I have a turbo set with close to a 1000 hp at the wheels with a t56... I want to switch to a auto but hate the idea of turning 3k at 55 mph, but i know the th400 will handle that kind of power, what are my options? can a 4l80e can used if it is manually shifted or will it have to have a stand alone tcm? Or can a 4l60e stand up to 1000 hp

 

a very close friend of mine has a t-t t/a with the same hp . he went thru 4 4l60e,s in his car . he is now usin a 4l80e in it . if your gonna go in and do the swap do it right man

 

10-4 thanks man, I didn't think a lt1 pcm would run a 4l80e, anyone else wanna chime in,,,

 

Manual valve body TH400 with a Gear Vendors (0.78:1) overdrive helps. The GV will handle 1,000HP.

http://www.injuneer.com/images/photo.../DCP02954a.jpg

 

The gear vendors is a great idea. I would run the 4l80e. With either one it would be thousand times better than the 4l60e.

 

thanks for the help, the th400 seems to be the way to go looking at the price of a built 4l80e,

 

But....................if you don't want that 3000rpm at 55mph then you'll need overdrive. Which means 4l80e, 6l80e, or as Injuneer said a th400 + a GearVendors OD unit.
There is NO cheap reliable way to way to get 1000hp from the motor to the wheels and have OD too.

 

If I had to pay full price for the GV, I wouldn't have bought it. I got it "slightly" used (by George Baxter in his 1,125HP 30th SS convertible) for about 1/2 original cost.

The GV also comes with a hefty weight penalty. I'd guess it weighs about 40-50#. I should have weighed it first. Will require a very short DS, and a custom DS loop. In my case, it eliminated the space for my previous Y-pipe, forcing me to run a new dual exhaust.

 

sweet! that was a great deal I'll keep an eye out... I still what it would it would take to run a 4l80e on a lt1... it might be too much trouble