tools up the mountain to fix it on the spot.

In 2020 Kyle moved to Victor, Idaho, and soon after started a mobile heavy equipment repair business, bringing the shop to the job site. Donnie followed in the summer of 2021. In spring 2024 they teamed up and opened a full shop in Driggs to grow the business.

Today Mountainside Fleet Services serves Teton Valley from the shop and from the field, on everything from diesel pickups to excavators and everything in between.

Get in touch

Our shop & equipment

Set up to handle big iron in Driggs or wherever your equipment is.

Mountainside Fleet Services three-bay shop in Driggs, Idaho
  • 2Mobile service trucks with cranes
  • 3Two-post lifts rated from 9,000 to 30,000 lbs
  • 3Flat service bays
  • 1/4"–2"Hydraulic hose made in-house

Get in touch

Give the shop a call or send us an email. In the shop or in the field, we'll get you back to work.

Call (208) 909-7929 Email us
Kyle: kyle@mountainsidefleet.com Donnie: donnie@mountainsidefleet.com Shop located in Driggs, Idaho