I was reading some old posts about this a while ago, and was wondering if anyone had gone through with this swap? If so, what all did it intail?

Thanks!

 

You would do this swap cause the 4L80 has more parasthetic power loss then a lighter duty 4L60?

 

Huh? Can you clarify what you are trying to tell me...

A fully build 4L80E is good to 1200hp or so. A 4L60E is good to maybe 750hp. Big difference. Granted the 4L80E has a shitty 2.40:1 1st gear, a $600 low gear set gives you about a 2.78:1 1st gear which isn't too bad.

 

What i'm saying is The 4L80E trans is bigger and would have a heavier rotating mass then a 4L60 trans. I'm sure a 4L80 trans can be built for 1200hp but who is gonna run that much power in a truck anyway. I don't know why you would wanna swap a heavy duty trans for a light duty trans unless it was for weight.

 

I don't see how a fully race-prepped 4L60E will hold ported/polished heads, decent cam, and a MagnaCharger. You are talking well over 500rwhp maybe more.

I'd rather have a trans that can take the abuse and keep on running and not break. That way if I feel the need for more power (which I am sure I will) it will take it.