transmission was delivered in a within a week of ordering, was plug and play as far as not needing to take to dealer to code to vin, has been in truck for a few months and havent had any complaints.... See more
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Review summary
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Prior to completing my order, the order system requested all information pertinent to supplying the exact equipment for a turn key repair of my vehicle. The requested info allowed Quantum techs to... See more
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Great price, quick shipping, excellent communication throughout the purchase and core return process, and quick, full refund of core charge. The transmission has been flawless in the over 2,000 miles... See more
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⭐⭐⭐⭐⭐ I highly recommend Quantum Gear! I ordered a transmission from them with very little knowledge about who they were or how the process worked, so I honestly wasn’t sure what to expect.... See more
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Company details
- #9 of 22 best companies in Auto Parts Manufacturer
- #21 of 79 best companies in Auto Parts Store
- #1 of 1 best companies in Transmission Shop
About Quantum Gear
Written by the company
At Quantum Gear, we understand that a failing transmission is stressful — and that trusting someone with a repair this important isn't an easy decision. That's why we focus on doing things the right way, from the first click to the day your unit arrives.
We specialize in remanufactured GM automatic transmissions, with our core lineup built around the 6L80 and 6L90. Every unit goes through a complete remanufacturing process, where worn and failure-prone components are replaced and restored. Before anything ships, each transmission is tested on a dynamometer, so we know it performs the way it should — not just on paper, but under real load.
We ship nationwide. Ordering is done online, and your unit is delivered by freight straight to you, wherever you are in the country.
Whether you're a repair shop, a mechanic, or a driver simply trying to get your vehicle back on the road, our goal is the same: make the process clear and straightforward, and hand you a unit you can rely on. No guesswork, no runaround — just a properly remanufactured transmission and people who are ready to help when you have questions.
Contact info
w177n9856 Rivercrest Dr suite 221, 53022, Germantown, United States
- quantumgear.us
4.7
Excellent
70 reviews
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Great company to buy from!
We are very satisfied with the transmission that was ordered through this company. The buying and shipping process was very easy and we appreciate their service. Highly recommend.
September 1, 2026
Reply from Quantum Gear
Thank you Marjorie! Easy from ordering through shipping is exactly what we aim for. We appreciate the recommendation.
Reply from Quantum Gear
Thanks Jay, glad the service and the shipping both landed well.
Transmission replacement
To start off with, i am a person that likes to talk to a person when dealing with parts, especially when working with major parts, Like transmissions.
Quantum made this effortless, just gave them the year, VIN, and they handled everything from there. From ordering to core return, was simple as could be.
Was easy, and simple, and would do it again.
August 13, 2026
Reply from Quantum Gear
That means a lot, Michael. A transmission is not something you want to order blind, so being able to talk it through and just hand us the year and VIN is exactly how we like to do it. Glad the core return was painless too.
I highly recommend this company
I highly recommend this company for transmissions. We installed one in my 2015 Chevy Silverado 1500 LT Z71 with the help of my dad‘s nephew after installing, took it on a test run within 5 to 10 miles of test driving the transmission was dialed in tight shifting correctly and running better than ever.
September 1, 2026
Reply from Quantum Gear
Running better than ever after a 5 to 10 mile shakedown is a great sign, Edward. Glad the install went smooth with your dad's nephew. Thanks for the recommendation!
The transmission was rebuilt new as…
The transmission was rebuilt new as expected and arrived timely. The only down side is the billing process. Once you order your locked in and then the second bill comes for shipping and core charge. It would be nice if this process was more transparent up front. Just tell people what the all in cost is!
September 1, 2026
Reply from Quantum Gear
Thank you for the honest feedback, Jeff, and glad the unit was right and arrived on time. You are right about the billing, that is how our older system worked. We have since automated it, so the full cost including shipping and the core charge is calculated and shown at checkout up front. No more second bill. Appreciate you pointing it out.
Shipping and all that was great
Shipping and all that was great, but my transmission still down shifts pretty hard, I’ve put 15k miles on the replaced 6l80
September 1, 2026
Reply from Quantum Gear
Thanks for the kind words on the shipping, Bodie. On the hard downshifts, your transmission is under warranty, so no need to worry there. Our manager has already reached out to you, please check your email so we can help get this sorted. It matters to us that you end up happy with the unit.
Reply from Quantum Gear
Thank you Kaitlyn! Delivery, communication and the product itself, that is the whole job. Appreciate you taking a minute to say so.
The whole process was smooth
The whole process was smooth. Received my transmission a week after ordering, and called for pickup of my core within 4 days. Pickup was just as smooth, and I've already received the core return. Highly recommend!
September 1, 2026
Reply from Quantum Gear
A week to your door and the core refund already back in your hands, that is how it should run every time. Thanks Amanda, appreciate the recommendation.
Quantum Gear was easy to work with the…
Quantum Gear was easy to work with the whole way through. The pricing was as good or better than any other rebuilt options available, and they program the transmission before shipping so my car (2013 GMC Yukon XL) started up and drove great right after the installation. They handled the delivery and core return without any issues. Good company to work with.
September 1, 2026
Reply from Quantum Gear
Thank you Jonathan! Glad the pricing worked out and that the Yukon XL fired up and drove great right after the install. Delivery and the core return going without a hitch is what we aim for every time. Good working with you too.
All was well except I did not receive…
All was well except I did not receive my 12qts of tranny fluid.. but.. quantum was quick to reimburse me w my receipt of purchased fluids. I will use quantum in the future!! Good company!! 😁
August 13, 2026
Reply from Quantum Gear
Sorry about the fluids missing on that shipment, Tony, that one is on us. Glad we could get you taken care of quickly on the reimbursement. Appreciate you still giving us a shout out, and we will be here next time.
Worth the money
I bought a 6L80 around a year ago and it runs perfectly, I have had no problems with the transmission and would 100% buy another one from here for the price they were offering.
September 1, 2026
Reply from Quantum Gear
A year in and still running perfectly, that is exactly what we like to hear Eduardo. Thanks a lot, and we will be here when you need another one.
Reply from Quantum Gear
Thanks James, glad the delivery and the tracking were both on point.
Overall satisfaction in entire transaction
Customer service is fast, as well as shipping, both to me and core return back to them. Great product so far.
August 30, 2026
Reply from Quantum Gear
Appreciate it Travis. Fast both ways, out to you and back on the core, is what we work at. Glad the unit is treating you well so far.
Good price so far working good 3 months…
Good price so far working good 3 months and 2500 miles on the transmission no complaints so far
August 13, 2026
Reply from Quantum Gear
Three months and 2,500 miles with no complaints, good to hear Michael. Thanks for circling back with an update.
My 6L90E tranny
The delivery company was awesome, drop off and core pick up was great. My 6L90E transmission pulls strong and runs real smooth. I recommend using Quantum Gear to anyone needing a good transmission. I would definitely use them again and will. Next will be my 4L60E in my 1/2 ton chevy.
August 13, 2026
Reply from Quantum Gear
Love hearing the 6L90E pulls strong and runs smooth. And we will be ready when it is time for the 4L60E in the half ton. Thanks a lot!
The whole process was great with the…
The whole process was great with the exception of one thing. Once the transmission had been installed, we had to get the codes reset. Has been running with no issues since.
Donald Collins
May 13, 2026
Reply from Quantum Gear
Appreciate the honest feedback, Donald. Glad it has been running with no issues since. Thanks for choosing us.
Was the best decision I made to go with…
Was the best decision I made to go with Quantum Gear to get a transmission! Easy simple and they communicate effectively
August 18, 2026
Reply from Quantum Gear
Thank you Tavarse! Easy, simple and clear communication is what we go for. Appreciate you choosing us.
I would just like to say that this…
I would just like to say that this company know what their doing, well built transmission, we have traveled a few thousand miles since install and have towed countless trailers with zero issues and a great warranty is priceless to us!
August 13, 2026
Reply from Quantum Gear
A few thousand miles and countless trailers with zero issues, that is exactly what these are built for. Thanks Richard, and glad the warranty gives you some peace of mind.
Would highly recommend this company
I talked to an individual there to figure out exactly what I needed gave them my information like vin# and what I was wanting out of my new transmission I went with the upgraded transmission for I don't remember a couple hundred more. It arrived at my house on time and beautifully packaged it was preprogrammed so I didn't have to worry about getting it to a shop or buying expensive programming tools like another company I checked into first. I did a road trip after I installed it and did the 500 mile break in which I will say felt weird the computer has to go through a programming process and sometimes it just felt weird but that was 7000 miles ago I have pulled my 3500lb boat through the mountains here in Arkansas numerous times and made a few road trips I am very happy with the product and the company would recommend them
May 18, 2026
Reply from Quantum Gear
Man, appreciate you writing all that out, Jeff. Pulling a 3,500lb boat through the mountains in Arkansas at 7,000 miles is exactly what these are built to do. Really glad we could get you dialed in from the VIN and that it showed up on time. Thanks for recommending us!
AMAZING COMPANY TO WORK WITH
AMAZING COMPANY TO WORK WITH. WE HAVE INSTALLED AT LEAST 10 OF THEIR UNITS WITHOUT ISSUE. QUICK SHIPPING TO GET OUT FLEET CUSTOMERS BACK ON THE ROAD!
August 13, 2026
Reply from Quantum Gear
10+ units and still coming back to us, that means a lot. Keeping your fleet customers rolling is exactly what we want to help with. Appreciate you guys!
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