[fairwayhit]

After reading Cliff's book, It seems like I would need a drum/36 element sprag, a rebuild kit, bearing kit, a shift kit, and a few tools to properly rebuild the Th350. All said, I would have $700-$800 in the rebuild and still no overdrive.

So I started to kick around just getting a 4L80e. I realize that I would need a controller and harness, shorter driveshaft, adapter plate, etc. Since all of that adds up, I was thinking I would just get a used transmission and see how it goes. After all, the stock unit would probably still be just as strong as a hopped up TH350.

When I started looking for a good used 4L80e I quickly realized that there aren't a lot of low mileage units out there. Most of them come out of pickups with well over 100K miles on them.

I did see a couple low mileage candidates out of Bentleys. However, I saw online where someone said that these transmissions were substantially modified by Bentley, but I can't find out in what way.

So, are all 4L80e transmissions basically the same, or are there some you should steer clear of?