How to Install a PA Performance Alternator on Your 1999-2004 GT Mustang

This Mustang Parts Installation Guide Works For

PAPerformance Alternator - 130 Amp (99-04 GT)DOWNLOAD PDF

Tools Required

  • 1/4" and 3/8” Drive Ratchets
  • 8mm Socket
  • 10mm Socket
  • 3” Extension
Installation Time: 2 Hours


  1. Unhook negative battery cable with 8mm socket and ratchet.
  2. Loosen drive belt with belt tensioner by inserting 1/4" ratchet into the tensioner and turning clockwise. Then remove the belt from the stock alternator pulley while keeping tension off of the belt.
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  4. Loosen the nut on top of the stock alternator with a 10mm socket and remove power cable.
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  6. Remove the (2) front bolts from the bracket on top of the alternator using a 10mm socket.
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  8. Remove hose from the PCV valve to allow access to the rear bolts of alternator bracket. Loosen bolts with 10mm socket and ratchet.
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  10. Loosen the lower bolts holding alternator in place with a 10mm socket and ratchet. A 3” extension may be needed to loosen the driver’s side bolt. Do not completely remove.
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  12. Remove the plug from the back of alternator; it should slide right out.
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  14. Pull the alternator forward and remove from engine.
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  16. Place the new alternator in place of old alternator and reattach plug to the back.
  17. Tighten (2) lower alternator bolts using a 10mm socket.
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  19. Replace front and rear bracket bolts to the top of alternator and tighten with 10mm socket.
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  21. Remove nut from the post on the top of the new alternator and reattach power cable. Tighten nut with 10mm socket.
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  23. Replace hose to PCV valve.
  24. Replace drive belt, making sure everything is lined up correctly and re-tension the belt. This would be a great time to replace the belt if it appears cracked or worn.
  25. Replace negative battery cable using 8mm socket.
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Installation Instructions written by AmericanMuscle customer Nathan Latawiec 3.23.12