4L80E behind a 5.3

[clinebarger]

Originally Posted by Heavymetl

As for power robbing, in theory, sure. Over on ls1tech there's multiple threads of track results after switching from 4l60e to 4l80e and there's no change. Several went faster due to the more favorable ratios. Bottom line....if a 4L80E fits, in my mind there's no reason NOT to run one.

I never stated anything about E.T's or Dyno numbers, I was talking about what they rob on take-off and Part Throttle in general, IT IS Noticeable, I have swapped 4L60E's for 4L80E's several times, Of course as BoostedC10 stated a good Stall Converter that gets the engine into the meat of the Torque Band helps a lot, Then More Power & Displacement/Boost makes my point moot.

The OP is going for a Cammed 5.3, A 4L60E will feel Better/Faster at Part Throttle where MOST driving is done. Especially if the cam is too big (Easy to over-cam a 4.8L/5.3L)

If I slapped a Allison 1000 in your truck....You would notice it