http://video.aol.com/video-detail/tc...008/3845253249

 

I'd never buy a TCI product. Just don't have much faith in their products.

 

never tried one of them. just thought it very interesting that they converted a 4L80e to a six speed......

 

ya man, watched the video, looks cool besides having to use those paddle shifters. kinda limits what you can do with it

 

i wonder if someone could get a 80e program in one of these trucks to control for 6 speeds. sounds like a headache!

 

This has been done before. Believe it or not, Jet (remember jetchip.com?) sold a valvebody kit that made a 4L80-E six speeds back in the late 90's. It never was popular because the conversion made it manual-shifting if I remember right.

Technically, a 4L80-E has always been capable of eight forward ratios because it has three planetary gear sets.

Stock 1st = Forward engaged
Stock 2nd = Forward engaged & Intermediate engage
Stock 3rd = Forward & Intermediate engaged, Direct engage
Stock 4th = Forward & Intermediate & Direct engaged, Overdrive engage

I can only guess they're doing something like this:
1st = Forward engaged
2nd = Forward engaged, Overdrive engage
3rd = Forward engaged, Overdrive disengage, and Intermediate engage*
4th = Forward & Intermediate engaged, Overdrive engage
5th = Forward & Intermediate engaged, Overdrive disengage, Direct engage*
6th = Forward & Intermediate & Direct engaged, Overdrive engage

* Note that third and fifth are both now dual-event shifts. Stock, a 4L80-E has no multi-event shifts - a major reason why they shift so solid.

 

Hmm, it would be awesome to swap the valvebody and have a 6 speed if they can make the stock computer control it and the stock shifter. I would be down because cruising at 75 and turning 2600 isn't good

 

hell....go with the standalone and ill take the paddle shifters too...

 

With as many blown up TCI converters as I have seen, I wouldn't buy a TCI product.

 

It doesn't look that promising to be able to retrofit an 80 with a new valvebody because they said they needed to changed the gearing