The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Jesse 67 c-10 · 10-27-2002, 12:31 AM

I'm pretty sure going 5 speed and using as many original components as possible are inversly related! kind of like milage and hp, I used a getrag 5 spd from a half ton, the lighter weight model, no granny gear, seems to be holding up ok to my 327, but I'd go for a nv4500 for something heavy duty, the later model 4500's don't have as low a granny gear either so they would be great. or if you can find a getrag from a 3/4 t, I believe there is such a thing, getrags are great trannys, shift very nice! mine does at least. any 5 spd from a gm truck up to 98 will bolt to an old sb. after that the motors changed so the bolt pattern would be diff. All new 5 speeds (as far as I know) require a hyd clutch, can be done, I did it, also most newer ones have an elec speedo output. This is what I know about the gm ones. You'll spend quite a bit more doing this conversion than on say a th350 but it's worth it! otherwise you can shell out for an aftermarket tranny, richmond gear? how bout a lenco?

Jesse

10-27-2002, 12:31 AM	#4
Jesse 67 c-10 Registered User Join Date: Feb 2000 Location: Edmonton, Alberta, Canada Posts: 599	I'm pretty sure going 5 speed and using as many original components as possible are inversly related! kind of like milage and hp, I used a getrag 5 spd from a half ton, the lighter weight model, no granny gear, seems to be holding up ok to my 327, but I'd go for a nv4500 for something heavy duty, the later model 4500's don't have as low a granny gear either so they would be great. or if you can find a getrag from a 3/4 t, I believe there is such a thing, getrags are great trannys, shift very nice! mine does at least. any 5 spd from a gm truck up to 98 will bolt to an old sb. after that the motors changed so the bolt pattern would be diff. All new 5 speeds (as far as I know) require a hyd clutch, can be done, I did it, also most newer ones have an elec speedo output. This is what I know about the gm ones. You'll spend quite a bit more doing this conversion than on say a th350 but it's worth it! otherwise you can shell out for an aftermarket tranny, richmond gear? how bout a lenco? Jesse __________________ Edmonton, Alberta, 67 c-10, Long fleet, front disks, 5 lug rear end, 327 with Vortechs, edlbrock manifold, comp cams XE 256, 600cfm carb. Backed by a getrag 5 speed and 1 piece driveshaft. 1993 Dihatsu Hijet Jumbo cab 4x4, currently converting to battery electric power.