ryunker
Member
There are a few solutions out there, here I discuss the oem solution.
The Ford 6R3Z-3932-CA is a genuine OEM steering rack restrictor (also known as a limiter) designed to limit the steering angle on 2005-2014 Mustangs. This modification helps prevent tire rubbing against the fender wells when using larger wheels or tires, effectively increasing the vehicle's turning radius for better clearance. Two restrictors are required—one for each side of the steering rack.
Important Safety Notes:
Right Side Installation
The process is identical to the right side, with the following differences:
The Ford 6R3Z-3932-CA is a genuine OEM steering rack restrictor (also known as a limiter) designed to limit the steering angle on 2005-2014 Mustangs. This modification helps prevent tire rubbing against the fender wells when using larger wheels or tires, effectively increasing the vehicle's turning radius for better clearance. Two restrictors are required—one for each side of the steering rack.
Important Safety Notes:
- This installation involves working under the vehicle and handling steering components. Ensure the car is securely supported on jack stands rated for its weight. Never work under a vehicle supported only by a jack.
- Modifying the steering system can affect handling and may require a professional alignment afterward to ensure proper toe settings.
- If you're not experienced with automotive repairs, consult a professional mechanic.
- Always wear safety glasses and gloves.
- Floor jack and jack stands
- Socket set (including sizes for lug nuts, tie rod, etc.)
- Wrench or pliers for boot clamps
- For right side: 16x1.5 bolt, nut, flat washer (16mm), and an 18mm flat washer (to create a makeshift press)
- New boot clamps (recommended)
- Torque wrench
- Wheel chocks
Right Side Installation
- Prepare the Vehicle: Park the car on a level surface, chock the rear wheels, and lift the front end using a floor jack. Secure it with jack stands under the frame or designated points. Remove the right front wheel for access.
- Position the Steering: Turn the steering wheel all the way to the right to extend the rack on the right side, making it easier to access the components.
- Expose the Inner Tie Rod: Remove or loosen the clamps on the steering rack boot (bellows) and slide the boot back to expose the inner tie rod end and rack shaft.
- Separate the Inner Tie Rod: Unscrew and separate the inner tie rod end from the steering gear rack shaft.
- Install the Restrictor: The restrictor installs on the rack shaft with an interference fit (tight press-fit).
- 5a. Procure a 16x1.5 bolt, nut, 16mm flat washer, and an 18mm flat washer.
- 5b. Assemble the hardware as a "press": Place the nut on the bolt, followed by the 16mm washer, then the 18mm washer, then the restrictor. Screw the assembly into the output shaft. Use the tightening of the nut to push the restrictor onto the shaft until it's flush with the end of the output shaft on the gearbox. Be careful not to damage the shaft threads.
- Reassemble: Screw the inner tie rod back onto the rack shaft. Slide the boot back into place and secure it with new clamps.
- Finish Up: Reinstall the wheel, torque the lug nuts to factory specifications (typically 100 ft-lbs for Mustangs—check your owner's manual), and lower the vehicle. Remove the jack stands.
The process is identical to the right side, with the following differences:
- In Step 2, turn the steering wheel all the way to the left to extend the rack on the left side.
- In Step 5, the restrictor slides onto the shaft easily without an interference fit—no press hardware is needed. Simply slide it on until flush with the end of the output shaft.
