I did my first oil change on my 52 1/2 ton and replaced the filter with a NAPA FIL1080, which appears to be a generic replacement filter according to many posts here.
The filter that was in there when I got the truck looks similar except that it has a stand off on each end:
It seems to keep the filter in a specific location in the canister and clearly stops it from flopping around:
The new filter does not have these standoffs so, consequently, it sits much lower in the canister. It obviously could potentially flop up when I go through over a bump:
Is this the right filter for my truck? Does this matter that it flops around? I could just cut some spacers out of brass pipe, I guess, to keep it in a similar location, if it makes a difference.
Also, the previous owner really had the wingnut on top of the canister cranked down way too much, it seems. Come to find out that the gasket does not quite fit right and he was compensating for it. The new gasket isn't much better.
What does everyone else do to alleviate this problem?
I could just carefully trim a millimeter from the edge to make it fit properly. I'd hate to crank it down as much as he had it.