iv heard yes and no.... so im here to see if anyone knows for a fact...

will a lower pulley for a 2001+ fit on my 2000 Lightning??? Iv seen someone with one that said his was a 2001 pulley and he had a 1999... but just wanted to see before I paid for it...

 

I was told NO so, I traded for the upgrade for 01-02.

 

From what I understand the bolt spacing is different between the 99-00 and the 01+, so I wouldn't try an 01+ pulley on a 99-00.

Tom

 

The bolt spacing is the same. The difference is the hub width. The 2001+ have a wider hub. If you used a 2001 pulley and spaced it perfectly on the narrower hub I would expect it would work okay. There is the chance that it could shift though and that may not be wanted. Also I think having it fit on the hub tightly would take away stress from the 3 bolts holding it on. Thos are just my thoughts and they may be wrong.

 

i dont think they will work, i believe that the way the 99-00 connect to the crankshaft is different than the way 01+ connect.

 

well like I said, i saw one on a 1999.... so I know its possible... just dont know whats involved to make it work

 

Here is the deal.

The '99 and '00 OE pulleys mount to an adapter whereas the '01 and later have a special damper that has the mounting thread as an integral piece.

The net result is that the aftermarket pulleys are different. The '99 and '00 have a smaller bore than the '01 and later. A pulley made for the early engine can easily be modified by setting it up in a lathe and boring it out. The converse can be accomplished by machining a reducing ring and pressing it into the larger bore of the late style pulley. I have the exact dimensions at my shop. Send me an e-mail if you want them.

While this is a relatively simple machining operation, unless you have a "friendly" machine shop handy, it may be less expensive to sell your pulley and buy the correct one, especially in the latter case.

Mad

 

I have the adapter ring that you'll need if you want to put the late pulley on the 2000. If you need it, shoot me an e-mail.

I've also bored out an early pulley to fit on later crank. Do a search for my post on pulley diameters about 3 months ago.

 

Yes it will work, the Newer pulley can be used on a old truck but the old pulley cant be used on a newer truck with making the hole bigger.

 

I have a 01+ pulley on my 99L.(like i told you scott) Let me tell you its fun trying to make sure the pulley is centered. Alot of trial and error. You have to put it on start the motor and make sure it dosent wobble or anything. I got my 6lb localy and the price was right so i went ahead and got it. But id just buy one thats made for a 99-00 and not have to deal with it.

 

here is a photo that will sortof illustrate what is being discussed.

this is a photo of my motor. the balancer is a BHJ SFI approved balancer.

the engine is an '03, but the balancer hub is machined the same as a 99-00.

so basically, the balancer you see in the picture is equivalent in siz/shape/demension to any stock 99-00 L balancer.

however, the pulley is a 01-04 pulley that I had been using on the truck before I built the new motor.

as you can see, the 01-04 pulley has a larger center diameter.

the 01-04 pulley will physically bolt onto the 99-00 balancer, but there is no flange to center the pulley. you can see this by the gap between the inner diameter of the pulley and the flange on the center of the balancer.



what this means is that although it will physically bolt on, there is nothing to center it. it will be close, but it may or may not be centered. this could cause a vibration and engine and bearing damage.

due to the larger hub flange on the 01-04 balancers, a 99-00 "small center" pulley cannot be swapped to a newer truck.

hope this helps.

good luck.

later,
chris