I’m working with a 94 GMC 2wheel drive 1/2 ton with a NV 3500
I have the trans out of the truck and I have another NV 3500 sitting in the garage as well. I’m trying to figure out what trans to put back in?
They look the same but after taking the shift towers off they are slightly different.
Maybe one is better to use than the other?
The first pic is my spare trans with part number 8680835
The second pic is the one from the truck with part number 18564.


I have the trans out of the truck and I have another NV 3500 sitting in the garage as well. I’m trying to figure out what trans to put back in?
They look the same but after taking the shift towers off they are slightly different.
Maybe one is better to use than the other?
The first pic is my spare trans with part number 8680835
The second pic is the one from the truck with part number 18564.
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