Alternator

[hi8ha]

What is the difference between a 996 C2 MY99 manual and a 996 C2 MY99 automatic alternator? It is my understanding that there is a difference.

[logray]

A great thread, and the answer here:

http://forums.pelicanparts.com/3934281-post5.html

"There are two different alternators for the 996 and 986 for the early year cars depending on transmission type. The only difference between them is the pulley. The automatic cars have a standard fixed pulley while the six speed cars have a one way roller bearing, or one way clutch, built into the pulley. The one way bearing/clutch works like a freewheel sprocket on a bicycle. On the alternator it will allow the engine to drive the alternator as long as the engine is not rotating slower than the alternator. If the engine speed drops then the alternator will carry on spinning freely until it slows down enough for the drive to resume. I won't go into detail, but this helps to reduce the loads on the drive belt which helps to lengthen belt life."

[hi8ha]

!THANKS!!! Great article.

[hi8ha]

A friend gave me a working 996 alternator but is for an automatic. Can the pulley be replaced with the correct one. Saw this on ebay, http://www.ebay.com/itm/Porsche-986-996-997-Alternator-Pulley-clutching-type-OEM-carrera-turbo-/350776282920?pt=Motors_Car_Truck_Parts_Accessories&fits=Make%3APorsche&hash=item51abe54f28&vxp=mtr

Edited May 27, 2013 by hi8ha

[logray]

This thread should clear up your questions.

http://forums.pelicanparts.com/porsche-996-997-forum/656157-alternator-pulley.html

[hi8ha]

Once again... !!!!THANKS!!!!