Quote:
Originally Posted by bigblockv6
Mine being a 4wd with 4.56 gears that came stock with 33 inch tires. In my experience the truck would run like a bat out of **** if I shifted from 2nd to 3rd at 4000 rpms, that really launced and carried the momentum for the 3rd to 4th shift and had no problem keeping up with a friends 96 GMC 350 with fuel injection. Things will be different now with the 478M, I made one mistake in the build not realizing until later that the hoollow stem sodium filled exhaust valves snap from over reving, those are going to have to come out.  |
I've never had mine up to 4k yet. 3k seemed high enough. lol Its a cruiser for me so I like to be easy on it. Yeah, my 305 would out pull a 350 if we were loaded down. The way it pulled my load of manure. Wow! lol I'm still impressed. 55 going up a grade at 1/4 throttle.
Quote:
Originally Posted by jagarra
Well with the 420 tranny, I guess we should determine what we are calling 1st, granny or 2nd? Since I start out in the gear up from granny I will say that is 1st. What I have noticed is that I can shift from 1st to 2nd at a lower RPM and not have it lug than I can from 2nd to 3rd. Seems to like the shift to high gear when I am going around 35 MPH. I have a 3;54 rear end and the tires are about 29".
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I usually start in 2nd if I not loaded down. Course...I don't have a 3.54 ratio either so I understand starting in 1st. I have the 420 as well.