if some of the people that claim to be rebuilding these defective transmissions..at home or where ever.were really any good..they would not even be messing with the defective junk..they would not touch it..if they were any good..they would be some where.taking care of the new transmissions that are out..when we are only getting fifty thousand-one hundred thousand miles.out of a transmission..that tells you that it is junk..my chevy conversion van..is on the third..4l60e with only 140,000..they were and are junk..
they came out with the 4l80e.to help take some of the pressure.that the dealers were going through..with so many vehicles coming in with the transmissions..gone out at low miles..they were swamped..
if you care to look it up..what is out there from GM themselves.it will tell you..about the internal oiling problem.that they had for years and that they could not correct it..the parts were not getting enough oil..
so the cheap defective parts.stripped or broke.every time that they could.they upgraded the parts..but at first.there were no up graded parts.that took some time too come about.to do a 4l60e..you got too just about change out.every part in it.from front too back..
i think it is stupid.that they.even.had the nerve..to put.electrics..in to the transmission.like that..i think it is the craziest thing ever.to have a vehicle.that is controlled by electronics -and not the driver any way..and i got two of such vehicles.
but i went out and bought.two old trucks..to back them up.because.something all ways.breaks on them.electronic vehicles are just money pitts..the new vehicles.have digital dashes.you have a little fender bender.and it knocks out that digital dash.they total your vehicle.
so what does that tell you.is the vehicle mfg,s in with the insurance corporations..totaling vehicles..so you have to go buy another one..loose what you have in your vehicle.i wonder..you know insurance corps are not going to stand by and let something be built..that they lose money on..
so i assume that they are making money..off of totaling out the vehicle..
I know its not common enough, I know of at least 2 4L60-E's that have well over 150,000 miles on them, and those are OEM off the lot builds. One is in a 2002 Chevy Truck, and I think the other is an 03 or 04 Tahoe.
Again, the 4L80-E did NOT come out to replace the 4L60-E. The 4L80-E came out for the answer to applications like 3/4 and 1 ton trucks that normally ran a Th400 to now run an overdrive transmission. Do you realize what would happen if you ran a 4L80-E behind a V6 that normally has a 4L60-E? The thing would be a sled and its mpg would be horrible. The V6 motor would spend more effort just to operate the transmission than it would to propel a car.
That parts in a 4L60-E are NOT cheap and defective. There are parts that are of bad design. Many of the parts go bad due to a domino effect. One part goes bad, it causes others to go bad. So if you redesign one part, then other parts a good enough just as they are.
Without doubt, electronics IS the way to go. Technology has come a very long way, and without it, vehicles wouldn't have the mpg, the lower emmisions and the horsepower/torque they do without electronics. Do you think top fuel dragsters are concerned about emissions and mpg? NOPE. But they use electronics now too, as does Nascar. Why??? Because it improves effeciency and horsepower.
Many cars are totalled by a fender bender. Not because it can't be put back together at a reasonable price, but because insurance companies won't take the liability of the repair. Do you think they care? No they don't. Our insurance premiums take care of that. You can take a $60,000 SUV, it has a minor rear end collison and hits a car in front of it, the driver side air bag deploys, the SUV is now totalled. Might only be $5000-$8000 to repair it, but its totalled because the insurance co is not takiing liability for the air bag repair. So its gets sold to a dismantler who will probably fix it and resell it. The dismantler is the one who makes a killing.
If you've ever taken a look or considered the theory and operation of an auto trans, its quite fascinating. Even manual transmisison have moving parts, and they also wear, like thrust washers and snychros. 
