Goodfellas Diesel

Goodfellas Diesel Welcome to Goodfellas Diesel!! The Champlain valley's home for diesel performance. specializing in all Cummins, Powerstroke, and Duramax powered trucks.

Maintenance and repair, head gasket jobs, engine overhauls, transmissions, cab-offs and more! XDP diesel Authorized dealer
BD power Authorized dealer
FASS fuel systems Authorized dealer
South Bend Clutches Authorized dealer
S&B filters Authorized dealer
Weathertech Authorized dealer
F1 flux diesel injection

Authorized dealer
Randy’s transmissions Authorized dealer
Muldoons Authorized dealer
Power driven diesel Authorized dealer
MDC/ Smeding diesel Authorized dealer
Maverick diesel Authorized dealer

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06/11/2026

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Sometimes you just get lucky! This is a customers truck that came in needing a headgasket. This is a 1,000hp+ truck with...
06/11/2026

Sometimes you just get lucky!

This is a customers truck that came in needing a headgasket. This is a 1,000hp+ truck with big fuel and big compounds and a stage 1 D&J Precision Machine cylinder head that's been going strong and taking a licking for the last 2 years. We noticed an exhaust valve on #6 was chipped and we can only assume had been like this for a good while. The boys at D&J overnighted a new valve and it's back to the streets putting in the work on you T&D boys 🫣

Want to take your truck to the next level?
Call/text 802-558-5527
Goodfellasdiesel.com

🇺🇸 250 Years of America Summer Sale at GoodFellas Diesel 🇺🇸The parts are rolling in and the builds are moving! We’ve got...
06/11/2026

🇺🇸 250 Years of America Summer Sale at GoodFellas Diesel 🇺🇸

The parts are rolling in and the builds are moving! We’ve got multiple 68RFEs on the bench this week loaded with proven components from Randy’s Transmissions. We experienced a longer-than-normal lead time while Randy’s completed their facility move, but we’re fully restocked and putting in the extra hours to get caught up and keep your trucks on the road.

Whether you’re looking for a 48RE, 68RFE, 6R140, 5R110W, or another diesel transmission build, we have options ranging from stock replacement units to high-horsepower performance builds.

🔥 Now through July 4th:
✅ $250 OFF any transmission build
✅ FREE billet flexplate
✅ FREE upgraded flexplate hardware

Built for work trucks. Built for tow rigs. Built for performance.

📞 Call or Text: 802-558-5527
🌐 GoodFellasDiesel.com

Champlain Valley’s Home for Diesel Performance 🇺🇸

One of the most common questions we get is:"What's the cheapest upgrade I can do to help my automatic transmission live ...
06/09/2026

One of the most common questions we get is:

"What's the cheapest upgrade I can do to help my automatic transmission live longer?"

Our answer? A thermal bypass block.

The factory thermal bypass valve on 2013-2024 Cummins trucks can restrict cooler flow, leading to higher transmission temperatures and slower fluid circulation. A thermal bypass block allows full-time flow through the transmission cooler, helping keep fluid temperatures more consistent and reducing heat-related wear.

Whether you have a 68RFE or Aisin AS69RC, this simple upgrade is one of the best bang-for-the-buck modifications you can make for transmission longevity—especially if you tow, haul, or live in a warmer climate.

✔ Lower operating temperatures✔ Improved cooler flow✔ Helps extend fluid life✔ Affordable insurance for your transmission

A small upgrade that can make a big difference.

Goodfelladiesel.com
📱 802-558-5527

The Filter Matters.Not all transmission filters are created equal—especially when it comes to the 68RFE.Many aftermarket...
06/08/2026

The Filter Matters.

Not all transmission filters are created equal—especially when it comes to the 68RFE.

Many aftermarket filters have inconsistent fitment, bypass valve issues, or poor-quality filter media that can affect line pressure, clutch apply rates, and overall transmission performance.

That’s why every 68RFE we build and every 68RFE we service at GoodFellas Diesel receives genuine Mopar transmission filters. No shortcuts. No generic replacements.

When you’ve invested thousands into your transmission, using the correct OEM filter is one of the simplest ways to help ensure proper operation, consistent pressure control, and long-term reliability.

✔ Genuine Mopar filters
✔ Used in every build and service
✔ Proper fit and performance
✔ Peace of mind

GoodFellas Diesel
Champlain Valley’s Home for Diesel Performance
🌐 goodfellasdiesel.com

.CP4 Failure? Don’t Wait Until It’s Too Late.This Alumiduty came in after a catastrophic CP4 failure that contaminated t...
06/07/2026

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CP4 Failure? Don’t Wait Until It’s Too Late.

This Alumiduty came in after a catastrophic CP4 failure that contaminated the entire fuel system.

To get it back on the road, we replaced:

✔ Alliant Power injectors
✔ S&S Diesel Motorsport DCR conversion pump
✔ Fleece Performance Engineering billet fuel filter head
✔ New Bosch fuel rails
✔ New Ford Motorcraft sending unit

The result? A reliable fuel system built to work harder and last longer than the factory setup.

A CP4 failure doesn’t just take out the pump—it can send metal throughout the entire fuel system, turning a simple repair into a major expense.

Protect your 2011-2019 Super Duty before it happens.

The S&S DCR conversion replaces the failure-prone CP4 with a proven DCR pump and can be installed for a fraction of the cost of a complete fuel system replacement after a failure.

Don’t wait for a breakdown to make the upgrade.

📍 GoodFellas Diesel
Champlain Valley’s Home for Diesel Performance
🌐 goodfellasdiesel.com
📞 Call or text today for pricing and scheduling.

Turbo replacement for this 15 Powerstroke recently with a new factory Garrett for this daily driver to keep it going str...
06/06/2026

Turbo replacement for this 15 Powerstroke recently with a new factory Garrett for this daily driver to keep it going strong as day 1.

📱 802-558-5527
Goodfellas diesel.com

Another one of our GFD stock+ 6r140 installed and headed back to work for this F550 along with a 23+ ccv upgrade, and AB...
06/05/2026

Another one of our GFD stock+ 6r140 installed and headed back to work for this F550 along with a 23+ ccv upgrade, and ABS module replacement.

Need a transmission for your 11-19 SuperDuty? 6.7 diesel, 6.2 or 6.8 gas we can get you back on the road with a trans built to work harder and tow longer.

Call/text 802-558-5527
Goodfellasdiesel.com

Well we are officially calling it, we will not be attending UCC / 72Fast race this year after all. With no 6.7 block bac...
06/03/2026

Well we are officially calling it, we will not be attending UCC / 72Fast race this year after all.

With no 6.7 block back from the machine shop still, and being absolutely swamped with work the last few months with record sales and a fast growing transmission program we have decided that given what we have now we would not be competitive by simply throwing it back together with the 300k stock 5.9 and no testing we would only be wasting our time and everyone else's.

We know the 72Fast class isn't just a flash in the pan either and we're still gonna continue building the single cab and be ready for the next one ( hopefully this fall?)

That all being said we hope to pick the block up this week and get the 6.7 motor back and together in the coming weeks , and get this little red wagon back on the road and to some local tracks for shakedown passes soon!

🇺🇸 250 YEARS OF AMERICA SUMMER SALE 🇺🇸Starting Memorial Day • Monday May 25thRunning through July 4th WeekendSAVE $250 O...
05/29/2026

🇺🇸 250 YEARS OF AMERICA SUMMER SALE 🇺🇸
Starting Memorial Day • Monday May 25th
Running through July 4th Weekend

SAVE $250 OFF ANY TRANSMISSION BUILD
At Goodfellas Diesel — The Champlain Valley’s Home for Diesel Performance

Eligible Builds:
✔ 47RE
✔ 48RE
✔ 68RFE
✔ 65RFE
✔ 66RFE
✔ 6R140
✔ 5R110W

🔥 Built & installed in-house using the best parts in the industry
🔥 Performance, towing, street & competition builds available
🔥 Backed by our 1 Year / Unlimited Miles Warranty

Whether you tow heavy, daily drive, or chase big horsepower — now’s the time to upgrade before summer hits full swing.

📞 Call/Text: 802-558-5527
🌐 goodfellasdiesel.com

MORE POWER. MORE RELIABILITY. BUILT TO LAST

Address

3096 NY-22a
Fair Haven, VT
12837

Opening Hours

Monday 8:30am - 5pm
Tuesday 8:30am - 5pm
Wednesday 8:30am - 5pm
Thursday 8:30am - 5pm
Friday 8:30am - 5pm

Telephone

+18025585527

Website

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