ChevyFarm
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Posts posted by ChevyFarm
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4 years ago I built a '70 El Camino (don't worry, I also have a '71 M/C SS454) with a 9:1 454, mildly warmed up. Lots of fun. Originally stuck a 200 in it with the 3:31 rear end to see if I liked the gear split with the 200R4 ratios. It worked good -- for about a hundred miles. Then the trans grenaded. Now going to do a 4L80E with a 3000 stall, and switch the gears to 4:30. Using a U.S. Shift controller, and paddles if I want to. Not done yet, but it can't help but work better. Won't blow up, and that's what counts. Should just jump off the line.
Transmission Choice Question
in Drivetrain Tech
Posted
And one more thing -- if you choose a 4L80E you'll need much more gear, because you'll be 2.66 in overdrive with the 4L80E. Waaaay too high a gear even in a highway cruiser. The converter will never couple, or even come close to coupling. And I don't think you built 550 hp to be a highway cruiser.