Here's a pic of the tag. It's a 249 case. I just noticed some yellow paint in the corner of the pic. Might be a junk yard swap from the previous owner.
How can I test the viscous coupling? It looks like a $500 part so swapping the whole thing will be cheaper if that's the problem.

IMG_20201014_134813169.jpg
Last edited by 74RALLYE; 10/14/20 02:33 PM.