How to Measure For A Custom Driveshaft
-For vehicles with Live Rear Axle:
Measure from the edge of the seal
(Not the output shaft)
to the centerline of the rear u-joint.
**Please do this at ride height.
The car can be lifted under the differential but make sure it has the weight on the rear springs**
To properly measure the rear end yoke, first determine if the yoke has (2) tabs that the rear joint will sit-in between, or if there are no tabs (tabs are in the picture above) or if it has a flat plate.
Be very careful with this measurement. The size changes in increments of 1/16" (1-1/16" | 1-1/8" | 1-3/16")
For vehicles with a slide in transmission yoke and a flat flange on the differential:
Also measure the flange pattern as shown here:
For vehicles that use a flat flange on the transmission and a flat flange on the differential:
Please Provide the Following Information:
1. Transmission Year/Make/Model (please advise spline count if possible)
2. Differential Info: What did it come from? Does it have u-bolts or straps and (4) bolts, or does it have a flat plate (3-bolt / 4-bolt / 6-bolt)
3. What HP and torque does the engine currrently produce?
4. If the car is being built for competition please give us a full run down of the car, including weight,tire size and rear gear ratio. All of this will help get you the correct shaft.