Transmission Basics: Understanding the Basic Parts

By Mister Transmission

Before you hand over the keys, brush up on the basics of automatic transmissions so you can understand why your transmission is acting up. Here we’ll cover the basic parts of a transmission, basic transmission problems and how to know if a rebuild is in your future.

What is a Transmission?

The transmission allows you to shift your car from gear to gear, knowing how fast you need to go and how quickly you need to get there. Remarkable stuff.

Parts of a Transmission: 101

While there are many little parts inside, your transmission is essentially made up of 4 key parts of systems:

Bell Housing: This is the cone shaped metal case that you can see when you peek underneath your car. If you have a front-wheel-drive car it’s stuck on the side of the engine under the hood. If your car is rear-wheel-drive, the transmission will be mounted underneath the car behind the engine.

Gears: Even though you’re not shifting them, an automatic transmission has gears. They are broken into main gears and planetary gears. You need all of these to be able to drive.

Fluid: Transmission fluid is very important to an automatic transmission. All of the magic happens in the fluid. Most cars come with red transmission fluid, good to know if you are looking for a leak.

Filter: All of that fluid has to be clean for your car to shift gears at the right time. To keep things fresh, your transmission has a filter to catch any gunk.

Transmission Problems: 101

If your car won’t start or doesn’t run smoothly, these problems are caused by the same faults in your transmission, so whichever your car is doing, the following applies:

Is your fluid level correct?

It’s important to check your transmission fluid at least twice a year. Not only can a low fluid level cause your car to shift poorly, it can eventually lead to transmission damage, and a costly repair. If your car seems to be losing fluid on a regular basis, you may have a leak.

Is your transmission leaking?

Checking for leaks isn’t as difficult as it may seem. The transmission is a closed system, so there are only a few places that can spring a leak. Unless it’s been changed to a non-dyed fluid, your car will have red transmission fluid. Here are a few places to check for leaks:

  • At the filler tube base.
  • At the drain hole underneath the transmission.
  • Between the transmission and the engine.
  • At the selector shaft – the rod that connects your gear shift to the transmission.
  • At the speed sensor mounting point: This will either be your cable screwing into the transmission housing or an electronic sensor bolted to the housing.
  • In the radiator: If your car has a transmission cooler, it’s possible that a leak will cause transmission fluid to leak into the radiator fluid. They don’t mix well, so you’ll see it floating around in there.

Is Your Filter Clogged?

Your transmission’s filter is vital to its performance. If you haven’t replaced your filter in a while, or ever, be sure to do this before you start talking about rebuilds or replacements.

Time for a Rebuild?

When your transmission is worn out, you’ll have to have it rebuilt. For some makes and models of car this is true a little too often. The important thing is checking any other possible causes to your problem before you have it taken apart. If you haven’t replaced your filter yet, start there as this fixes a good percentage of transmission problems. If your filter is in good condition and nothing simple is out of adjustment, it’s likely you’ll need a rebuild. The good news is that at Mister Transmission we offer a rebuild warrantee so you’ll know it will get fixed and stay fixed.

Generally, transmission problems can’t be fixed by the average do-it-yourselfer. There are just too many specialized and expensive tools and pieces of equipment needed. We recommend keeping up with your regular maintenance to keep you out of the shop as much as possible.

Want to know more?
Visit one of our locations

image-reviews image-reviews
Customer Reviews
Excellent services!! Hands down recommend!!!
Melissa Lilley
Excellent services!! Hands down recommend!!!
Date: April 27, 2024
Website: Google
I was treated great and...
Stephen Rigney
I was treated great and given a firm and fair estimate They were sympathetic to fact I recently purchased my vehicle and it had very serious issues hidden by the seller and worked to fit my budget . They did a very good job and I will use them not only for further repairs but for servicing my new transmission on a ongoing basis
Date: April 26, 2024
Website: Google
Mr Transmission Maple Ridge was...
Tim Chartier
Mr Transmission Maple Ridge was a great experience dealing with in getting my sons car fixed. They were quick to get the parts and install. Easy to deal with and great communication. I definitely recommend
Date: April 26, 2024
Website: Google
I’ve been a customer for...
Lucien Ledoux
I’ve been a customer for well over ten years now, and the service is second to none. Mister Transmission on Pembina Highway is the only place I take my vehicles for both regular maintenance, and repairs. Everything from scheduled oil changes to an entire engine replacement. Blair, Neil and their team are the most professional, knowledgeable, dependable technicians in Winnipeg. What sets them apart the most is their willingness to work with you throughout the process. They explain to you what is happening to your vehicle and provide you with affordable options on how to move forward. They genuinely care about your vehicle, something that is a refreshing change in a time where vehicles have become disposable. They provide you with peace of mind knowing that the work is done, and done right. Great work gentlemen, don’t ever change!
Date: April 25, 2024
Website: Google
For your transmission expertise, there...
YOUTAG GROUP
For your transmission expertise, there no other spot I would go to other than Mister Transmission. The name says it all. Quick service, professional, competent, and overall excellent service. 2 locations in Ottawa, 34 locations Canada. Bank street location right across the Mayfair Theatre. Thanks Noah and staff @ceochikko
Date: April 25, 2024
Website: Google
Mark, Tyler, Branden, and the...
Chelsea Bechard
Mark, Tyler, Branden, and the guys here are absolutely amazing!!! They made my brake service absolutely seamless. They are incredibly nice, honest and professional. Thank you for taking care of my vehicle and allowing me to trust you in this process.
Date: April 24, 2024
Website: Google
The best service I’ve had...
Andrew Sengsavang
The best service I’ve had for a car. Jason was really helpful and transparent. Highly recommend.
Date: April 24, 2024
Website: Google
I had the best experience...
Livia Passarelli
I had the best experience with Mister Transmission. Cam was so respectful, patient and kind. He took the time to walk me through what he thought was happening, to listen and work through my questions and theories. He was so knowledgeable, and extremely efficient (organized my car getting towed to their shop, and had my car ready for me in less than 24h). I can't imagine service getting any better than this. 10/10 recommend coming to this team.
Date: April 24, 2024
Website: Google
Thank you for everything! I...
Stephanie Brogden
Thank you for everything! I appreciate everything your team did to get my vehicle back on the road,
Date: April 24, 2024
Website: Google
Both the men, on the...
Jan Hambleton
Both the men, on the front desk, Trevor, and Cam, were honest and friendly, but not pushy about giving me the options, to fix my car. I appreciated the phone calls , and the prompt services, to get me safely back on the road.
Date: April 24, 2024
Website: Google
Featured Services
Transmission Repair

The evolution of transmissions has made these machines and systems increasingly complex. When transmission repairs are required, determining the cause and cure for what ails can be tricky.

Read More
Transmission Technology

At Mister Transmission we have access to leading-edge diagnostic equipment, enabling us to offer you the fastest and most accurate findings about what’s going on inside your vehicle’s transmission.

Read More
Transmission Maintenance & Service

Just as you have other parts of your car serviced, your transmission needs maintenance to ensure a long life and avoid transmission problems.

Read More
Recent Blogs
Saving On Your Ford Transmission Replace...
When it comes to maintaining your Ford, understanding the intricacies of transmission
Read More
April 22, 2024
5 Signs It’s Time For A Transmissi...
Maintaining your vehicle's transmission is crucial for its longevity and performance.
Read More
April 12, 2024
Prevent Automatic Transmission Slipping:...
Automatic transmission slipping is more than just an inconvenience; it can signal
Read More
April 5, 2024
CVT Transmission Repair Simplified: Expe...
Continuously Variable Transmissions (CVT) are known for their smooth, seamless
Read More
March 29, 2024
The Essential Guide To Cooling Transmiss...
For any vehicle, the health of its transmission system is paramount. One key aspect
Read More
March 22, 2024
The Role Of Solenoids In Your Transmissi...
In the intricate world of automotive transmissions, solenoids are fundamental
Read More
March 14, 2024
Transmission Shop Near Me: Ensuring Your...
When it comes to vehicle maintenance, the transmission is a critical component,
Read More
March 7, 2024
How A Timely Transmission Fluid Change C...
In the world of automotive maintenance, the importance of a timely transmission fluid
Read More
February 23, 2024
Rebuild Transmission: A Cost-Effective S...
In the complex world of automotive repairs, transmission issues can be among the most
Read More
February 16, 2024
The Journey To Becoming A Leading Transm...
In the dynamic world of automotive repair, the rise to prominence of a transmission
Read More
February 9, 2024