Front Drive Shaft Update

[Zimm]

He was friction welding.

 

[ADVAW8S]

How much heat play a role? If your driving at 85mph versus 60? Can this attribute to early breakdown of the boot?

 

[Zimm]

How much heat play a role? If your driving at 85mph versus 60? Can this attribute to early breakdown of the boot?

Rubber generates heat as it flexes, but I would think the grease in contact with it and the rest of the metal parts would act as some sort of a heat sink. I don’t see heat in and of itself being the make or break factor.

 

[Dokatd]

How much heat play a role? If your driving at 85mph versus 60? Can this attribute to early breakdown of the boot?

I have used temp paint to verify we aren't exceeding max temps. We aren't even close if the boot stays on.

 

[Clark Kent]

Old mate who was helped out by IA with a replacement driveshaft at the ferry terminal in Melbourne recently made an interesting comment. He speculated to his partner that they had been driving on a lot of dirt and gravel roads and must have flicked a piece of gravel into the CV mouth and it got pinched between the boot and the CV lip at the bottom. Of course he's guessing but it's not improbable. He'd done a lot of miles under the same driving conditions and then got a failure. It could easily be another pattern fatigue failure of the boot from flex cycling, heat, etc. Or, he could be right. I'm just throwing that in because it hasn't been mentioned and it's another plausible reason why a hot soft boot could go from hero to zero very quickly.