Output shaft seal replacement instructions needed

Can you please tell us which seal engine, transmission or differential?

It's a 1995 Chevrolet Cheyenne 1500 2wd 4 speed manual with overdrive with the 5.0L 305. And it's the output shaft seal on the transmission.

you will need to remove the driveshaft. this guide will walk you through the steps with the seal location in the diagrams below. Use a chisel to remove the old seal then install the new seal using a flat steel or seal installer.

https://www.2carpros.com/articles/how-to-remove-a-drive-shaft

This video will show you how to install the seal @ 8:05:

https://youtu.be/ytqXLSjHNm0

Check out the diagrams (below). Please let us know what happens.