Knocking/rattle when off throttle

[keyL200]

Hi everyone.

Got an knocking/rattle coming from the truck when its fully warmed up and off throttle. Does it in every gear, neutral, but not when i engage the clutch or throttle on under load. There's nothing worn or loose externally, the noise is def internal coming from the bellhousing/oil sump area. Now i'm thinking this is either gearbox or bottom end, but I just can't pin point it.

Checked oil pressure, perfectly fine idle and driving. Here's a video of the noise.

https://youtu.be/T5RS8wLSDtk

Any ideas? Some people have said its the gearbox layshaft bearing.

[rodeast24]

The clutch pesuure plate bearing rattles and is quite normal mine has done it for years, if you depress the clutch does it go away. looking at your video I am thinking big end play on the over run but I would get a second or third opinion, if it is the case do it as soon as as it will fail big time if you leave it

[barnstormer]

Big ends usually knock on load - not rattle on the overrun off load. If the noise is coming from the bellhousing it could be the dpf.

[keyL200]

Thanks for replies guys. So def think its either big ends, or someone suggested a gudgeon pin connecting the piston to conrod. Think i might take the engine out to diagnose. Budget is tight so not sure if i can rebuild it.