Guardian Transmissions

Transmission Shops in Marietta, Georgia

4.9 (182)

Category	Transmission Shops · Auto repair shop
Address	2150 Post Oak Tritt Rd, Marietta, GA 30062
Street	Post Oak Tritt Road
Area	Marietta, Georgia
Phone	(770) 509-2140
Google rating	4.9 (182)
Source	Google Maps and public records · listed Oct 20, 2026

Hours

Monday	7 am–4:30 pm
Tuesday	7 am–4:30 pm
Wednesday	7 am–4:30 pm
Thursday	7 am–4:30 pm
Friday	7 am–4:30 pm
Saturday	Closed
Sunday	Closed

About Guardian Transmissions

We are a Family owned and operated Transmission repair and service shop located in East Cobb. Our services include Automatic transmission repair and rebuilds, Manual transmission repairs and rebuild, transfer case and differential repair and rebuild, axle replacements, mounts and fluid services and TSB/Reprogramming services. Our team of experts work on all makes and models. Guardian offers a 2 year 24,000 mile standard warranty on all of our overhaul, and rebuilds. We also offer several different warranty programs to assist with any needs you may have. Call us today or visit our website.

Guardian Transmissions is a transmission shop in Marietta, Georgia. It is listed at 2150 Post Oak Tritt Rd, Marietta, GA 30062, which places it among the local businesses of Marietta that residents and visitors turn to when they need this kind of service close by. Google also lists it under auto repair shop, which is worth knowing if you are comparing several options in the area.

Hours are published for 5 days a week. On most of those days it is open 7 am–4:30 pm. It is closed on Saturday, Sunday. Hours in the United States do change around federal holidays and long weekends, so a quick call before a special trip is sensible. The listed phone number is (770) 509-2140. Many businesses also reply to text messages on the same number if it is a cell phone. Its website is guardiantransmissions.com, where you may find menus, price lists or booking options.

On Google it holds a rating of 4.9 out of 5 from 182 reviews.

How Guardian Transmissions compares with other transmission shops in Marietta

Its 4.9 rating is the highest among the 10 transmission shops in Marietta with at least 20 reviews (one other shares it).
Nearest other transmission shops: Speedy Transmission by CS (2.6 mi), Certified Transmission Repair of Marietta (4.6 mi), Collins Brothers Garage (5.1 mi)

Before you go

Check your vehicle for open safety recalls on NHTSA.gov; recall repairs are free at a franchised dealer.
Ask for a written estimate before work starts and to approve any extra repairs first.
Ask whether technicians are ASE-certified and what warranty covers parts and labor.

Latest Google reviews

The 5 most recent reviews shown on Google Maps. Reviews belong to their authors; read all of them on Google.

Keith Lynch (Keith) 2 months ago

I have had the opportunity to work with Matt a couple of times over the past few months. I can say I was not planning or wanting to end up with transmission issues but I can tell you he and his team did an amazing job of taking care of us. His work was top notch and when there was a follow up he took care of it without a question or concern. This is on top of beating the quote I had in hand from a trusted shop by a sizable margin. I really can’t say enough good things. When it is your transmission you want it in the hands of experts who that is all they do. They did not disappoint me and took care of us completely.

loreal patman 4 months ago

Very grateful to find Guardian Transmissions and trust them with getting my car back mobile. I had clutch and transmission issues but Matt was honest about the best solutions to get me back on the road. The pricing is reasonable and the customer service is top tier! Thank you Matt and Guardian Transmissions!

Wes Blackwell 5 months ago

Guardian Transmissions was recommended to me by East Cobb AAA. I brought my ancient Honda Pilot in for an estimate of repairs since the car would not move in Drive. Not only did Matt give me an estimate but refused to charge for the inspection. I did not go with the repair as it would have been more than the old car was worth, but I am super-impressed with Guardian and they will definitely be getting my business in the future. Thank you for your honesty and integrity, Matt. Wishing your business every success!

Steve Lattizori 5 months ago

Matt and Lance have worked on my 1985 Chevy K10 pickup several times. I have always found their work to be outstanding. They are very knowledgeable and take the time to explain the process. Guardian is the only transmission shop I would recommend.

Joseph Killen 7 months ago

They were quick responding and repairing my transmission. They were upfront with their prices and the military discount is definitely a plus. The only drawback I have is their quote was higher then the Lexus dealership. I would use them again though for the professionalism alone.

All reviews on Google ↗

Frequently asked questions

Where is Guardian Transmissions located?

Guardian Transmissions is at 2150 Post Oak Tritt Rd, Marietta, GA 30062, in Marietta, Georgia. Use the “Open in Google Maps” button on this page for directions.

What kind of business is Guardian Transmissions?

Guardian Transmissions is listed as a transmission shop and is also tagged on Google as auto repair shop.

What are the hours of Guardian Transmissions?

Published hours are Monday: 7 am–4:30 pm; Tuesday: 7 am–4:30 pm; Wednesday: 7 am–4:30 pm; Thursday: 7 am–4:30 pm; Friday: 7 am–4:30 pm; Saturday: Closed; Sunday: Closed. It is closed on Saturday, Sunday. Hours can change on holidays, so call before a special trip.

Is Guardian Transmissions open on Sunday?

No, Guardian Transmissions is closed on Sunday.

What is the phone number of Guardian Transmissions?

You can call Guardian Transmissions at (770) 509-2140.

How is Guardian Transmissions rated on Google?

Guardian Transmissions has a Google rating of 4.9 out of 5 from 182 reviews.

Does Guardian Transmissions have a website?

Yes, the website of Guardian Transmissions is guardiantransmissions.com (linked on this page).