Woody - short answer, you can't. You can take off the side cover, everything can look OK there, then you finally take it completely apart & ONLY then can you see the most expensive parts to replace, namely the input & main (output) shafts where they meet with the roller bearing.Here is a pic of a bad one
http://pic80.picturetrail.com/VOL953/3900683/18661857/295676483.jpg
Doug





Last edited by desertdog; 01/02/2008 3:49 PM. Reason: still learning