Muldoon's Performance Transmissions
“After I sent them a measurement, they came to my house with new parts, crawled under my truck, and rectified the issue.”
Best Car Tune-Up in New Castle, DE
15 technicians listed · 9 in New Castle · 2 open weekends · 12 rated 4.5+
Data verified October 16, 2026
Race Proven Motorsports
“From start-up, to idle, to cooling fans setting, to drive ability and WOT performance is a night and day difference.”
Dj's Automotive
“I dropped my Suburban off on Monday before Thanksgiving and Dave called the day after Thanksgiving and said it was done.”
First State Fleet Service
“Always a pleasure to do business with wether it is my fleet or my personal vehicles.”
S & W Auto Repair
“Price very reasonable, fast reliable service, and loved the fact that I met my 1st female mechanic.”
Tire Sales & Service
“Friendly staff, seem to be priced well.”
Listed for drivers in and around New Castle, DE, these 15 shops handle tune-up work and running faults. What each one says about diagnostics, warranties and service specials comes from its own website; ratings and quotes come from public reviews.
Area overview: New Castle, DE
Of the 15 technicians we list here, 9 are in New Castle itself and 6 come from Wilmington (4, 5 mi) and Newark (2, 10 mi). The technicians on this page are rated from 3.9 to 5.0 across 2,725 reviews; 9 have 50 or more reviews and 12 are rated 4.5 or higher. When customers rate these technicians on specific qualities, they most often praise professionalism (90%), quality (81%) and value (62%). 2 are open on Saturdays. 3 list staff certifications (ASE) and 9 have a BBB rating of A or A+. Domain records put 6 websites of the technicians on this page at ten or more years old; the oldest dates from 2000. 2 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 9 of the technicians on this page; 5 publish a contact page; 7 list a public email and 1 takes bookings online. We count these figures across the technicians on this page; distances are straight-line, and hours and prices change, so confirm the details with the technician before you visit.
Which shops listed for New Castle open on Saturdays or Sundays?
2 of the 15 shops here show Saturday or Sunday hours. Plugs and filters fit neatly into a Saturday. A chase for an intermittent misfire does not, since it can need the car overnight to catch the fault happening from cold.
Anthony's Automotive Towing & Recovery
“Amazing shop , Great Prices , and quality work !!”
Quality Enterprises LLC
“Not only will he walk you through what he did to determine the problem you will also walk you through the solution and provide the various options that may be available to you.”
Aarons Auto Services
Everest Auto Repair
“Was expecting to pay, but they removed broken part as requested and CHARGED NOTHING.”
Certified Automotive
“Gave the ok for repairs at 1:30 PM and was picking the car up at 3:45 PM with all work completed with professionalism.”
J-Tune Performance
“Alittle pricey compared to previous spring installs on other vehicles Ive had, but this car IS different, and price still seems reasonable compared to online quotes ive seen for others Teslas.”
European Performance
“They were highly recommended by a coworker and my tire pressure kept getting lower - despite being busy, they looked at it and fixed it and I was able to make it to work on time.”
Kirkwood Auto Center
“I love taking my car to Kirkwood Auto Center the people there are honest and caring.”
Milenio Auto Group
“They will advise you how to get it fixed, regardless if they make less money on the project.”
Why these companies made our list
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