The belt is in great condition, but I%26#039;m installing a high--output alternator that has an overdrive pulley that has six ribs. My current belt will fit in/over four of the ribs, but I want to know if it is necessary to seek out a wider belt that has 6 ribs. Will it make that much of a difference if I keep the existing belt on there? Thanks.|||Yes its better to put a new one with the exact size for your new alternator. Your old belt could start a new problem in the future. Hope this helps!|||oh yes, it will make a difference. that alternator and that pully will have a ton more drag than your stock alternator, so if you use the stock belt that%26#039;s only 2/3s the width needed, it%26#039;s going to slip and squeel like crazy, and the alternator won%26#039;t put out the right voltage. you need to get a 6 rib drive pully and a 6 rib belt to go with it.|||If your original belt has four ribs this means the crank shaft pulley has four ribs. A six rib belt will not fit over the crank shaft pulley. It sounds like you will need to change the pulley on the alternator from a six rib to a four rib. If you use a four rib belt on a six rib pulley the belt may wear out to quickly.|||no you dont need a new one. the amount of ribs on the pulley has nothing to do with the alternator. it has to do with the amount of ribs on the crank and or waterpump pulley. so even if you did get a new wider belt. it wouldnt fit on your crank pulley. so yes the stock one will do. just make sure u line it up on the right ribs, if you dont, your going to hear a light scraping/squeeking noise. because the belt will be slightly slipping.|||the belt rides on more than just the alternator
if the crankshaft pulley only has 4 ribs you can not use the 6 rib belt
you are better off using the belt you have
you should have transferred the pulley from your old alt to the new one
Jim|||Is your crank pulley 4, then you can%26#039;t put a 6 ribbed belt on a 4 ribbed pulley.
Beside that point, don%26#039;t you need a longer belt to use with the overdrive pulley.|||yah it might be safe to put the new belt on incase if u put the old one back it might slipe off or start to tare up|||it is not Necessary to change the belt|||You could use the original but I would play safe with a correct width new belt.
