Main Shaft Gear

Any body know what the number on the gear means p2 e 32 --- 18 8 46 -- k2

 

This came out of my t15 transmission with a dana 20. Can I use it with a t15, or is there another gear one for a t15

 

It came outta what transmission ?
Unless it came from a T14 it will be perfectly usable if it was original in your the transfer case.
No need to change the mainshaft gears unless you swap transfer cases or the gears spline count is wrong.

 

The gear must match the transmission splines and tooth count and pitch of the transfer case gears being used. In your case if you are reusing the original transfer case matching that gear and it is the correct spline count doesn’t matter which transmission you use it on except the T-150. The T-150 gear is machined with a seal surface where others are not. If it came off a T-15 it will go on another T-15.
18-8-46 are the pertinent numbers for cross reference as shown above.