Knocking or grinding possibly from transmission

DALEG1980

MEMBER
1991 FORD F-250
4.9L
6 CYL
4WD
MANUAL
180,000 MILES

First I replaced the clutch with clutch kit. Have new motor and transmission mounts. Replaced universals. So last couple weeks I have been getting this like knocking noise and I can feel it at my feet. The funny thing is that it does it when moving and at a full stop. I am thinking it may have something to do with a bearing. When the clutch is in neutral or in gear still makes that sort of knocking sound. At high speeds its very consistent and loud. When drifting down a hill in gear with clutch peddle down or neutral same sound. I have a hard time trying to catch the sound when parked but can't figure out where it is coming from, but it seems to be right at the oil pan and transmission. What could it possibly be?

7 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

Can you upload a video of the noise so I can hear it?

This sounds like an internal engine noise.

Roy

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Thursday, November 7th, 2019 AT 1:33 AM

DALEG1980

MEMBER
11 POSTS

I can never catch the sound when I get out it is luck of the draw. But to let you know it is not effecting the truck. Everything is still the same. Drives fine, runs fine, no bogging, or nothing. It's hard to explain it is like a faint knocking not like when oil runs out in motor. Almost sounds like grinding but only at times mainly at high speed. If you have questions please ask. Thanks.