Richie7448

hey everyone, i'm fixin to purchase an 2000 3500 4x4 with a 6 speed which i read somewhere on here that it has the 1 1/4 input shaft. i also heard that the 1 1/4 is only good to 500. do yall know of anyone who sells an upgrade kit to the 1 3/8 shaft. thanks richie

PourinDiesel

southbend clutch sells an upgrade shaft.
But I know someone who ran one and sledpulled with it up into the 700hp area and it never broke.

caleb c.

I thought all of the NV5600's had the 1 3/8 shaft?

blackdiesel

the earlier model 6 speeds (99-01.4 none HO) had the 1 1/4 shaft. not to alot of them around

caleb c.

Ohhh Cool, I didn't know that!

Richie7448

thank you much

PourinDiesel

I said earlier sbc sells an upgrade shaft.
Well I told you wrong.
They sell a 1 3/8's input upgrade for nv4500's. Its not the same as the nv5600 shaft.

You can buy the regular nv5600 1 3/8's shaft from a tranny rebuilder.

Richie7448

about how much would it cost to get the shaft replaced along with a dd clutch?

bgilbert

Are you lookin to sled pull or act stupid with the truck/trans? Most of em don't break on the dirt, but when one gets stupid on the concrete, thats when things break.

Richie7448

im going to get stupid on the street

bgilbert

Yeah you might want all the help you can get then.