vibration noise?????

[mr.garrett72]

help f-350 crew cab 325000 miles standard tranny truck hits 50mph start getting a loud hmmmmming noise press in on clutch it goes away always same noise at exactly 50mph seems to lighten up after 55mph what could this be took it to several mech. one said clutch the other said clutch is finr because it doesnt slip just replaced a u joint that had slack in it but noise still there??????:

[mr.garrett72]

ok it's getting worse started noticing it at 35mph still no clue as to the reason also getting a load squell like a bearing going out when the truck is at a crawl but still no for sure indication where it's coming from

[GoFastPadre]

It sounds like a throw out bearing to me, but you may already have it fixed

[mr.garrett72]

ok well its at the shop getting a new clutch i'll get it back tomorrow lets hope that was it funny there's no slippage so it has to be the throwout bearing i'm also having the rear main seal replaced while there in there

[mr.garrett72]

well I replaced clutch fly wheel a u-joint $1300.00 and it's still doing it where should I look now. I'm starting to get P/OFF So someonr please help

[oasis04]

Did you also replace the oem fly wheel? probable source of vibes.

[mr.garrett72]

yes I replaced the fly wheel , clutch , pilot bearing , throwout bearing , pressure plate , and a u-joint