Wheel Drive Shafts Description and Operation. Buick Terraza Ext. 2005

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2005 🢒 Terraza Ext. 🢒 Driveline/Axle 🢒 Wheel Drive Shafts 🢒 Wheel Drive Shafts Description and Operation

Wheel Drive Shafts Description and Operation M15, M76

Front wheel drive axles are flexible assemblies.

Front wheel drive axles consist of the following components:

•	A front wheel drive shaft inner tri-pot joint.

•	A front wheel drive shaft outer constant velocity joint.

•	A front wheel drive shaft bar.

The front wheel drive shaft bar connects the front wheel drive shaft tri-pot joint and the front wheel drive shaft constant velocity joint.

The front wheel drive shaft tri-pot joint is completely flexible axially and laterally.

The front wheel drive shaft constant velocity joint is flexible axially.

Seals And Clamps

The front wheel drive shaft constant velocity joint and the front wheel drive shaft tri-pot joint seals in the front wheel drive axle are made of a thermoplastic material.

The clamps on front wheel drive axle seals are made of stainless steel.

The seals provide the following functions:

•	Protection of the internal parts of the front wheel drive shaft constant velocity joint and the front wheel drive shaft tri-pot joint.

The seals protect the grease from the following sources of damage:

-	Harmful atmospheric conditions, such as extreme temperatures or ozone gas.

-	Foreign material, such as dirt or water.

•	Allows the angular and the axial movement of the front wheel drive shaft tri-pot joint.

•	Allows angular movement of the front wheel drive shaft constant velocity joint.

Important: Protect the seals from sharp tools and from the sharp edges of the surrounding components.

Any damage to the seals or the clamps will result in leakage. Leakage will allow water to leak into the front wheel drive shaft tri-pot joint and the front wheel drive shaft constant velocity joint. Damage will also allow grease to leak out of the front wheel drive shaft tri-pot joints and the front wheel drive shaft constant velocity joints.

Leakage may cause noisy front wheel drive axle operation and eventual failure of the internal components.

The clamps provide a leak proof connection for the front wheel drive shaft tri-pot joint and the front wheel drive shaft constant velocity joint at the following locations:

•	The housing.

•	The front wheel drive shaft bar.

The thermoplastic material performs well under normal conditions and normal operation. However, the material is not strong enough to withstand the following conditions:

•	Abusive handling.

•	Damage from sharp objects, such as tools or sharp edges of the surrounding vehicle components.

Front Wheel Drive Shaft Tri-pot Joint

The front wheel drive shaft tri-pot joint is made without an over-extension limitation retainer.

The joint is constructed as follows:

•	The left front wheel drive axle has a female spline. The female spline installs over a stub shaft that protrudes from the transaxle.

•	The right front wheel drive axle has a male spline. The right front wheel drive axle uses a barrel-type retaining ring in order to interlock with the transaxle gears.

Front Wheel Drive Shaft Constant Velocity Joint

The front wheel drive shaft constant velocity joint is of the Rzeppa joint design.

The shaft end, which mates with the knuckle/hub, has a helical spline. The helical spline ensures a tight, press-type fit.

This design prevents end play between the hub bearing and the front wheel drive axle.

Wheel Drive Shafts Description and Operation M76

The rear wheel drive axles are flexible assemblies.

The rear wheel drive axles consist of the following components:

•	2 wheel drive inner and outer shaft tri-pot joints.

•	A wheel drive shaft bar.

The wheel drive shaft batr connects the wheel drive shaft tri-pot joints.

The wheel drive shaft tri-pot joints are completely flexible. Both wheel drive shaft tri-pot joints can move in and out.

Seals And Clamps

The rear wheel drive shaft tri-pot joint seals on the wheel drive axle are made of a thermoplastic material.

The clamps on the rear wheel drive axle seals are made of stainless steel.

The seals provide the following functions:

•	Protection of the internal parts of the wheel drive shaft tri-pot joints.

The seals protect the grease from the following sources of damage:

-	Harmful atmospheric conditions, such as extreme temperatures or ozone gas.

-	Foreign material, such as dirt or water.

•	Allows the angular and the axial movement of the rear wheel drive shaft tri-pot joints.

Important: Protect the seals from sharp tools and from the sharp edges of the surrounding components.

Any damage to the seals or the clamps will result in leakage. Leakage will allow water to leak into the rear wheel drive shaft tri-pot joints. Damage will also allow grease to leak out of the wheel drive shaft tri-pot joints.

Leakage and the loss to grease may cause noisy wheel drive shaft tri-pot operation and eventual failure of the internal components.

The clamps provide a leak proof connection for the wheel drive shaft tri-pot joints at the following locations:

•	The tri-pot housing.

•	The wheel drive shaft bar.

The thermoplastic material performs well under normal conditions and normal operation. However, the material is not strong enough to withstand the following conditions:

•	Abusive handling.

•	Damage from sharp objects, such as tools or sharp edges of the surrounding vehicle components.

Rear Wheel Drive Shaft Tri-pot Joints

The rear wheel drive shaft tri-pot joints are made without an over-extension limitation retainer. Care must be exercised when removing and installing the rear wheel drive shafts in order not to over-extend the tri-pot joints. Damage and tri-pot failure may result.

The joint is constructed as follows:

•	The wheel drive axle has a female spline. The female spline installs over an axle shaft that protrudes from the rear differential.

•	The wheel drive axle utilizes a barrel-type retaining ring in order to positively secure the inner tri-pot joint to the rear differential axle shaft.