Anyone broken an LSD diff output shaft before?
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We were competing at Harewood at the weekend, not been there before and it was very wet, got one dry-ish run at the end of the day and managed a 67second pass (not sure how good that is) but jolly god fun.

Anyway, during practice, we broke the output shaft on the LSD, not heard of this before, any one else bust one?

It's been in 3 or 4 seasons and done a maximum of a few hundred miles.

Cheers to Carl for offering one out of the Twinny (sp?) to get us going again, although I sent Ben home in the end (200 mile round trip) to get a spare from his car.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Mmmm Hardy Spicers :)

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

I've never heard that they've broken, but then again, I've never heard anyone broken what you've done either. Pots are said to be less power sapping mechanicly.

hardy spicers have the bigger output shaft (so i've been told)

pot joints however do have less rolling resistance.

I have seen JKD shafts twisted at the splines on the hardy spicer end and also the same shafts sheared in half. That was on a Stage Rally. So anything is possible

fair play buddy, good effort! maybe something to get cryo treated?

Team Racing

hell mate that's a good job, might be the first to have done one of them.

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It is an interesting failure. It has failed on the pot-joint side, which is basically the same size as every other pot-joint output shaft, be it on a standard diff, cross-pin, whatever.

they're £65 each too!

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

crickey, what dif is it?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

i really dont think this should have happened, its good nothing else suffered from it, but i would def be onto minispares to raise this issue

*edited to add*

also....

because of where the break is, looking at one of my JKD outputs, its a one piece affair, and the splines end just before the flange.

the ones MS sell seem to be a 2 piece affair, with the pot joint side spline grooves undercutting it slightly...

Edited by joeybaby83 on 7th Jul, 2008.

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

well done lads, 67 secs on a dry-ish unfamiliar track is very good! phil shorts mini that graham now owns used to run 64s up the hill at harewood...

I ended up at Prescott hillclimb on Sunday, took the DON up on a bar of boost, OH MY GOD!

Good fun though!

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

That failure is all wrong for a driveshaft if i'm looking at it right. It appears way too brittle - almost like its had too much case depth in heat-treat.
I'm suspicious to be honest.

wil A 67 seconds PASS IS VERY QUICK

a 1380 n/a with a 45 and 649 on slics only does it in.......78 seconds

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Ben was driving when it broke. He was accelerating out of orchard through the farm and it went.

Considering how wet it was the amount of torque going through it at the time was lower than say at the start on a sticky day.

As for times, we started in puddles and I ran a 79, then a 74 in slightly drier conditions, then the last run of the day was a 67.14. Considering it was still a bit damp and it was completley different grip levels than any other run I was very happy.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Glad you got it sorted, and yes that is a good time.

Was trying to get over but ive been very busy.

Rick

ps Tom, how long did it take you to get to pescott

Edited by cossierick on 7th Jul, 2008.

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Rick, I went to Prescott from my mums which is only 15 min away, at a guess though from Rotherham it is probably a comfortable 2 1/2hr run.

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Perhaps it was jsut an un-noticed flaw in the part? weakening the part as a whole? Not a satisfactory answer as there is no practical solution to prevent it hapening again however :(

i had a similar failure of my driveshafts, im no metalurgist but i did some light reading and came to the conclusion that the twisted, jagged features were signs of a fatugue failure where it sheers a small portion of the shaft eatch time it is loaded up.

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Denis O'Brien.

We lost one of these the weekend before last. It was bran new Item s I had fitted it the night before, the driver of the car took of from the line got a lot of wheel spin then caught the curbing then lost all drive, I was sure it was because he hit the curb and the massive juddering that went trough the shaft as he wheel spun on the curb caused it to fail maybe not could this be an inherent flaw in these spigot's ??
regards,
Paul.