I have a problem - any suggestions

[Andy C]

Buggar - OK last night I was driving home - about a street away from my house I started to notice a knocking sound when I took my foot off the throttle - as soon as I put my foot back on it went away. 30 seconds later BANG and no drive - I moved it from H to HL and could move - slowly still with the knocking sound - luckily I only had to travel half a block where the truck is now languishing in my driveway awaiting mechanical assistance tomorrow.

This came out of the blue - no previous indication - no transmission slippage - no leaking fluids - nothing.

Any suggestions as to what I can tell them that the problem may be would be appreciated - so as not to make me look like a muppet when it comes to mechanics - which I am.

It is a 97 6.5TD with 52000 miles on it.

Thanks guys.