Muldoon's Performance Transmissions
“I called them and they squeezed me in and got my truck done before the time he said.”
Best Transmission Fluid Change & Flush in New Castle, DE
15 experts listed · 4 in New Castle · 2 open weekends · 14 rated 4.5+
Data verified October 16, 2026
Cottman Transmission and Total Auto Care
“Awesome shop, took my Cummins there for service and I would highly recommend.”
Dj's Automotive
“The shop diagnosed the issue in my 2001 s-10, took care of it, at a very fair price.”
Power Trans Inc
JV Auto Service
“Personable, friendly and experienced staff, have worked in and maintained my last two vehicles and have always been timely yet thorough.”
Integrity Auto Repair
“My car (2007 model) is in good working condition simply because of the work done by Integrity.”
Listed for drivers in and around New Castle, DE, these 15 shops change and flush transmission fluid. What each one says about fluid brands, filters and pricing comes from its own website; ratings and quotes come from public reviews.
Area overview: New Castle, DE
4 of the 15 experts we list are based in New Castle; the other 11 serve New Castle from Wilmington (5 mi), Newark (10 mi) and Bear (8 mi). The experts on this page are rated from 4.4 to 5.0 across 4,115 reviews; 13 have 50 or more reviews and 14 are rated 4.5 or higher. When customers rate these experts on specific qualities, they most often praise professionalism (91%), quality (77%) and value (70%). 2 are open on Saturdays. 4 list staff certifications (ASE) and 13 have a BBB rating of A or A+. Domain records put 14 websites of the experts on this page at ten or more years old; the oldest dates from 1996. 3 offer financing; 2 give free estimates; 3 are family- or locally-owned and 8 list coupons or special offers. We have a website on file for 14 of the experts on this page; 11 publish a contact page; 9 list a public email and 8 take bookings online. We count these figures across the experts on this page; distances are straight-line, and hours and prices change, so confirm the details with the expert before you visit.
Can I book a fluid change online with shops listed for New Castle?
An online booking link appears for 8 of the 15 shops. Give them the year, make and model when you book, because the fluid has to be on the shelf and some specifications are ordered in rather than stocked.
Everest Auto Repair
“They're honest and were timely and very professional, kept me informed every step of the way to give me info about findings.”
Sports Car Tire
“I decided to get new tires there and the price was better than online prices.”
Brandywine Auto Repair
“I have been going here for decades and I am always satisfied with their work and atmosphere.”
Certified Automotive
“These guys go above and beyond, have fair prices and most of all work hard to make sure your vehicle keeps working.”
Paul Campanella's Auto & Tire Center Pike Creek
“They perform a diagnostics and I moved forward with the best option and so far my car is still in great condition and running smoothly after my repair.”
J-Tune Performance
“Had an amazing experience here , would definitely recommend to family and friends and will be returning soon amazing work .”
Benchmark Transmission & Auto Care
“I have had my cars transmissions serviced and repaired here over the years and the owner Dante is always upfront and honest in what is needed.”
Penny Hill Service and Repair Center
“Quick to answer phone and very accomodating.”
Kirkwood Auto Center
“One of the most easy going, humble; made you “feel at home” professional gentleman I've encountered first hand working in the automotive industry myself now over eleven years.”
Why these companies made our list
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