how hard to replace valve body in 4L80E

[JadXtreme]

How hard it is to remove the valve body from my 2000 4L80E? I am pretty mechanically inclined and just removed the tranny and put a new torque convertor in myself. Just was wondering if I needed any kind of specialized tools to remove it. My valve body is likely the suspect that I've been hunting down causing my tranny to not allow the torque convertor to fully lock up in 4th gear. Everything else has been either replaced or tried.

I've replaced the torque convertor, had the pump booster rebuilt, and replaced the TCC PMD soleniod. Even with another computer in the truck, it does the same thing. The tranny only has about 90K miles on it now and I'm flabbergasted that I have been unable to identify the problem 100%.

I want to replace the valve body with a remanufactured one. I would also like to install a transgo kit or shift kit if it would improve the tranny. Just wondering what to look for when pulling the valve body and all.

Also, what years remanufactured valve bodies should I look for? Does it matter what engine it is supposed to be for?

[NEUMANNZZ]

shouldnt be too hard. undo wiring and bolts,etc. pretty straight forward with simple hand tools.

[JadXtreme]

I might get rained out tomorrow or wednesday. If so, I'll go to this tranny shop local and spend some time there. Only thing left it could be is either in the valve body or something electrical.

[TUG TOY]

I would like to here the results because I havind a similar problem.

J

[NEUMANNZZ]

ensure no atf fluid is in main wire connection to transmission(disconnect the wires to see), if so replace wire harness and connector in the transmission.

[2500ak]

Very easy, in fact the hardest parts is getting the t-case cross member out of the way. If the trans is already out it should be short and sweet.
Here's my old 4L80e Transgo install thread.

http://www.fullsizechevy.com/forum/general-discussion/tech-articles/395731-installing-transgo-hd2-4l80e.html

Putting the valve body back on can be a little tedious. The intermediate servo will want to fall out of the case so gum it up with Vaseline. The check balls sit on top of the separator plate so once again, use lot of Vaseline. If you can get someone to hold the servo up in the case with a long screwdriver that makes it a lot easier, otherwise you kind of have to jam it up then put the VB back on before is slowly falls out of it's bore.

If you've got the trans out and upside don't think any of these things would be a problem.

As to the shiftkit install? The only really tedious parts are the parts where you have to drill for the pressure relief valve. Just make sure the drill goes strait down and you won't have a problem. Use a drill press if you have one, that would have made it a lot less stressful.

Get torlon (imidized plastic) checkballs like the ford trans use, they'll extend the life of the sep plate and they'll seal faster. They only cost a few dollars, cheap insurance.

[transbuilderguy]

are you sure your trans isnt kicking back to third and not the converter unlocking I learned something this week and may be what you are dealing with however it would only be a kicking out of 4th issue not TCC