What is a Shift Kit?

By Mister Transmission

Today’s customers demand a transmission which shifts smoothly, is durable, and delivers excellent fuel economy all at the same time.

To accomplish these benefits we would install what is known as an automatic transmission shift kit, which is probably one of the most misunderstood upgrades in the automotive world.

Many people know the words, but not many fully understand what a shift kit truly does or why it’s desired. In short, an automatic transmission shift kit modifies the transmission’s shift timing in order to dramatically increase shift firmness and durability of the transmission components.

This is desirable because the automobile manufacturer’s engineers sometimes allow far too much shift overlap (when the transmission is actually in two gears at once) in an effort to increase shift smoothness. It’s this overly smooth, disconnected feeling that earned early automatic transmissions the label “slush box.”

While the extended shift overlap creates a very smooth shift, it also reduces the efficiency and durability of the transmission by making the friction surfaces work overtime. The added friction also creates excessive heat, which prematurely wears out seals and clutches.

Transmission shift kits can reduce this overlap time while improving the overall shifting action. By better utilizing the energy normally turned into heat by slipping during extended overlap, shift kits allow you to instead use that inertial energy for forward motion with quicker shifts, therefore you’re also able to notice improved city fuel economy.

Most vehicle owners are willing to live with the faster shift patterns in exchange for the extended durability and added fuel economy. Plus, the fact that shift kits can be installed in a few hours without removing the transmission from the vehicle makes them a logical upgrade.

We carry a variety of shift kits for most makes and models and would be more than happy to answer any questions you have. However, due to the fact that one misplaced shift valve or spring can result in a malfunctioning or damaged transmission, it’s highly recommended that you allow the experts at Mister Transmission to perform the installation of a shift kit for you. To have a shift kit installed in your vehicle’s transmission, please contact your local Mister Transmission.

Want to know more?
Visite one of our locations!

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Customer Reviews
Best customer service and quick...
Cyndie Moore
Best customer service and quick response time. Had my car back on the road in 3 business days. Ashley is the BEST, she kept me updated on the progress.
Date: March 18, 2024
Website: Google
Excellent service. Brian and other...
Navjot Kaur
Excellent service. Brian and other team members were very helpful. They gave honest advice for my vehicle and I can’t thank them enough for saving my thousands of dollars on repair.
Date: March 16, 2024
Website: Google
Excellent help! Chris had his...
Steve Vandevelde
Excellent help! Chris had his guys test and inspect my transmission for free. Knowing that I preferred to save money by doing as much as possible myself, they gave me all sorts of advice, laying out the pros and cons for my choice. I trust these guys. I recommend this shop.
Date: March 15, 2024
Website: Google
Jamie and the staff went...
DARIN GEAKE
Jamie and the staff went above and beyond to help me get my car fixed. I have a Subaru that was having issues and they spent a lot of time making sure everything was done correctly. Even though they did extra work and got extra parts to make it work, he stuck to his original quote (which btw was almost half of what I was quoted by a different shop). I would recommend Mr. Transmission to anyone!!!
Date: March 15, 2024
Website: Google
Mark and his staff are...
Ryan Rose
Mark and his staff are the BEST!!! Kind, knowledgeable, transparent. Will gladly take any and all of my future business to him and his exceptional team.
Date: March 15, 2024
Website: Google
Amazing customer service! Super friendly!...
Cynicalest T
Amazing customer service! Super friendly! Family owned by mark and son both awesome people!
Date: March 15, 2024
Website: Google
Thank you for the great...
Linda Jones
Thank you for the great service we received at Mister Transmission in Barrie. It was exceptional. They made sure the vehicle was at 100% before they let us pick it up. I would recommend them to anyone that needs transmission repairs. All the employees were pleasant and made you feel important. If you had any questions they answered them right away. Great job everyone. Ted and Linda Jones.
Date: March 14, 2024
Website: Google
Friendly and efficient, you couldn’t...
Dale Allen
Friendly and efficient, you couldn’t ask for much more from a mechanic.
Date: March 14, 2024
Website: Google
Got my car back fast...
Brenda Kane
Got my car back fast , amazing staff. Thanks Mr transmission!!
Date: March 14, 2024
Website: Google
I needed an expensive repair...
Daniel Zwiercan
I needed an expensive repair but the folks at Mister Transmission helped me save money where I could and did a great job. Thank you.
Date: March 14, 2024
Website: Google
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