so I have a 3 cyl perkins gas and I'm replacing the rear main seal. but here's my issue. I bought a rear main seal from yesterdays tractors, I pull the old rear main seal out and soak the new pieces. in my factory service manual it specifically says DO NOT TRIM THE SEAL. but I start pressing the new rear main into the housing and it hangs way out from the end. so I check the new seal against the old seal and the new seal is 1/4" longer than the old seal. I called yesterdays tech line and they have no idea what to tell me. so they told me to ask you guys. please help I have a tractor blocking the only open bay in the shop and the company that sold me the parts (that I waited a week and a half for) has no clue if it's supposed to be trimmed or if they sent me the wrong seal all together. they swear this seal is supposed to be a direct replacement but it's obviously not. and yes I have the seal bottomed out in the seal housing.