When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The old seal was stuck in the housing, I carefully removed it and installed the new filter. One of the 13 mm housing holes is striped which is way the previous owner had a longer 13 mm bolt up in there. I'm not leaking any fluid, but will tap the hole to the next larger size.
The fluid change appeared to have fixed the slip I was getting at 40 mph.
I'm hoping the problem was the filter, although the fluid looked okay the filter was dirty.