Clutch fitment question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Canadian 72 C15 · 12-11-2025, 10:17 AM

I have a 72 GMC half ton with a small black 350 in it currently. Behind it is an SM 465 bull low transmission. I am swapping it out to an NV 3500 from a 2005 GMC half ton. I’m converting it to a hydraulic clutch and slave.

My question is will my pressure plate, clutch and flywheel work with the new transmission?

I have tested the clutch on the input shaft and it has the same spline as the SM 465. I have a 168 tooth flywheel which I know is compatible with an NV 3500. But I’m more so wondering about the pressure plate and the fingers whether they are any different for a hydraulic throwout bearing versus a mechanical fork which came originally on the truck.

Should I be able to just swap in the new transmission with the hydraulic slave and have everything work?

12-11-2025, 10:17 AM	#1
Canadian 72 C15 Registered User Join Date: Oct 2020 Location: Hamilton Ontario Posts: 40	Clutch fitment question I have a 72 GMC half ton with a small black 350 in it currently. Behind it is an SM 465 bull low transmission. I am swapping it out to an NV 3500 from a 2005 GMC half ton. I’m converting it to a hydraulic clutch and slave. My question is will my pressure plate, clutch and flywheel work with the new transmission? I have tested the clutch on the input shaft and it has the same spline as the SM 465. I have a 168 tooth flywheel which I know is compatible with an NV 3500. But I’m more so wondering about the pressure plate and the fingers whether they are any different for a hydraulic throwout bearing versus a mechanical fork which came originally on the truck. Should I be able to just swap in the new transmission with the hydraulic slave and have everything work?



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.