Nv4500 swap

[Affronblaze84]

Hey guys,
I picked up an nv4500 and I’m trying to put in in my 84 blazer… the trans came out of a 2001 2500 Silverado with a 6.0. My truck currently has an early 70s 350, and I’m trying to figure out what flywheel/ clutch/ pressure plate combo would fit. Will the setup off something like an sm465 be best? I’m curious because I know with the later year small blocks and ls engines the crank flange for the flywheel are recessed and I’m not sure what would fit. Any input would be extremely helpful.

 

[Chickntrk]

@Fastereddie just put a 4500 in place of a 465, I think he used the clutch setup that he had with the 465, I’m sure he’ll chime in

 

[Fastereddie]

@Fastereddie just put a 4500 in place of a 465, I think he used the clutch setup that he had with the 465, I’m sure he’ll chime in

No, I didn’t use any of the clutch setup from my 465. I used the ‘95-up internal slave/throw out and bellhousing. The only thing I carried over was the master cylinder and reservoir. I kept my flywheel but bought a centerforce dual friction clutch for a ‘95 2500. Some of the other members on here have the same setup but for some unknown variable, I had interference issues between the slave/throw out and the hub of the clutch disk. I ended up milling off the raised ridge on the disk. Works great now. I went round and round with centerforce technical guy’s measuring everything for them and taking pictures. Everything seemed like it should work. Personally, I think the center hub of the disk was assembled backwards. There’s some pics and stuff in my build thread. Starts around here.

Post in thread ''84 K5 Build (Midlife Crisis)'
https://ck5.com/forums/threads/84-k5-build-midlife-crisis.328278/post-4295109

 

[imiceman44]

Hey guys,
I picked up an nv4500 and I’m trying to put in in my 84 blazer… the trans came out of a 2001 2500 Silverado with a 6.0. My truck currently has an early 70s 350, and I’m trying to figure out what flywheel/ clutch/ pressure plate combo would fit. Will the setup off something like an sm465 be best? I’m curious because I know with the later year small blocks and ls engines the crank flange for the flywheel are recessed and I’m not sure what would fit. Any input would be extremely helpful.

I can tell you for sure the flywheel has to be from your engine year.
The clutch I think the same but if I am wrong someone will chime in.
@Fastereddie used a newer clutch, but he didn't say the one from sm465 wouldn't work, just that he didn't use it.
I will wait for him to confirm

 

[Fastereddie]

I can tell you for sure the flywheel has to be from your engine year.
The clutch I think the same but if I am wrong someone will chime in.
@Fastereddie used a newer clutch, but he didn't say the one from sm465 wouldn't work, just that he didn't use it.
I will wait for him to confirm

The clutch you use depends on what type of throwout setup your using. If you have the internal concentric slave/throwout or the fork style.

 

[ZooMad75]

Eddie has it right. The clutch depends on what way your throw out bearing setup will be. In this case since the trans came from a newer truck it will have the integrated hydraulic release bearing. So you would need to get a clutch for a ‘96 and newer gmt400 truck. I wouldn’t get a clutch for a gmt800 truck that the trans came from since that would have been a 6.0 ls unit. The 400 truck would match up if you spec one out for a 2500 truck with a 350.

If you want to convert the later trans to use a mechanical release bearing you could use any clutch intended for squarebody that had a 465 manual to start with.

The main difference between the early and late versions is the height of the fingers on the pressure plate. While I never measured the difference when doing the research on the clutch for mine multiple suppliers like centerforce, Luk and the GM parts catalog listed differing part numbers for 4500 clutches and they line up with the change in release bearing styles. 95 and earlier take one, 96 and later take a different part number.

 

[imiceman44]

Eddie has it right. The clutch depends on what way your throw out bearing setup will be. In this case since the trans came from a newer truck it will have the integrated hydraulic release bearing. So you would need to get a clutch for a ‘96 and newer gmt400 truck. I wouldn’t get a clutch for a gmt800 truck that the trans came from since that would have been a 6.0 ls unit. The 400 truck would match up if you spec one out for a 2500 truck with a 350.

If you want to convert the later trans to use a mechanical release bearing you could use any clutch intended for squarebody that had a 465 manual to start with.

The main difference between the early and late versions is the height of the fingers on the pressure plate. While I never measured the difference when doing the research on the clutch for mine multiple suppliers like centerforce, Luk and the GM parts catalog listed differing part numbers for 4500 clutches and they line up with the change in release bearing styles. 95 and earlier take one, 96 and later take a different part number.

Good to know.
I am planning on using the hydraulic release bearing so I need the newer clutch

 

[Big Ray]

Hey guys,
I picked up an nv4500 and I’m trying to put in in my 84 blazer… the trans came out of a 2001 2500 Silverado with a 6.0. My truck currently has an early 70s 350, and I’m trying to figure out what flywheel/ clutch/ pressure plate combo would fit. Will the setup off something like an sm465 be best? I’m curious because I know with the later year small blocks and ls engines the crank flange for the flywheel are recessed and I’m not sure what would fit. Any input would be extremely helpful.

If you're using the external slave cylinder you need at least a 4 inch lift. The cylinder is on the passenger side.
Campfire drilled his nv4500 so he could use the earlier bell housing.

 

[CT-BLAZER]

Advance Adapters did can excellent write up in the past ... They published bulletins regarding the various NV4500 transmissions....

Differences between bellhousings , hydraulics etc.

External hydraulics have virtues + easier to service .

Advance Adapters makes multiple bellhousings for interchangeable applications.

 

[muddybuddy]

If you're using the external slave cylinder you need at least a 4 inch lift. The cylinder is on the passenger side.
Campfire drilled his nv4500 so he could use the earlier bell housing.

Didnt realize lift was needed. Thats only for external slave? Is that because tcase/driveshaft interference? Does driver drop resolve that?

 

[ZooMad75]

Didnt realize lift was needed. Thats only for external slave? Is that because tcase/driveshaft interference? Does driver drop resolve that?

If you use the early GMT400 nv4500 bellhousing the slave is on the passenger side. So if the truck has less than 4" of lift the slave and front driveshaft are fighting for the same real estate. The AA bell is on the other side like a stock 465 hydro bell.