Muldoon's Performance Transmissions

Muldoon's Performance Transmissions Performance oriented Dodge diesel transmission & components.
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Hey everyone! We are looking to fulfill a sales/ media position at the shop! Interested? Send your resume to info@muldoo...
01/05/2026

Hey everyone! We are looking to fulfill a sales/ media position at the shop!

Interested?

Send your resume to [email protected]

11/23/2025

Our Black Friday Sale Is Now Live!
Take advantage of these limited-time savings before December 2nd.

• 10% off all valve bodies
• 5% off all parts
• Current transmission pricing locked in through 2025 — prices will increase significantly in 2026.

Don’t miss out on the best pricing of the year. Secure your components and builds while discounts and current rates are still available.

For over 13 years, we’ve believed that doing the right thing isn’t just good business — it’s the only way to do business...
10/27/2025

For over 13 years, we’ve believed that doing the right thing isn’t just good business — it’s the only way to do business. At Muldoon’s Performance Transmissions, our goal has always been simple: make sure every customer leaves 100% satisfied, no matter what it takes.

Sometimes that’s meant long nights in the shop. Other times, it’s meant packing an overdrive housing in the trunk and driving all the way to New York to install it in a customer’s driveway — because doing the right thing doesn’t stop at the state line.

Today, we’re incredibly proud and grateful to celebrate 100 five-star Google reviews. Each one of those stars represents trust, loyalty, and the relationships we’ve built along the way. From our family to yours — thank you for your support, your confidence, and for being part of this journey with us.

Here’s to the next chapter of excellence, integrity, and horsepower! 💪🚗⚙️

— The Muldoon’s Performance Transmissions Team

It’s not often we provide a job opening, but if you can man handle a tr**ny in a tight space, we may just have what you’...
08/05/2025

It’s not often we provide a job opening, but if you can man handle a tr**ny in a tight space, we may just have what you’re looking for.

Some details on what we’re looking for;
An experienced mechanic to join our team that loves a job well done. Primary duties are transmission removal and installation, transmission & valve body teardowns, transmission line installation, transmission cooler replacement, vehicle test drive duties and simple electrical configuration/ diagnostics.

What you’re getting into;
4 day work week - because there’s more to life than work and we understand that.
Air conditioned shop - say goodbye to batwings.
401K Plan with match - because we’re looking out for your future.
Health insurance benefit - nobody should be without it.
A workplace where we always go the extra mile - Because these aren’t just customer’s trucks, they’re instruments to livelihood, passion and memories.

from SunCoast Performance stopped by for a tour and to talk shop on this fine September day. We conversed a multitude o...
09/17/2024

from SunCoast Performance stopped by for a tour and to talk shop on this fine September day. We conversed a multitude of subjects from the past, present and future. Our discussion was full of energy and industry terminology. It’s a rare occurrence for me to meet someone that’s multi faceted like Montana is. We covered transmission dynos, industry challenges, 10LS, transbrakes, Ernie, and a whole lot of classifieds.

Thanks for stopping by buddy, I appreciate your time from today.

My little valve body minion stopped by the shop today to pay me a visit. Too cool.
08/21/2024

My little valve body minion stopped by the shop today to pay me a visit. Too cool.

How it started versus how it’s going My shop truck got a lot of mechanical and cosmetic tlc over the past 6 months. ...
08/01/2024

How it started versus how it’s going

My shop truck got a lot of mechanical and cosmetic tlc over the past 6 months.

I’m excited to say I just won this transmission dyno on eBay. I can’t wait to get this thing into the shop so I can do e...
07/28/2024

I’m excited to say I just won this transmission dyno on eBay. I can’t wait to get this thing into the shop so I can do even more r and d on our units! Not to mention once it’s up and running, we’ll dyno check every ship out unit. It will be a process getting it up and running, but once it is configured it’s one more step in the quality control process.

Big congratulations to Kenny Bruner Adam Aquino for the WIN at UCC. Also, Chris Patterson @ Unrivaled Diesel put down 30...
06/03/2024

Big congratulations to Kenny Bruner Adam Aquino for the WIN at UCC. Also, Chris Patterson @ Unrivaled Diesel put down 3000 horsepower on the Superflow dyno which is AMAZING.

My buddy Adam built the 48 in Kenny’s truck and Chris built his 48. Both trucks were running my manual valve body. I love seeing the WINNING results AND BIG numbers with our parts.

So proud of everyone involved with these achievements.

Keep up the awesome work guys!

Address

610 South Street
New Castle, DE
19720

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+13022762882

Website

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