Thread: GMC v6 5 speed
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Old 08-10-2021, 05:01 PM   #7
MusicMan70
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Re: GMC v6 5 speed

Matt,

I did not do the 5 speed but, I did a New Process MY6 NP440 4 speed overdrive. I followed the article from Classic Trucks which was written by Brad54 (I think that's his Name from the forum).

It bolted on just fine. I only had to have the input bearing turned down and have a new driveshaft made. It replaced my SM420.

The overdrive is .73 and pretty well suited to the V6 I feel.

They can be tough to find and you need to get a complete unit with the shifter and rods and mounting bracket.


Another possible option on a 5 speed is the AX15

http://www.67-72chevytrucks.com/vboa...highlight=ax15
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