driveshaft. massive failure. help needed.

[mungo1973]

Yep, I check my as regularly as I check my oil, just got back from Snowdonia with 4 half way out that got checked prior to leaving home ... must get some more loctite, or new lock washers

[croc]

It may pay to check/service the CV joints too if the bolts keep coming loose.

I have a theory that when the CV joints get worn, ie pitted, the extra vibration loosens the bolts.
You may have used an impact driver sometime in the past? Sort of the same idea!
This might explain why bolts that have been secure for 25+ years suddenly start coming loose.
Just a theory but it did happen on my 1985 van.
Been no more loosening since replacing a pitted CV joint that side.
Good luck!
jon

[mungo1973]

It may pay to check/service the CV joints too if the bolts keep coming loose.

Good luck!
jon

Yep I kind of have this underlying feeling this is why mine work loose

[croc]

Another small point on the driveshaft issue is that these are 'friction' joints.
That is, the drive load to turn the wheels should not be taken by the bolts but the bolts are there to clamp the CV joint to the flange and then the friction between the two is what takes the turning force.
It follows that should some of the bolts come loose- whatever the reason - then the driving load starts being taken by the bolts and they then shear off, they cant possibly take the forces imposed.
The bolts are high tensile for this reason, to press and force the two parts together.
Well thats my rant for a Tuesday night!!
All the best everyone, keep your powder dry!
jon