It seems, as if I have no good luck with my car at the moment...

Today I took part at a dragrace and droped the clutch at about 5000rpm in my classic with 6 speed gearbox and ACT full face streetrace disc and heavy pressure clutch.
First it made a noise I was used to, the reardiff knocked on the underside of the chassis, but then there followed a noise I never heard before, something like an "explosion" ( I canīt decribe it better) and the revs went up, but no boost/power was made. The log showed only 1bar of boost in first gear at 7500rpm, normally it makes 1.7bar.
The clutch the slipped extremly and even off boost I was not able to get the car moving as normal.
I had a clutchdisc that was on the limit before and it always slipped only in the higher revs and with a bit of boost setting in.
This time itīs even off boost and I doubt this is really the clutch damaged...
I can drive the car around, but I drove home on a servicecar, so I hope there is not much damaged to the parts.
Might it be possible that the gearboxshaftsealing is damaged and the oil causing the "slipping" clutch or may the release/pilotbearing be damaged and the pressureplate is not able to engage the clutch due to this?

My mechanic is on holidays for the next 2 weeks, so I would need to know whatīs damaged to order the parts, as the next dragday is in 3 weeks! ;(

Please let me know, your opinion!
Many many thanks!
Greets
Markus

 

Could be a snapped drive shaft as this will cause the centre diff to slip which feels like clutch slip.

 

Oh that sounds fine in my opinion!
But should not there be a noise if one of the shafts is broken?
Will have a look at the car!

 

My mechanic said it might be the clutch or even the middlediff. ;(
The propshaft, reardiff and driveshafts seem to be fine!

What clutch would you recommend for dragstarts?
As said, I used a extreme duty clutch with a full face organic disc made by ACT and it rated to 500ft/lbs, so about 600NM...

 

Mechanic took a look at all parts and found out, that the reardiff is shot!
Thatīs no big deal for me, as I wanted to install the R180 in the next days and have hubs, shafts and diff with LSD in my garage!
The diff is broken inside and it even makes no noise, seems to be a straight hairlinecrack in the visco unit.