Castle combe again.

[red reading]

Well took the car out today for a trackday and have finally managed to break it, managed to shear the Mainshaft off at the clutch hub splines! Anyone heard of this before?

i am in contact with par about it and have a spare Mainshaft ready to fit but tbh it's the last thing I would have thought to fail, was all going very well with the few things (details) done over winter to the set up and the like, after shearing a transfer box flange, 4 cv joints previously the last thing expected was this....good job I can fix it easily but makes you wonder if the cases are that weak tbh or if the gear case explosions are more due to shock load from poor launching.

 

[MarkTurbo]

Don't think I've ever seen one break there in all my years of owning one so good effort :lol:

Whereabouts on the circuit did it let go? Coming out of a corner, down one of the straights?

makes you wonder if the cases are that weak tbh or if the gear case explosions are more due to shock load from poor launching.

I think the cases are always going to be a weak point on any high power car that gets launched repeatedly but for road/track use where they aren't being subjected to that shock loading they should last.

 

[red reading]

On old paddock bend just comming back on boost in third gear, I just coasted to the side of the track after bobbies,

 

[BBYZilla]

Really? The mainshaft on the clutch hub splines? Ive never heard of that happening :\ keep us updated on what they say

 

[red reading]

Yep, I will, need to get parts tested but tbh I don't know why it has failed yet.

 

[MarkTurbo]

On old paddock bend just comming back on boost in third gear

Think that's where i killed 3rd on my standard box at the sprint a couple years ago just before i bought Bruce's Quaife ;-)

 

[red reading]

Think that's where i killed 3rd on my standard box at the sprint a couple years ago just before i bought Bruce's Quaife ;-)

Ah so your to blame for jinx ing that corner

 

[johnny gtir]

Would like to see picture and see what they say. A good effort but a pain when its not the part you thought might brake