At Mr. Diesel & Auto Repair we offer only the best products to our Cheyenne, WY drivers, that’s why we are excited to partner with Jasper Engines and Transmissions. JASPER is known for its great transmissions, some of which are even used in NASCAR. The JASPER 4-Speed Transmission is currently being used by seventeen team/driver combinations during the 2020 Monster Energy NASCAR Cup Series. The 4-Speed transmission is also being used by ten team/driver combinations for the 2020 NASCAR Xfinity Series as well.

Very honest and ethical and are people of their word! - Steve B. (4 star review on Google)

Cylinder Head

At Mr. Diesel & Auto Repair we offer only the best products to our Cheyenne drivers, that’s why we’re excited to announce the newest offering from Jasper Engines & Transmissions. JASPER is the nation’s leader in remanufactured engines and drivetrain products and now they are offering Ford/International 7.3L/444TE Diesel Cylinder Heads.

Cummins 6.7L

At Mr. Diesel & Auto Repair we offer only the best products to our Cheyenne drivers, that’s why we’re excited to announce the expanded availability of the Cummins 6.7L ISB/QSB Rear Gear Running Complete engine from our partner Jasper Engines & Transmissions. JASPER is the nation’s leader in remanufactured engines and drivetrain products.

If you are experiencing issues with the current engine on your 2013-2018 medium-duty on-road trucks, agriculture, construction, and industrial applications you now have an affordable option for an engine replacement. This engine is available with and without head studs and is completely remanufactured using a standard set of new parts. At Mr. Diesel & Auto Repair , we love JASPER products because we know that our customers can depend on the quality of the product while having peace of mind because of the warranty this great company offers.

Great service and very helpful and respectful will definitely use them again. - Brenden D. (5 star review on Google)

Great people and shop to work with.  - D&Z Garage (4 star review on Google)

David Messinger
Customer Review
★★★★★
2012 GMC Denali 2500HD - Had to have the transmission rebuilt. After I got truck looked at, I thought it was a quick service and the parts recommended was spot on. This rebuild also included a lifetime warranty, so how can you go wrong with that. Customer service was also great, mechanic followed up asking how truck was running!
Jim huntin
Customer Review
★★★★★
Always great service here everything is fixed right the first time and very professional and under budget!
  • Jasper Pref
  • 247towing
  • 24-Hour Dropoff
  • Acdelco
  • Air Lift Tow and Haul
  • Ari Fleet
  • ASE
  • B&W Trailer Hitches
  • BG Products
  • Bosch Automotive
  • Bully Dog
  • Cummins Diesel
  • Customer Savings
  • Diamond Eye Performance Exhaust
  • Duramax Diesel
  • Enterprise Fleet
  • FASS
  • Fleet Services
  • Flo Pro Performance Exhaust
  • Flowmaster
  • Ford Power Stroke Diesel
  • iATN
  • Loaner Car
  • Magnaflow
  • Magnuson
  • MBRP
  • Motorcraft Parts
  • NFIB
  • Pet Friendly
  • Radiator
  • Reese Hitches
  • Sinister Diesel
  • Synchrony
  • Tech-net
  • Valvoline
  • 24 Month Warranty
  • Welding
  • Wifi Available