Muscle Mustangs & Fast FordsHow To Drivetrain
Our S197 Mustang Gets a Custom GForce Engineering Driveshaft
Twist & Shout
Until recently, the driveshaft was often an afterthought when building a car. Unless it was worn or out of balance, the driveshaft did its duty without complaint. But today, the role of the driveshaft is taken seriously.
The OEM multi-piece shaft does a great job of transferring the torque from the transmission to the rearend with minimal fuss. But when we swapped in a Strange Engineering 9-inch-based rearend, the yoke on the pinion needed a different type of driveshaft. It was a great time to upgrade to the latest technology in one-piece drive shafts from GForce Engineering.
GForce manufactures custom and off-the-shelf driveshafts for most late-model applications, including our beloved Mustangs. After supplying them the measurements the needed, GForce whipped up a custom aluminum one-piece shaft for our 2011 drag Mustang.
The GForce shaft features a 4-inch diameter 6061-T6 aluminum tubing, solid core heavy-duty U-joints, and CNC billet adapters. It eliminates the CV joints, which can be troublesome on high-horsepower Mustangs. The precision-fit splined slip shaft plunges and extends during rear axle movement.
The aluminum shaft saves several pounds of rotating weight over the OEM shaft, and bolts to the flange at the rear of the trans and the 9-inch style yoke on our Strange Engineering rearend.
For the details on the installation, check out the accompanying photos.
1. To get an accurate “static” measurement for our driveshaft, we put the rear axle of the car on jack stands to compress the rear suspension to normal ride height.
2. With the rear suspension at normal ride height, we measured the distance between the driveshaft mounting surfaces. Our final measurement came in at 55.5-inches with the 6R80 transmission and our Strange Engineering 9-inch rearend.
3. The rear of the transmission uses a three-bolt flange (rather than a slip yoke on earlier cars).
4. We slid the shaft into place though our driveshaft loop and bolted it up to the transmission.
5. Then, we moved the rear U-joint into position on the rear end yoke.
6. We used the U-bolts on our pinion yoke to fasten the drive shaft U-joint to the rearend.
7. The U-joints slip into the saddles on this 9-inch-style rearend.
8. With the driveshaft attached, we tightened the U-bolt bolts to spec.