That's what I was thinking. I even had a picture ready for reference just in case.
Glad you solved the problem.
Is now a good time to replace the rear main seal?
Attachments
Dowel Pin.jpg (64.22 KB, 56 downloads)

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."