Can we talk 4l80e?

[01spirit750]

I wanted to see if anyother members were running a 4l80e? (Late model GM overdrive version of the turbo 400 but with electronic controls)

Do you like it?

I picked one up at the local pick n pull and plan on doing a full rebuild.

This will replace my turbo 400.

Yes, I will need to purchase the standalone computer.

[tmoble]

handy with a soldering iron at all? see this, save money:

http://www.diyautotune.com/catalog/gpio-board-c-77.html

you would need the basic GPIO kit and the megashist application kit. Less than $300. you can buy these already built too.

[solidaxel]

I have a 4L60E wich I have been driving for a few months and it is wounderful, all gears 1st is low and 4th is high the other two just happen!
The computer tells it everything with input from the throttle shaft and the driveshaft tells it the output.
The only decision is weather you want to go forward or backwards!!
The 4L80E is much larger than the 60 so make sure you have the room.
Do you have the computer or are you using a stand alone, I had to purchasas a Comp U Shift computer which he said would do everything and everything is included in the kit.
Plug and"Play" 12VDC and a ground, & tach,simple.

[vin63]

Only thing that will live behind my Pontiac that made 585 ft-lb (went through a few 700s). Here's what I use:

http://www.optishift.com/

http://www.abbott-tach.com/cablex.htm

[hotrod1]

spirit750, here is an exert from my build.


1st of all buy the book for 20 something dollars (ebay). Study it well before you start. It was like foreign language to us. A lot of parts in a small area.

Good web sites:

http://www.performancetrucks.net/for...d.php?t=396429 Good build. This guy did a good job explaining.

https://www.wittrans.com/Schematic.a...smission=4L80E Good blow-up diagram

http://www.transmissioncenter.org/4L...Up_Diagram.htm Another good blow up diagram and a good company to get parts from as well

We rebuilt it with Alto Red clutches and Kolene steels. I ended up getting them from Idaho Transmission Wharehouse. I ordered #34661F filter for $5, SP3400GXX Master rebuild kit with alto parts and gaskets/O rings. $369. Talk to Rebecca. By the way, Alto has good phone support. Call them if you have a question about the install of their product.

Also installed Transgo HD2 lit from Summit. Transgo has a VIDEO install video. http://www.transgo.com/video.php If you have any issues they have good phone tech support.

Before doing this we scrubbed the case and wire wheeled it to get it clean. Painted it with three coats of POR 15 (great stuff).

The biggest suggestion that I have is that you take pictures of EVERY SECOND OF THE DISASSEMBLY. Important to know where everything goes, like separator washers between the components. Set up all components on the floor on cardboard in the sequence that they were removed. MORE PICTURES. You can always delete them later.

For reassembly we hung the case from the ceiling joists in the garage so the opening is facing up. Used tie down straps. Worked well. There will be times that you need to set the case down so have a good table to put it on. Hope that you feel strong because you will need it.

We will be able to tell if we did a good job when we hook it up to the motor (in about 3 years?). Keep your fingers crossed. Need it to hold 650hp. Should not be a problem.