4l60e or 4l80e ecm?

[Len Sabatine]

   Mike , appears you've got the bases covered , match parts = Harness, 
controller and power train
  and you're in business. A point to consider = 4L80E weighs in @ minimum 
100+ lbs heavier than a
  4L60E and consumes 20+ Hp more to operate. 4L80 E has input / output 
speed transducers , 4L60E
  has speed output only , gets input speed from engine. Gear ratios = 
4L60[E]  3.06 , 1.62, 1.00, .70
  4lL80E , 2.48 , 1.48 , 1.00 , .78. There's much to consider in the 
combinations vs Engine , Vehicle
  profiles. There are internal wiring differences between the 2 , 
Xmissions. Choose wisely.
   Len

>one i have here is a 16147060, that came w/ the 454 and 4l80e. the one with
>the 4l60e is off a 99 5.7 vortec engine, dont have it here to look at the
>part #.
>
>mike

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