How to Install Transmission Mounts
Your car's transmission mount is the one responsible for isolating the transmission from the passenger compartment. It may be just a small component but it can greatly affect a car's performance when it gets worn and its rubbers get old and brittle. Faulty transmission mounts can result to shifting problems because of the transmission's misalignment with the chassis. If you think your transmission mount needs a replacement, here's a helpful guide on how to install it yourself:
Required skill level: Intermediate
Needed tools and materials
- Jack stands
- Ratchet set
- Penetrating oil
- New transmission mounts
Preparing for the task
Before installing new a new transmission mount on your car, make sure that everything is all set and secure. First, raise your car's front end from the ground using a jack and use four jack stands to support it. For the height reference, make sure that you have raised your car within 1/2 inch of the transmissions' height or the oil pan from the floor. After that, you can now go under your car and look for the transmission mount.
Removing the old transmission mount
Slightly raise the transmission by sliding the jack underneath then soak the bolts in penetrating oil. To access the transmission bolts, remove both pipes at the transmission unions so that the exhaust pipes are spread apart. Next, remove both bolts that attach the spring support bottom to the transmission by using a ratchet set. After that, you can now pull the old transmission mount out from between the metal beam and the transmission.
Installing the new transmission mount
Once you have removed the old and worn mount, you can now insert the new transmission mount in the same spot where you removed the old one, between the metal beam and the transmission. Tighten all the bolts using the ratchet set then raise your car with the jack to remove the jack stands and finally, lower it back to the ground.
Tips and warnings
- Before removing the four-perimeter screws, make sure that the transmission mount is supported by a floor jack.
- Don't forget to check if the transmission crossmember has cracks or damages at the slotted hole areas. If you see signs of damage, replace or repair the crossmember first before installing the new mount.
Transmission Mount Buyer's Guide
- Transmission mounts protect the drivetrain and help make every ride pleasant.
- A typical vehicle will have two or more transmission mounts. Each transmission mount consists of the mount and its bracket.
- Common causes for a bad or failing mount include oxidation, vibrations, wrong handling of the engine and transmission assembly, and damage from collisions and car accidents.
- Warning signs of a bad mount include increased vibrations, loud noises, problems with shifting gears, and flexing in the chassis.
- When searching for a replacement transmission mount, examine the bracket’s material and the way the bushing joins it.
- You can get replacement transmission mounts at CarParts.com for price tags that range anywhere between $1 and $533.
Your vehicle’s transmission rests upon sturdy mounts that bear its weight, muffles the noises made by the drivetrain component, and keeps its vibrations under control. These transmission mounts protect the drivetrain and help make every ride pleasant.
When one of the mounts fails, you will hear and feel the unpleasant changes while you drive. Track down the bad transmission mount and replace it as soon as possible to prevent more serious problems in your car’s drivetrain.
What is a transmission mount?
Most cars and trucks use multiple mounts to support the various parts that comprise their drivetrain. The mounts keep the noisy and vibration-prone drivetrain isolated from the chassis.
A typical vehicle will have two or more transmission mounts. Each transmission mount consists of the mount and its bracket.
The mount is a bushing made from either rubber or urethane. These flexible materials absorb the vibrations produced by the transmission while you drive the vehicle. The mount muffles the noise and prevents the vibrations from reaching the vehicle’s cabin.
Bolts, lamination, or welds keep the bushing attached to the bracket. Made of steel or a similarly strong material, the bracket secures the transmission to the vehicle.
Possible reasons for bad transmission mounts
On average, a transmission mount will last anywhere between 60,000 to 100,00 miles. Depending on factors like the quality of their materials and the extent of their exposure to air and vibrations, they can exceed the latter mileage.
Like most car parts, a transmission mount will break down with heavy use. Common causes for a bad or failing mount include:
- Exposure to the air causes oxidation, which breaks down the rubber or urethane in the bushing.
- Strong vibrations from the running engine can loosen the bracket from the chassis or create fractures in the steel. The bracket can shatter along the weak point.
- Wrong handling of the engine and transmission assembly when you remove the drivetrain parts for repair or replacement can damage the mounts.
- Damage caused to the vehicle’s front end during a collision or car accident can apply enough shock to the mounting to ruin it.
Bad transmission mount symptoms
You will quickly know when a transmission mount in your car or truck breaks down. Warning signs of a bad mount include increased vibrations, loud noises, problems with shifting gears, and flexing in the chassis.
A running engine produces vibrations that travel through the vehicle. Usually, drivetrain mounts cancel out the shaking, with transmission mounts performing this role in the transmission.
However, a faulty mount lets the vibrations reach the car’s interior. The shaking can increase in intensity until it becomes intolerable for you and your passengers.
Loud noises from the transmission
Mounts keep the transmission in its proper place. When the support starts to give out, the transmission can move from side to side.
The transmission won’t fall out of your car, but its movements slam its metal parts together. The impacts make banging, bashing, and clanking noises that can tell you the location of the bad transmission mount.
You will hear different noises if you drive the car over speed bumps or on rough road surfaces. The transmission shifts vertically and makes thumping sounds.
Problems with the gear
A bad transmission mount can make it harder to get into gear or to shift gears. The loose transmission disrupts the gearbox’s proper operation and can even damage it.
As the transmission changes position, it also shifts weight. The vehicle’s chassis can flex in response. Excessive flexing can lead to distorted frameworks and misaligned doors.
What happens when you ignore a bad transmission mount?
The transmission mount may seem simple and small compared to the rest of the transmission. But its role as a support and connector between the transmission and the vehicle’s chassis makes it more important than its size.
If you leave the broken transmission mount alone for whatever reason, your vehicle can develop the following issues:
- The area where the transmission mount connects to the chassis wears out faster.
- The vibrations spread to the axles, driveshaft, and other critical components that comprise the drivetrain, causing those parts to break down earlier than designed.
- Other transmission mounts will wear out faster since the vibrations from the broken mount reach and affect them. The engine mounts and other mounts in the drivetrain will also develop issues faster, and the parts they support will wear out alongside them.
- The increased moment in the drivetrain wears out transmission lines, making it likelier for the parts to break.
What to look for in a replacement transmission mount
When searching for a replacement transmission mount, examine the bracket’s material and the way the bushing joins it.
An excellent bracket uses high-strength steel that can handle the constant strong vibrations of the transmission. Its partner bushing connects to it via the lamination process.
In most transmission mounts, the bushing and the bracket form an inseparable device. You cannot repair or replace either part. Whether the bushing or the bracket breaks first, you will have to replace the entire mount.
How much does a new transmission mount cost?
Worried about your car’s transmission mounts after experiencing the symptoms of bad or failing units? You can get replacements at CarParts.com for price tags that range anywhere between $1 and $533. The mounts come in single pieces, sets of 2, or as part of a kit.
To quickly track down the right transmission mount for your vehicle, enter your vehicle’s year, make, and model into the filter bar. You can further winnow the options down by brand, location, and series.
Transmission mount replacement
You enjoy a noiseless and smooth ride thanks to the mounts that support the transmission and other drivetrain parts. When the bushing or bracket of a transmission mount breaks, you will quickly feel the unsuppressed vibrations from the flexing part and may find it harder to shift gears.
If you suspect a bad transmission mount, bring your vehicle to a reliable auto repair shop as soon as possible. Only a trained technician or a driver with plenty of experience in DIY car repairs should perform a transmission mount replacement job since lifting the drivetrain parts in the wrong way can damage the other mounts.
DEA vs. Energy Suspension: Which Brand Will Triumph the Transmission Mount Showdown
Every vehicle needs a reliable transmission mount to keep the transmission in place. Because the mount is responsible for limiting the movements of the transmission and reducing noise and vibration under the vehicle's hood, stability and durability must be the top considerations in looking for the perfect transmission mount replacement. DEA and Energy Suspension are two of the most trusted brands when it comes to transmission and motor mounts. They both promise to deliver optimum stability and durability plus a long list of other perks and features. To make the decision-making easier, here is a summarized comparison of the two brands:
DEA Products Inc. has a wide range of transmission and motor mount products for both automatic and manual transmissions. They also offer the regular type of transmission mount with metal plates and a rubber block as well as the hydraulic-type transmission mount that uses hydraulic fluid in dampening the movements of the transmission instead of the rubber block. However, DEA transmission mounts are only available in black finish. The transmission mounts from Energy Suspension, on the other hand, are made from special performance polyurethane, which is developed through the HYPER-FLEX technology of the brand. Although Energy Suspension has only one material composition option, they offer more choices in terms mount color and finish. Their transmission mounts are available in two colors, which are black or red, and you can also choose between zinc or chrome for the metal plating finish.
WINNER: DEA and Energy Suspension
Ease of installation
Energy Suspension's transmission mounts are direct-fit replacement units. This means that their transmission mounts can be installed easily without the need for extreme product modifications. The same goes for the transmission mount replacements sold by DEA Products Inc. They offer OE replacement mounts, which also guarantee perfect fit and easy installation.
WINNER: DEA and Energy Suspension
With a price range of less than $50 to $100, the transmission mount replacement units offered by Energy Suspension are definitely cheaper than DEA Product Inc.'s mounts with price tags ranging from less than $50 to $250.
WINNER: Energy Suspension
Transmission mounts manufactured by DEA Products Inc. carries a 12-month or 12,000-mile warranty. This warranty period is obviously shorter compared to Energy Suspension's two-year limited warranty.
WINNER: Energy Suspension
Energy Suspension and DEA Products Inc. each has its own advantages and disadvantages. But in terms of performance and quality, both brands will surely not disappoint. Although Energy Suspension is the obvious victor in terms of warranty period and price, the decision will still boil down to whether which criterion matters most to you as a buyer.
Purchasing a Transmission Mount? 3 Pointers to Follow
The transmission mounts are just one of the small parts that comprise the powertrain of the modern automobile, but its contribution is enormous. Transmission mounts are designed to hold the transmission in place underneath the vehicle, and at the same time cushion it from shock and vibrations while driving.
It is inevitable for transmission mounts to deteriorate over time. And when they do occur in your car, here are some buying tips to consider:
One of the factors you need to consider when buying a transmission mount is the material that the mount is made of. Transmission mounts are usually made up of either steel or rubber materials, with the steel used for its strength and durability and rubber for its cushioning and insulating properties. Some mounts also have plastic parts integrated into them, while some mounts use a combination of these two or three materials.
While steel, rubber, and plastic have their own respective strengths, they also have their own weaknesses to contend with. And this is why we recommend buying mounts that make use of these different materials. A transmission mount with a steel body but with rubber inserts or padding, for example, has the benefits of strength and cushioning inherent to these materials.
Synthetic rubber vs. natural rubber
You may encounter sellers that tout their transmission mounts as being made of natural rubber rather than synthetic rubber. But unless you're a big fan of organic products, there's no real benefit natural rubber has over synthetic in terms of performance or longevity. And finding a transmission mount that's made of 100% natural rubber may prove to be rare and expensive, as a huge percentage of rubber used in automotive components are synthetic.
Many transmission mounts sold today are sold as a kit, meaning that they also come with bolts and other hardware. We find this to be a better deal than buying a mount without the hardware included, even if the former tends to have a higher price tag. Although you can reuse the bolts from your old mounts, they may no longer be as structurally sound as a new bolt and may wear out soon. What's more, the bolts that are included with the mount may prove to have a better fit compared to the old ones that you have.
8 Steps to Installing a New Transmission Mount in Your Car
One of several mounts found in the modern automobile, the transmission mount helps keep the transmission in place and absorb the vibrations coming from the road. These mounts will start to deteriorate from age and mileage, so it's not surprising that at least one of them will break or collapse during the lifetime of your vehicle.
Once any or all of the transmission mounts break, they must be replaced immediately. You can have the mounts replaced by a mechanic, although if you have the skill and equipment on hand you can do it yourself and save money. To that end, the following is a step-by-step guide to installing transmission mounts.
Difficulty Level: Moderate
- Floor jack
- Wrench and socket set
- Replacement transmission mounts
Step 1: Secure your vehicle. Park the car on a level surface so that it doesn't lean or roll when raised. We also recommend putting chocks behind the wheels for added safety.
Step 2: Raise the vehicle with the floor jack. Make sure to place the jack on the pinch weld or designated jacking points of the car frame. Once the car is raised, place jack stands on the frame and remove the jack.
Step 3: Support the transmission with the floor jack and a block of wood. Place the wood block in between the jack and the engine to avoid damaging both parts. Take note that the jack should only help support the weight of the transmission and not raise it.
Step 4: Remove the bolts that hold the cross member to the transmission mount and the car frame. Once the bolts are off, remove the cross member altogether.
Step 5: Disconnect the transmission mounts from the transmission. Make sure that the transmission rests evenly on the jack.
Step 6: Slide in the new mounts and tighten the bolts according to manufacturer specifications.
Step 7: Attach the cross member to the transmission mount and then to the frame. Make sure its bolts are tightened according to manufacturer specs as well. Once the cross member is secure, remove the jack stand.
Step 8: Lower the vehicle to the ground and conduct a road test. Take note of vibrations or noise from the transmission mount; if there aren't any, the installation was done correctly.