Help..knocking from front drive shaft

[matteb63]

I have a V class 230 111 engineed ..When I lift my foot off the acelerator you can hear a knocking noise that disappears when engaging drive again... Im worried about the safty issue as I hsve to travel back to Wales with the Kids today..Anyone know what the problem might be?
Thankyou Mattt

 

[djb]

in my experiance with front drive mini, polo,golfs etc drive shafts problems first show under load and at full lock, not on the overrun.

take a quick look underneath, usually a little in & out movement is ok however if you can lift them up and down, more than .5 mm then there is a problem.

Might not be drive shaft but diff / box. how fast is the knock, does it behave differently in a different gear. is it a one time knock, or regular withevery wheel revoloution?

 

[matteb63]

every revolution with no knocking under load.or when turning ..just over run..

 

[djb]

every revolution with no knocking under load.or when turning ..just over run..

how heavy a noise? does it knock when coasting in neutral?

knock on overun engine off?

 

[matteb63]

Sorted ..Inner drive shaft to whatever it attaches to ..all the bolts where loose!
Thanks for your replys
Matt