Mustang SPEC 164T Billet Steel Flywheel (1965-1973) Installation Instructions

Tools Required:
  • Floor Jack & Jack Stands
  • Chalk
  • Ratchet
  • Standard & Allen Socket Sets
  • Torque Wrench
  • Clutch Alignment Tool
  • Impact Wrench
Install Difficulty:
  • Moderate
  • Moderate Project
1. To begin the installation of your new Mustang SPEC Clutch SF15S 164 Tooth Billet Steel Flywheel, raise the vehicle off of the ground and secure with jack stands.
2. Remove the Mustang driveshaft. Use chalk to put indicator marks on the driveshaft and the yoke of the differential. This will ensure that it goes back in the same way that it was removed.
Mustang SPEC Billet Steel Flywheel Install Image
3. Unbolt the Mustang shifter and the speedometer cable. The shifter does not have to be removed (although it will be easier with it out of the way), but it does need to be unbolted from the transmission.
Mustang SPEC Billet Steel Flywheel Install Image
4. Remove the four bolts that secure the transmission to the Mustang bellhousing and unbolt the cross member. Support the transmission with a floor jack.
Mustang SPEC Billet Steel Flywheel Install Image
5. Slide the Mustang transmission out of the bellhousing.
6. Remove the Mustang starter and the bolts that secure the bellhousing to the block.
7. Remove the bellhousing. Please note that this picture was taken with the engine removed from the vehicle. It is NOT necessary to remove the Mustang engine.
Mustang SPEC Billet Steel Flywheel Install Image
8. Remove the bolts that secure the pressure plate to the Mustang flywheel. Once all bolts are removed the pressure plate and clutch can be removed from the flywheel. Inspect the flywheel for wear and resurface or replace if necessary. Caution: When the last bolt is removed the pressure plate will fall off of the flywheel. Be sure to secure the pressure plate before removing the last bolt.
9. Remove the bolts that secure the old flywheel to the Mustang crankshaft.
Mustang SPEC Billet Steel Flywheel Install Image
10. Install the new SPEC Clutch flywheel. The flywheel can only be installed one way. Rotate the flywheel untill all of the bolt holes are aligned. Install the bolts and torque to manufacturer specifications. If using ARP bolts the specs are 75 ft/lbs. If the engine begins to rotate use a clamp to secure the flywheel to the block plate. Be sure to use a clamp with soft jaws to prevent damage to the flywheel.
Mustang SPEC Billet Steel Flywheel Install Image
11. This is what the flywheel should look like when installed.
Mustang SPEC Billet Steel Flywheel Install Image
12. Next install the Mustang clutch kit. Clean the flywheel and pressure plate surfaces with brake cleaner to remove any oils. Insert the clutch alignment tool through the clutch and into the pilot bushing. The clutch will be marked for which side goes toward the flywheel. Do not install the clutch backwards.
Mustang SPEC Billet Steel Flywheel Install Image
13. With the Mustang clutch disc alignment tool still in place, install the pressure plate. The bolts should be torqued to 35 ft/lbs. Once the bolts are torqued, you can remove the alignment tool.
Mustang SPEC Billet Steel Flywheel Install Image
14. Reinstall the bellhousing and starter. The Mustang throwout bearing should be orientated on the clutch fork as shown in the picture below. Now adjust your clutch linkage so that the throwout bearing is not in constant contact with the pressure plate. Constant contact with the pressure plate will cause premature failure of the bearing.
Mustang SPEC Billet Steel Flywheel Install Image
15. Install the transmission. Using a floor jack, raise the transmission to a height that will allow it to pass directly through the throwout bearing and clutch, then into the pilot bushing. It may be necessary to turn the motor over (by hand) to get the splines to line up on the transmission input shaft and the clutch. Once everything has slid together, install the bolts that secure the transmission to the bellhousing, bolt the shifter back on, and reinstall the cross member. Finally reinstall the driveshaft, making sure that your chalk marks are aligned. After this, the installation of your new Mustang SPEC Clutch 164 Tooth Billet Steel Flywheel is complete.
Mustang SPEC Billet Steel Flywheel Install Image