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Figured that I would revive this thread a little. I have the SM465/NP203/D300 in my CJ7. I'm moving forward on my tube buggy build and came home with two transmissions yesterday. An SM420 with a 7.06:1 first gear AND a light duty Chevy NV4500. I'm not sure just yet whether it has the 5.61:1...

Found one.

I'll try to connect with him there, if I cant get to him here. I ALMOST just pulled the trigger on buying a complete '78 or '79 W350, complete with pass side drop Dana 60, but found out it didn't have an NP203.

I'll reach out to him, thank you!

Well, the actual "rock crusher" transmission (as I have been told, at least) was the Muncie 22, which was a performance transmission from the 60's. But, the granny geared truck transmission that I've also heard referred to as "rock crusher" is the Muncie SM465. It was common in the square...

Here's the connection that I'm fighting with:

Lots of work still gonna happen on this rig. 4 link in rear, 3 or 4 link up front, about to start building a full new cage and install new Corbeau front seats. My son really wanted the rear facing back seat. It's a Corbeau bench. He an my wife both like riding back there so much, that I...

Whoops, HERE it is:

Hey guys, This isn't a "WTB" ad for the classifieds. I'm at a loss. I'm at a loss! I have an NP435 Ford transmission, that has an Advanced Adapters kit, to swap it into a CJ7. SO, that means that it has a 23 spline output now, to mate to a Dana 300. I'm trying to shoehorn an NP203 doubler...

Hello all, I'm needing to find a 23 spline input shaft for an NP203 transfer case. If anyone could help me out, I'd sure appreciate it! I will also have a 27 spline Chevy input shaft that I could trade or otherwise part with.

Sounds like I need to start shopping for an NV4500!

Nice! I like that idea!

That would be an awesome find! Wonder what it was? C/K2500-3500's, perhaps?

May I ask what your final crawl ratio is? I've never had a crawl ratio lower than my CJ7 (79.45:1). I could definitely go lower!

An NV4500 would be great, being a 5 speed! I have a 4:1 + a 2:1 doubler. But, I reall6 like the low range of the first gear in the SM465! BUT, I really appreciate all of the personal experience! Would you prefer your higher gearing and overdrive, over a lower first gear?