i lost a snap ring from my 4l60e 700r4 its the snap ring that goes on the inside of the rear planet to hold the output shaft wondering if anyone can name the part or number.

 

If you are looking for the small Snap-Ring (Lock-Ring) that retains the Output-Shaft at the Front-Planet...

They will usually come inside of the Seal, O-Ring, Paper, and Gasket Set that would be purchased, when rebuilding/ overhauling the Transmission (from TransTec or Precision-International).
Parts in general right now are difficult to find/ obtain... the supply is very low.
Transmission Parts of all kinds have been scarce for a while now.

The GM part number is: #08654141.
However this Snap-Ring (Lock-Ring) can be difficult to find individually (especially from GM).

If you want to obtain the Snap-Ring (Lock-Ring) from GM...
-The Snap-Ring Set #24248064 contains the Snap-Ring that you are looking for with several other Snap-Rings for the Transmission (this would be the next least expensive option at $10.00 to $20.00).
-The Seal, O-Ring, Paper, and Gasket Set #19300335 from GM would be your last option (this set will be $100.00 to $200.00).

Good luck and have fun!