i am interested in how you set yours up.......so you used a ls1 fw and pp then a 10 spline disc the diameter of the ls1 disc and i am guessing an ls1 slave. so pritty much an ls1 set up with a diffrent disc?

this could be key for my cheap set up....looking at prices if i bought all new items for the nv3500 i would spend the same if not more then buying a t56

 

after thinking about this for a few mins it only makes since that the ls1 flywheel would fit....you use the same starter when swaping to a t56 right....therefore the flywheel is the same diameter as the 4.8 flywheel. the only diffrence i would think is going to be the clutch disc surface area....
anyone know the diameter of a stock 4.8 disc and a stock ls1 disc?

 

i didn't remember that the starter was reusable with t56 (minus the GTO application)

4.8 is 11 7/8

 

looked up some after market flywheels and they have the same flywheel fitting both an ls1 and silverado. i guess the only way to find out is going to be buying stuff and taking the chance

 

where did you find that? i ask because when i called Summit & a couple other places, they told me an LS1 flywheel wouldn't work with the truck trans.

i ain't tryin to say either one of us is wrong, but i would like to know the answer.

 

http://www.jegs.com/webapp/wcs/store...atalogId=10002

these are not the stock flywheel but if you can use clutches from a truck or a car the only diffrence must be the disc contact area.....so if i get all ls1 parts and a 10 spline disc the same diameter of the ls1 disc it should work

 

just got a ls1 clutch/fly set up off ls1tech.....anyone know where i can get just the 10 spline clutch disk?

 

i have a 2004 gmc sierra w/ a 4.8 mated to a nv 3500, thinkin about puttin in my t-56 into the sierra from a 1999 fire bird, which i swaped a 4l60 automatic in to. would the slave cylinder, bellhousin, and fly wheel bolt up to the 4.8 since the ls1 and the 4.8 r of the same bolt pattern? need advise soon because the t-56 is almost done gettin rebuilt. Thanks your info is greatly appricated.

 

bolts right up. i believe it takes a different starter, though. you'll also have to cut a new hole in the floor for the shifter