Up to a certain point, the length of the drive shaft has little effect on the performance of a vehicle.  Because of this, engineers use the drive shaft length as a way to make up for the slack when they tinker with other components of the vehicle.  Unfortunately, for those of us in the aftermarket business, it is nearly impossible to use application (year, make, model) to determine what length of drive shaft is being used with any confidence.  Many times, the same model within the same year will have slightly different drive shaft lengths because there was some minor change somewhere else on the vehicle during that production cycle (engine, transmission, wheel base, etc.).  Add to this, any customizations and lifts you or a previous owner may have put on the vehicle and it means you are going to have to slide under the vehicle and take a measurement.

All drive shafts need some sort of slip yoke component.  This allows the shaft to absorb the shocks of the road while still maintaining its function.  There are two common types of rear drive shafts in use.  The first has a transmission yoke which slides onto the output shaft and acts as the slip yoke component.  The second has a fixed flange or fixed joint connecting to the transmission/transfer case and requires a slip and stub assembly built onto the shaft. 

We accept five different "from where to where" measurements.  The best and most accurate measurement for you to use depends on the connection components from your transmission/transfer case and your rear differential.  Determine which of the four connection components your drive shaft needs.  (Note: the connection component on the front will more often than not be different than the connection component on the rear.)  When you determine your components, scroll down until you see that combination to find how to best measure.  If you have the old drive shaft and just need a replica made, use the Center of U-Joint to Center of U-Joint measurement.

(Note: You will be prompted to give the exact measurement (within an 1/8 of an inch) after your drive shaft is added to your cart.)

Connection Components

Transmission Yoke

Transmission Yoke

Transmission Yoke

"Explain what a output shaft looks like on the vehicle, with the seal and conical cover."

Flange

Flange

Flange

Disk

Disk

A flange can be used on the front and/or rear.  The connection component on the transfer case or rear differential will be a disk which the flange will be bolted onto directly.

Open Joint

Open Joint

Open Joint

Pinion Yoke/End Yoke

Pinion Yoke/End Yoke

An open joint can be used on the front and/or rear.  It will be held by an end yoke from the transfer case and a pinion yoke from the rear differential.  The joint will be held by these components by straps and bolts.


Front: Transmission Yoke   Rear: Open Joint

There are two measurements we will accept for this combination.

1) If you have the transmission yoke you will be using...

...slide the transmission yoke onto the output shaft until in bottoms out, pull it back 1 inch, and measure from the Center of U-Joint to Center of U-Joint.  See picture below:

Measurement: Center of U-Joint to Center of U-Joint

Measurement: Center of U-Joint to Center of U-Joint

2) If you don't have the transmission yoke you will be using...

 ...measure from the Tip of the Output Shaft to the Center of the U-joint in the Pinion Yoke.  See picture below.  (Note: if you would like to add on a transmission yoke to your order, you will be able to after you add the drive shaft to your cart.)

Measurement: Tip of Output Shaft to Center of U-Joint

Measurement: Tip of Output Shaft to Center of U-Joint


Front: Transmission Yoke   Rear: Flange

There are four measurements we will accept for this combination.

1) If you have both the transmission yoke and the flange you will be using...

...slide the transmission yoke onto the output shaft until in bottoms out and pull it back 1 inch.  Bolt/Hold the flange flush against the rear differential disk and measure from the Center of U-Joint to Center of U-Joint.  See picture below:

Measurement: Center of U-Joint to Center of U-Joint

Measurement: Center of U-Joint to Center of U-Joint

2) If you have the transmission yoke you will be using but not the flange...

......slide the transmission yoke onto the output shaft until in bottoms out, pull it back 1 inch to 1 1/2 inches, and measure from the Center of U-Joint to Flange Face.  See picture below.  (Note: if you would like to add on a flange to your order, you will be able to after you add the drive shaft to your cart.)

Measurement: Center of U-Joint to Flange Face

Measurement: Center of U-Joint to Flange Face

3) If you have the flange you will be using but not the transmission yoke...

...bolt/hold the flange flush against the rear disk and measure from the Tip of the Output Shaft to Center of U-Joint.  See picture below.  (Note: if you would like to add on a transmission yoke to your order, you will be able to after you add the drive shaft to your cart.)

Measurement: Tip of Output Shaft to Center of U-Joint

Measurement: Tip of Output Shaft to Center of U-Joint

4) If you don't have either the transmission yoke or the flange you will be using...

...measure from the Tip of the Output Shaft to Flange Face.  See picture below.  (Note: if you would like to add on a transmission yoke and/or flange to your order, you will be able to after you add the drive shaft to your cart.)

Measurement: Tip of Output Shaft to Flange Face

Measurement: Tip of Output Shaft to Flange Face


Front: Flange   Rear: Flange

If your shaft doesn't have a transmission yoke, a slip yoke will need to be built into the drive shaft.  There are three measurements we will accept for this combination.

1) If you have both flanges you will be using...

...bolt/hold the flanges flush in place and measure from Center of U-Joint to Center of U-Joint.  See picture below.

Measurement: Center of U-Joint to Center of U-Joint

Measurement: Center of U-Joint to Center of U-Joint

2) If you have only one flange you will be using...

...bolt/hold the flange flush in place and measure from the Center of U-Joint to Flange Face.  It doesn't matter whether you have the front or rear flange; the measurement will be the same.  See picture below.  (Note: if you would like to add on a flange to your order, you will be able to after you add the drive shaft to your cart.)

Measurement: Center of U-Joint to Flange Face

Measurement: Center of U-Joint to Flange Face

3) If you don't have either flange you will be using...

...measure from Flange Face to Flange Face.  See picture below.  (Note: if you would like to add flanges to your order, you will be able to after you add the drive shaft to your cart.)

Measurement: Flange Face to Flange Face

Measurement: Flange Face to Flange Face


Front: Flange   Rear: Open Joint

If your shaft doesn't have a transmission yoke, a slip yoke will need to be built into the drive shaft.  There are two measurements we will accept for this combination.

1) If you have the flange you will be using...

...bolt/hold the flange flush in place and measure from Center of U-Joint to Center of U-Joint.  See picture below.

Measurement: Center of U-Joint to Center of U-Joint

Measurement: Center of U-Joint to Center of U-Joint

2) If you don't have the flange you will be using...

...measure from Flange Face to Center of U-Joint.  See picture below.  (Note: if you would like to add on a flange to your order, you will be able to after you add the drive shaft to your cart.)

Measurement: Flange Face to Center of U-Joint

Measurement: Flange Face to Center of U-Joint


Front: Open Joint   Rear: Flange

If your shaft doesn't have a transmission yoke, a slip yoke will need to be built into the drive shaft.  There are two measurements we will accept for this combination.

1) If you have the flange you will be using...

...bolt/hold the flange flush in place and measure from Center of U-Joint to Center of U-Joint.  See picture below.

Measurement: Center of U-Joint to Center of U-Joint

Measurement: Center of U-Joint to Center of U-Joint

2) If you don't have the flange you will be using...

...measure from Flange Face to Center of U-Joint.  See picture below.  (Note: if you would like to add on a flange to your order, you will be able to after you add the drive shaft to your cart.)

Measurement: Flange Face to Center of U-Joint

Measurement: Flange Face to Center of U-Joint


Front: Open Joint   Rear: Open Joint

If your shaft doesn't have a transmission yoke, a slip yoke will need to be built into the drive shaft.  There is only one possible measurement for this combination.

Measure from Center of U-Joint to Center of U-Joint.  See picture below.

Measurement: Center of U-Joint to Center of U-Joint

Measurement: Center of U-Joint to Center of U-Joint