Re: NV4500 swap is underway
 

More famous!

Re: NV4500 swap is underway
 

I made my own version of the aa bracket. it uses the factory shifter. works great. will have to see if I have any pics of it.

Re: NV4500 swap is underway
 

I would like to see your pics if you can find them. I am wanting to keep my factory shifter when I do my swap.

Re: NV4500 swap is underway
 

Hey larry I know its been a while since the last time but im getting closer to installing my nv4500 and 205 ifinally got clutch pedal assembly got mc installed just got a new flywheel for a 2007 6.0 i dont think i mentioned my 79 k5 has a 08 5.3 so question is what clutch and plate do I need to complete the swap. Alot of people run a old school chevy clutch but im not to sure I been reading alot im kind of confused. According to the forums the 6.0 flywheel makes up the gap on the crank on these ls engines but I run a clutch for a 6.0 I might have disengage issues not sure what do you think?

Re: NV4500 swap is underway
 

I don’t have the answer to that one buddy. I’m running an 8.1L which is a different animal to the Gen III small blocks where the 8.1L accepts the same ole 12” clutch and pressure plate as any other older SBC or BBC. You’ll have to ask around to someone that has done a NV4500 behind a Gen III small block

Re: NV4500 swap is underway
 

dirty larry sorry to ask such a repeat question ive recently bought an 8.1 and plan on installing in my 97 3500hd that had a 6.5 diesel with a manual 5 sp nv4500, what i gather from reading your build does the swap on require a 8.1 manual flywheel the nv4500 already existing clutch setup or am i interperting it incorrect if so what clutch would i need?

Re: NV4500 swap is underway
 

Yes, the 8.1L will need its own flywheel. The flywheel bolts pn is 12561465 and the flywheel itself is 12582964. 8.1L’s were used in 2001 and 2002 GMT400 3500-HD trucks so I would use one of those truck models for parts look up to compare part numbers somewhere like Napa or Rock Auto between the clutch/pressure plate for a 6.5L vs. 8.1L. I doubt they are the same clutch and pressure plate.

Re: NV4500 swap is underway
 

How do i identify the model nv4500 in my 97 to a 01-02 manual if their even the same. Like bellhousing patterns.

Re: NV4500 swap is underway
 

Larry, did you ever swap out your rear Detroit for a selectable?

Re: NV4500 swap is underway
 

No, not yet. Too many other projects cooking. One of these days tho. Don’t want an ARB but more of an E-locker. Don’t feel like fidding with a compressor and lines. Don’t have much more room under this thing :lol:

Re: NV4500 swap is underway
 

larry if you still have that 2003 bellhousing would you consider selling it?

Re: NV4500 swap is underway
 

Hey Larry, I'm considering an 8.1 swap. I have leads on an entire truck and another lead on just motor cpu and harness, which is a better option in your opinion. The motor is a 1/3 less price then truck with motor. Are there many incidentals that are beneficial having the complete truck?

Re: NV4500 swap is underway
 

Bilfman,

Personally, I would just go after the engine and ECM. There isn’t anything else from the truck itself that you would really need, including the harness. I would not bother with a donor harness from a truck. The best $500-$700 you can spend on a swap like this is starting with a brand new fresh stand-alone harness from one of many harness vendors. Howell has a decent harness although their consistency seems to a moving target as both my K10 and Suburban harnesses were ordered alike but showed up completely different (trunk lengths, etc.). On the other hand, Howell does have a nice ECM tune for the 8.1L with or without electronic throttle. I use 96-00 L29 7.4L mechanical throttle bodies on both of mine.

If you haven’t already, read through THIS thread. I created it to help 8.1L swappers with the basics and slow down on the PM and highjack traffic.

Re: NV4500 swap is underway
 

Awesome thanx for the info, i'll keep the forums posted once the build begins.

Re: NV4500 swap is underway
 

As I read your entertaining and informative threads... I start to forget the information I read earlier. That being said... I recently purchased an 8.1 out of an 04 (maybe 05, have to drive a few hours to get it) with an Allison 1000. I want to ditch the Allison in favor of an NV4500. I'm more interested in getting the later 5.61 1st gear anyway (95 and up.)

Are there any adaptabilty differences to the 8.1 between the earlier GM NV4500 and the later ones?

Thanks very much in advance!

Re: NV4500 swap is underway
 

From what I can tell, the early NV4500 will bolt up but you will need to use an early GM NV4500 bell too which brings up another bag of worms with the slave being on the passengers side. I don’t believe the AA bell that I am using will work with an early NV4500 as their site says 96 and up.

Re: NV4500 swap is underway
 

Oh man this stuff makes me scratch my head.

Thank You!

Re: NV4500 swap is underway
 

AA makes bellhousings for both early and late GM NV4500s. PN 712577 is for 93-95 transmissions and PN 712576 is fit 96 and up. Neither of them are cheap.

Re: NV4500 swap is underway
 

I've seen these. And I appreciate it. Just trying to figure out which transmission I should go for. Are they all internal slaves? In Larry's previous post he mentioned about slave being on the passenger side. Is this internal on the pass side or external?

Re: NV4500 swap is underway
 

93-95 are all external slaves. 96 and up are the unitized slave-bearing.

Re: NV4500 swap is underway
 

93-94 have the low first gear. 95+ have the higher first gear.
93-95 share the same bellhousing bolt pattern. 96+ is different.
So 95 is the year to get if you want to use the factory GM bellhousing with the higher gearing.
if you are just going to use an aftermarket bellhousing then it really doesn't matter.

Make sense?

Re: NV4500 swap is underway
 

Thank you. Much more sense. 95 has the 1st gear I want and an external slave. Thank you.

In your wisdom, do you recommend utilizing an internal or external slave? I realize if the internal slave fails I have to take out the transmission, but is plumbing a set up for an external slave any harder? The ol' SM465 in mine has a mech linkage so I will have to retrofit.

I'm not new to wrenching but I am new to swapping around parts from different years and going from a carb'd straight 6 to an EFI BB. Your knowledge sharing isn't being wasted and I appreciate your time.

Re: NV4500 swap is underway
 

Well as Larry was saying the only problem with using a factory 93-95 bellhousing with external slave is that the slave is located low on the passenger side. In the 90's the trucks switched to drivers side front driveshaft. So its a bit of a conflict having the front driveshaft on the passenger side and the slave cylinder on the passenger side because it sits kind of low on the bellhousing. If you have a god size lift and a not too flexible suspension perhaps it isn't a problem.

The plumbing isn't really any harder. You can use the factory master, line and slave cylinder. They use a unique clip type fittings. But you can buy an adapter fitting made by Russell, or similar, from Summitracing that will convert that to -AN size, in the case that you want to make a custom line or convert and use a different master cylinder.

Re: NV4500 swap is underway
 

Some people have said that the internal slaves have a bad reputation of failing, and then obviously they are a pain to replace. But it sure would make the installation a lot cleaner.

Re: NV4500 swap is underway
 

Thanks very much and I'll take it into consideration. I wonder if they really do have a high failure rate or if it's just the face that the are a PITA to install. Thanks for the time.