My first transmission build is a 4L80e. This was a Marketplace purchase said to be in ok condition but the fluid smelled a bit burnt and lots of metal on the magnet in the pan so I tore it down. Direct Clutches were burned and broken. I'm reassembling now with the help of youtube and I noticed that I have a 2 piece Sun Gear Assembly with the lower gear being a larger diameter than the top gear, the lower gear must be inserted into the Output Planetary Gear Set from the output shaft end (back end) unlike the stock double gear that can be inserted from the top. So I have an aftermarket Output Carrier with custom Planetary Gears to mate up with a large diameter Lower Sun Gear. The Top Sun Gear appears to be stock in diameter. The Output Speed Sensor Ring is welded to the Output Carrier. I've searched Google to try to identify these parts so I at least I know what I have and to find documents, assembly instructions. I've haven't been able to find anything! The transmission is 2003 model, and I am beginning to think the aftermarket parts I have were discontinued. Anyone seen anything like this?

Lower sun gear and planetary gear. I searched the numbers on this and nothing!

 

You have a 2.75 RATIO GEAR set aftermarket like this https://www.summitracing.com/newsand...Mq3D4L99uREPPr and yes they are still made https://www.mytruckpoint.com/product...57-second-gear Though I am not sure if anyone offers individual pieces for them.

 

Thanks for that information!
Interesting...po said this came out of a hot rod but it seems more likely a drag racer. I might ditch them for stock parts. None of the parts are shown in stock and Summit doesn't have a listing for 4L80e parts. TCI only lists 91-97 case where as my case is a 2003.

 

if in good shape list them for sale bring good money