Automotive Automatic Transmission Filter O-Rings And Lip Seals -

Automotive Automatic Transmission Filter O-Rings And Lip Seals

Many transmission filters require a seal at the point where they assemble into the transmission. Most of these seals are called "lip seals," although some filters may use an O-ring.

o-ring-lip-seal-tech-tipsModels: All

Many transmission filters require a seal at the point where they assemble into the transmission. Most of these seals are called “lip seals,” although some filters may use an O-ring.

Before filter installation, it is important to make sure that there is no O-ring or lip seal in the case or pump bore left over from the old filter.

O-rings are placed on the filter tube (as far as they will go) prior to filter installation. Put transmission fluid or lube on the O-ring and assemble the filter tube into the case or pump bore with an upward motion until completely seated.

There are two distinct types of lip seals, and the way in which these are used is entirely different. Installing the lip seal using the wrong procedure can actually cause complete transmission failure in a short time, so it is very important to understand the difference between the two and the proper installation procedure for each.

The first type of seal is a round, ribbed band, which is pressed onto the filter outlet tube as far as it will go. There are stops or flanges on the filter tube where these lip seals are meant to rest. This type of lip seal usually comes assembled to the filter and is always pressed onto the filter tube before the filter is assembled into the transmission.

The other type of lip seal, largely used on General Motors transmissions, is never assembled to the filter tube. It must always be press fit into the transmission first and then the filter inserted into the already installed lip seal. This type of lip seal is shaped somewhat like a hat, as it really does have a lip or flange on one end. Lubricate and then insert this type lip seal into the transmission assembly. It will be an extremely tight fit. Make sure the seal is square to the hole and tap it in carefully. The seal must be fully seated in the hole right up to the lip. Then, using more transmission lube, assemble the filter into the seal with an upward twisting motion. Failure to follow this procedure can damage the rubber end of the seal. Immediate transmission failure will occur if a piece of this rubber seal can get to the pump.

Courtesy of Filter Manufacturers Council.

You May Also Like

BMW Telematics – Has It Really Been 25 Years?

The first step into the connected future took place in 1998 with “BMW Telematics” and the BMW Assist package.

BMW has already put more than 14 million telematic-equipped vehicles on the world’s roads over the past quarter-century. Currently, BMW has more than 2.3 million subscribers worldwide. As time has passed, the connection has changed how many functions on a BMW operate.

The first major foray into the connected future took place in 1998 with “BMW Telematics” and the introduction of the BMW Assist package comprising concierge services, traffic information and intelligent emergency call. BMW claimed that if your airbags went off, your call would be placed first in line when connecting to the police. At that time, the analog telephone was still used for establishing an online connection. Unfortunately, all of these vehicles had an analog cellular phone connection until analog cellular providers phased out analog services in 2008.

SkillsUSA Names First Competitor for WorldSkills 2024

Lily Williams of Jonesboro, AR, named as the official competitor for Car Painting at the 2024 WorldSkills Competition.

Crankshaft Counterweights And Balancing

Imbalance in the engine exhibits vibration and damage. Balancing becomes critical to any engine build.

Check TPMS, Save on Fuel for Your Next Road Trip

Discover the benefits of TPMS for enhancing safety, fuel efficiency and peace of mind during long road trips.

The Impact of Fuel Type on Engine Performance

When choosing the right fuel, consider engine design, manufacturer recommendations and intended usage.

Other Posts

Grinding/Rubbing Noise While Braking At Or Below 10 MPH

Some 2020-2023 Escape hybrid vehicles may exhibit a grinding or rubbing noise while braking at or below 10 mph.

Acura Frozen Starter Causes No Start

Why won’t the engine crank after the vehicle has been exposed to precipitation and then freezing temperatures?

Fine-Tuning Your Wheel Balancing Process

The first step to a smooth ride and well-balanced tire has nothing to do with the balancer.

Drilled and Slotted Rotors

There’s real science behind the location of holes, slots and grooves in today’s brake rotors. Plus, they look great too.