J&S Transit, LLC & Diesel Performance

08/30/2026

🛠️ Protecting Your CP4 Fuel System
2011–2016 LML Duramax & 2011+ 6.7L Powerstroke

If your truck has a Bosch CP4 high-pressure pump, you probably already know the risks. Low-lubricity ULSD, contamination, water, gasoline, and air in the fuel can take that pump out. When it fails, it often sends metal through the rails, lines, and all eight injectors. That’s a $10,000+ job.

Ford and GM built these systems differently, so the protection plan is different too.

Want a price for fuel system upgrades on your truck? Message us with year, make, model, and mileage. We’ll discuss which path fits your situation best and what parts + labor looks like.

J&S Diesel Performance

01/26/2024

Check out our first reel and give it a like!

09/28/2023

Attention All Pullers!!!
If you not aware most all the sleds you hook are leval 8 sleds under the North America Sled Operator Association and this organization is the liability insurance holder for the sleds that are members of the NASOA. [Almost every sled you hook are members.] This means they are rated for ALL CLASSES and this translates to the largest chain and hook, due to all the recent accidents and vehicles tossing the hook out of the hitch the anti-unhook tab on the hook is being enforced to the max and other safety features as well.

So what does that have to do with me as a puller you ask. THIS MEANS IF YOUR HITCH HOLE IS NOT 3 INCHES WIDE X 3 3\4 INCHES DEEP THE HOOK WILL NOT GO IN YOUR HITCH HOLE AND YOU WILL NOT BE ABLE TO HOOK TO THE SLED!
This rule applys to farm tractors and antique tractors as well! THE HOOK WILL NOT BE MODIFIED TO ACCOMMODATE YOU FROM NOW ON!
We are sorry if this should inconvenience you in any way especially on the farm stocks and the antiques, unfortunately we answer to a governing body that provides our insurance at a fraction of the price than if we provided it ourselves. With that being said insurance companies are really cracking down on all safety aspects of our pulling sport. I say this with deep concerns if you would like to keep pulling I would encourage you to check your equipment more often and if you know you have a hitch that isn't built heavy enough please take the time over the winter to correct these issues. We are only a few more incidents away from losing any insurance coverage for sleds and promoters and when the insurance is unavailable especially the sanctioned events will be no more. Accidents happen and we cannot avoid that but when we are negligent with our equipment that's on us and we need to be a little more diligent in keeping our equipment up to date with the horsepower that we are making today. Thank you for taking time to read this and I hope you understand.

The picture shows what we are addressing this has been in play for several years but the length is increasing!

Everyone please share this!

Sincerely,

Southern Express Pulling LLC

08/19/2023

Give us a call for your FASS filter needs!

06/19/2023

Great opportunity to join a growing company!

Diesel Mechanic / Automotive Technician Needed:

J&S Diesel Performance, a highly competitive diesel repair and performance shop in SW Wisconsin, is accepting applications for a Diesel Truck Mechanic in Cashton, WI.

The ideal candidate is mechanically inclined and has formal education or experience in the diesel or automotive industries. This is an excellent opportunity to join a growing and successful diesel performance shop and team.

Responsibilities include:
• Perform corrective & preventative maintenance, diagnostics & services with efficiency on light & medium duty diesel trucks
• Test components and systems using diagnostic tools and special service equipment
• Diagnose, maintain, and repair vehicle automotive systems (electrical and mechanical)
• Troubleshoot various systems, including electrical, drive train, HVAC, brake, engine, and suspension, identify needed repairs, and perform corrective action
• Verify vehicle serviceability by conducting test drives; adjusting controls and systems
• Write up repair orders in an accurate, clear, and detailed description of the cause of failure and the repair procedure(s) needed/used
• Maintain a safe and professional repair shop along with good customer relations

Qualifications:
• Experience in a diesel repair environment
• Dependable and reliable attendance for scheduled work shifts
• Willingness and capacity to assume increased responsibility

J&S supplies specialized tooling, so you do not need your own tools to start. Competitive pay will be based on experience and tools.

If interested, call Samuel at (608)632-3544 or send your resume to [email protected]. We are located in the Cashton, Wisconsin, area.

Great opportunity to join a growing company!

Diesel Mechanic / Automotive Technician Needed:

J&S Diesel Performance, a highly competitive diesel repair and performance shop in SW Wisconsin, is accepting applications for a Diesel Truck Mechanic in Cashton, WI.

The ideal candidate is mechanically inclined and has formal education or experience in the diesel or automotive industries. This is an excellent opportunity to join a growing and successful diesel performance shop and team.

Responsibilities include:
• Perform corrective & preventative maintenance, diagnostics & services with efficiency on light & medium duty diesel trucks
• Test components and systems using diagnostic tools and special service equipment
• Diagnose, maintain, and repair vehicle automotive systems (electrical and mechanical)
• Troubleshoot various systems, including electrical, drive train, HVAC, brake, engine, and suspension, identify needed repairs, and perform corrective action
• Verify vehicle serviceability by conducting test drives; adjusting controls and systems
• Write up repair orders in an accurate, clear, and detailed description of the cause of failure and the repair procedure(s) needed/used
• Maintain a safe and professional repair shop along with good customer relations

Qualifications:
• Experience in a diesel repair environment
• Dependable and reliable attendance for scheduled work shifts
• Willingness and capacity to assume increased responsibility

J&S is supplied with specialized shop tooling, so you do not need your own tools to start. Competitive pay will be based on experience and tools.

If interested, call Samuel at (608)632-3544 or send your resume to [email protected]. We are located in the Cashton, Wisconsin, area.

05/18/2023

Great opportunity to join a growing company!

Diesel Mechanic / Automotive Technician Needed:

J&S Diesel Performance, a highly competitive diesel repair and performance shop in SW Wisconsin, is accepting applications for a Diesel Truck Mechanic in Cashton, WI.

The ideal candidate is mechanically inclined and has formal education or experience in the diesel or automotive industries. This is an excellent opportunity to join a growing and successful diesel performance shop and team.

Responsibilities include:
• Perform corrective & preventative maintenance, diagnostics & services with efficiency on light & medium duty diesel trucks
• Test components and systems using diagnostic tools and special service equipment
• Diagnose, maintain, and repair vehicle automotive systems (electrical and mechanical)
• Troubleshoot various systems, including electrical, drive train, HVAC, brake, engine, and suspension, identify needed repairs, and perform corrective action
• Verify vehicle serviceability by conducting test drives; adjusting controls and systems
• Write up repair orders in an accurate, clear, and detailed description of the cause of failure and the repair procedure(s) needed/used
• Maintain a safe and professional repair shop along with good customer relations

Qualifications:
• Experience in a diesel repair environment
• Dependable and reliable attendance for scheduled work shifts
• Willingness and capacity to assume increased responsibility

J&S is supplied with specialized shop tooling, so you do not need your own tools to start. Competitive pay will be based on experience and tools.

If interested, call Samuel at (608)632-3544 or send your resume to [email protected]. We are located in the Cashton, Wisconsin, area.

05/17/2023

First Diesel Truck Points Hooks Coming Right Up! June 16th in Soldiers Grove.

NEW DATE ADDED! We are excited to be back in Soldiers Grove! Southwest WI Pullers will be there Friday June 16th with 5 classes! The board knows its not the best practice to add events this close to the season starting but felt this is a good fit and has great potential to be on our schedule year after year, thanks to the Soldiers Grove Fire Dept!

05/01/2023

See last post!

05/01/2023

LOL

04/02/2023

Get a hold of us for all of your built transmission needs! The only torque converter we use in all our builds and complete transmission kits built to your power output for the 47, & 48REdodges!