Installing The NV4500 5 Speed Overdrive Transmission In The C-30

[DBear]

Originally Posted by Richard2112

Yes, when I did this I used grade 8 flanged bolts and did face the bolt surfaces at the top two holes.

Good afternoon Richard...trying to revive this old thread LOL. I am about to do this same swap and wanted to know if you could tell me what depth did you drill the new bellhousing holes into the trans case? Thank you in advance sir.

Thomas

[LockDoc]

Originally Posted by DBear

Good afternoon Richard...trying to revive this old thread LOL. I am about to do this same swap and wanted to know if you could tell me what depth did you drill the new bellhousing holes into the trans case? Thank you in advance sir.

Thomas

Hi Thomas,

Not Richard but check out my post #84. It explains what I did with mine. The secret is, if the hole is going to come out too close to the trans main case and force the bit off to the side, stop just as it starts to break through. All of the holes that weren't close to the case I drilled all the way through.

LockDoc
.

[mike16]

I have a question about the high hump transmission cover


Do any vendors sell a high hump transmission cover with no transmission shifter hole in it?

[LockDoc]

Originally Posted by mike16

I have a question about the high hump transmission cover


Do any vendors sell a high hump transmission cover with no transmission shifter hole in it?

I'm pretty sure they are reproduced but I can't tell you off the top of my head who sells them....

EDIT: https://www.classicindustries.com/product/153761.html

They are pretty proud of them. I'm sure there are other vendors that sell them too. I would put out some feelers in your area, you might get lucky....

LockDoc

[mike16]

Wow. They do think very highly of them.

[72 k15]

Sorry to bring up a old thread, but would this technique work for a 4wd nv4500 obviously id have to move the crossmember on the back. Just wondering if the 4wd has the same stick out and pilot size as the sm465

[LockDoc]

Originally Posted by 72 k15

Sorry to bring up a old thread, but would this technique work for a 4wd nv4500 obviously id have to move the crossmember on the back. Just wondering if the 4wd has the same stick out and pilot size as the sm465

I can't answer your question. I have a 4x4 w/NV4500 setup in a '91 Chevy but the engine and trans are still in the truck. I need to get it dismantled but I don't have time right now.

Maybe someone else will know the answer to your question.

LockDoc

[jumpsoffrock]

In May I bought a used NV4500(1993/94 GM version), and was told is was good and useable. I finally got it "installed" in the truck about a month ago and finally finally got a driveshaft made and installed a few days ago last thursday.

I installed it by drilling holes using Leons method. I did a very poor job, but it worked.

The trans is bolted only using 3 of the 4 bolts, tightened with a combo wrench.

Filled with Amsoil MTGQT-EA.

It ran fine, I just wanted to drive it through the gears and specifically into 5th, no grinding, ran good, and I can proceed with other work on the truck knowing it *should* drive fine for the time being.

Thank you Leon.

[LockDoc]

Originally Posted by jumpsoffrock

In May I bought a used NV4500(1993/94 GM version), and was told is was good and useable. I finally got it "installed" in the truck about a month ago and finally finally got a driveshaft made and installed a few days ago last thursday.

I installed it by drilling holes using Leons method. I did a very poor job, but it worked.

The trans is bolted only using 3 of the 4 bolts, tightened with a combo wrench.

Filled with Amsoil MTGQT-EA.

It ran fine, I just wanted to drive it through the gears and specifically into 5th, no grinding, ran good, and I can proceed with other work on the truck knowing it *should* drive fine for the time being.

Thank you Leon.

No problem. Glad you got it dialed in. I don't know which bolt you had trouble with but I would definitely try to get it installed. That trans weighs close to 200 pounds and needs all of the bolts in it if possible.....

LockDoc