Quote:
Originally Posted by TJ's GMC
Considering an NV4500 for my 64 1500 as well. Subscribing to this thread for updates. Mine has the Sm420 4 speed and 4.10 rear gearing. Wonderful up to 55 mph so a 5th gear would be really nice. Only problem I have with the NV4500 is the use of a hydraulic clutch. Mechanical is much easier imop. I was also considering a gear vendors OD just cause they are fun. lol
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I think the GM NV4500 may have been also used with a mechanical clutch but I think you would then need a factory GMC V6 Automatic trans adapter (hard to find) to use with the GM NV.