Quote:
Originally Posted by nitrorocket
This is where I stand at this moment. I have 3 people that will trade an entire T56 setup for my trans. Sounds like the stock T56 will hold all my power, but I can NEVER power shift. I t would allow me to do everything I want to, but. Down the road the option to power shift will cost me about $1000 bucks. I would have to do some work to get it in.
2 guys have a 4l80 with just a mild performance rebuild, Will go right in but will not do a standing mile. But would be nice with my LS1 pcm...
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That assessment is exactly accurate. As for the 4L80E swap you will gain better control over calibration as compared to you TH400. In either case, your standing mile is best achieved with the trans in 3rd gear (not OD) and a gear splitter hanging off the rear. That will also shorten your driveshaft--which is a very good thing at overdriven RPM.
If it helps, Mark Bowler makes electronics that will gear change (actuate electric shift solenoids) and gear split (actuate GV) a 4L80E from my paddle shifter. So you get a six speed with the shifter in 3rd (D) for racing use and an eight speed for economy use (when the shifter is moved to 4th OD). That won't help you accomplish all of your goals today, but it gives you something to shoot for. 4L80E and stock pcm now, Gear Vendor and Bowler electronics down the line.