The Stovebolt Site Forums The Parking Lot '60-'66 Trucks NV4500 swap

Anyone know if you can do a direct swap from the SM420 to a NV4500 in a 65 Chevy bell housing with a 292 inline 6?

Short answer is no, it’s not a direct swap. Adapters are available.🛠 This info based on our own Search function and a search for NV4500. Try a search, you might just find the exact info you need.

I think that advance adaptors can supply what ever that you need to do the job
ron

It looks like the 93-95 GM transmissions are the ideal candidates, still using the early Muncie style front pattern. I'm assuming they are like finding unicorns by now. Not to mention seems like ALOT were 4wd.

Here's some good info on adapting the NV4500.

NV4500 to Jeep

NV4500 to Dodge

Looks like Advance Adapters sells kits for doing swaps.

Info

Kits

If you have a later model trans, it may be possible to just have the lower holes drilled in the NV4500 case and have your bellhousing center hole opened up.

COOL THANKS SO MUCH!

You can put an n4500 up to a 292 with a little machine work. No adapters are required. However it needs to be a 92-95 one. It's pretty easy.

Perfect! Thanks for that info. I will go dig up one of those 92-95 NV4500s
What mods/machine work would i have to do?

Here is a little secret. It's assumed these where only in the 3/4 and one ton trucks. But 93-95. 1/2 ton." WT" 4x2 trucks . Those special option Cheyenne trucks. Got the nv4500 if it came with a 5 speed. They even put them behind the little 4.3 v6. That's my favorite way to find them. Those work truck optioned rigs are easy to find and they don't cost much money generally. I always find them sitting at landscapers and contractors back lots.

I like secrets! Thats great to know!
What mods/machine work would i have to do?

If you find a 68-72 Chevy pick up manual bell housing that removes one step. And allows you to still keep your cradle mount on the bell housing. If you use your earlier bell you need to have the center bore opened up to the 5.120 size of the early nv4500. Then you drill and tap the front to 1/2 x20 on the front of the trans for the muncie pattern. Add the pivot stud to the retainer on the trans. And bolt the bell to the trans. Uses all the stock clutch and pilot bearing. You need to cut a new hole in the floor for the shift tower.

I am going to send a pm. I like this site. But pictures are worth a 1000 words.

what i have going on is i have a 1954 Chevy 3100. i have put a 292 in it with the 1965 bell housing that bolts to my original cross member. i have bolted my original 54 sm420 trans to it. all this is installed and working in my truck and i drive it. i will have to do the mod to my bell housing since its already in there.

couldnt i just use the fork thats already on my 65 bell housing?

http://67-72chevytrucks.com/vboard/showthread.php?p=6488778&posted=1#post6488778
Check out that thread. That's how I did mine. Used the stock bellhousing and stock clutch linkage. If you don't mind changing out your transmission crossmember (I did mind, hence the adapter plate), the stock chevy bellhousings for any of the nv4500 transmissions will bolt up to the later i6's, sbc, bbc, and w motors. You just end up having a transmission mount at the rear of the trans instead of under the bellhousing