Broken Drive Shaft :s

[89CAL]

Hey

So I've broken the passanger side rear drive shaft about 5cm from the outer CV joint..... But I'm not sure why, I thought it would handle much more power then what I'm pushing out (Only running stock turbo still.... 195rwkw)

Just wondering if anyone else has heard of this happening. I have replacements lined up from another skyline but Just want to know if I should be more mindful of how easy they can break or if i was just unlucky with this drive shaft.

Other info.. I have:

- NPC 10" sprung button clutch

- 195rwkw

- 275 tyres on 19" rims at the rear

if any of that helps, I relise that I have a little bit of grip and a fairly strong clutch if that had anything to do with it

And yes I'll admit, I'd had a crap day at work and I broke the drive shaft doing a clutch dump

Thanks

Callan

[89CAL]

Pic tells the story....

[turboedsloth]

i think the combination of the wheels being that wide and the clutch dump would have done that. I've seen an old school holden panel van snap a tailshaft the same way.

[89CAL]

Ive taken the part of the driveshaft off the diff in order to get it home.. The way its broken is a bit puzzling because it is a very clean straight break... Pic attatched:

[Dobz]

It snapped at the weakest point at the very base of the radius that's machined on the shaft. It looks like a normal sort of break on a drive shaft after a big clutch dump, the massive shock through the driveline gives a clean snap. Just be thankful that broke instead of your gearbox.

[89CAL]

yeah I'm pretty happy about what broke compared to the alternatives

but im still a bit confused as to why it happened. I dont really do clutch dumps often, I was just in a shit of a mood last night. Figured with my kind of power it wouldnt be an issue but I guess the mixture of wear and shock loading was enough to do it.

[Dobz]

The thing that does it is all the grip you have at the rear, if you had skinnier tires all the force from the clutch dump would've gone in to wheelspin but with as much grip as you have that force has no where to go. The whole driveline gets massive stress and the weakest link snaps.

[89CAL]

Yeah I just thought the driveshafts weren't the weak link lol oh well. Could have been worse. Mainly just wanted to see if anyone else had done this in their skyline because I've never really heard of them snapping.

Just means I'll be more careful in the future. Least it didn't happen at the drags or in the middle of nowhere.

I also had someone tell me that axle tramp may have weakened the shaft/drivetrain, and since I still have stock shocks I guess the extra squat from the car wouldn't have helped when it snapped. Appreciate the comments. So far seems like it was just one of those things I pushed 1 step to far

[our12]

Hi.

Looking at the picture with LHS painted on it would indicate it has been changed before. Probably has been abused in the past and the inevitable happens. They are a consumable item after all.

[89CAL]

I pulled it out to get the outer cv replaced but yeah car could have been thrashed in japan