Tasmin Clutch

[Kerberos]

Not sure this is the right forum for this but...

... clutch was slipping at Cadwell and by the end of the day I struggled to get up the hill to the paddock. On stripping it down the friction plate is worn on the flywheel side but the other side is brand new, the copper rivets holding the lining on are still gleaming.

Now my mechanical understanding is limited but I am struggling to understand how the clutch could semi work (it didn't drag and although I wasn't the fastest around Cadwell I did get round). My limited understanding is the friction plate is sandwiched between the flywheel and the clutch and should have 50% of the spring pressure on each side of it because it is loose on the splines.

Just wondering if anyone else had ever known this on a Tas, before I pay my entry fee for Rockingham assuming another clutch will resolve the problem. (I had done a 1/2 day at croft and all Friday at Cadwell on the dodgy clutch so a quick blast round the car park may not show up any problems)

Cheers Mick

[Graham]

Sounds odd? is the clutch moving ok on the input splines?

We always ran a stock road car clutch in the taz with no problems

G

[Kerberos]

Yes it moves free. It is a standard clutch, I think. Standard Cosworth T5 box, The only thing I could think was that the bell housing was too short and that the plate was up against the shoulder at the back of the splines on the gearbox shaft but then the clutch wouldn't clear. I'm totally baffled.

[heightswitch]

Kerberos said:

Yes it moves free. It is a standard clutch, I think. Standard Cosworth T5 box, The only thing I could think was that the bell housing was too short and that the plate was up against the shoulder at the back of the splines on the gearbox shaft but then the clutch wouldn't clear. I'm totally baffled.

Have you got the friction plate the right way round?

[SubRosa]

May be worth checking the spigot bearing in the end of the crank. I had a slightly different problem a few years back on a 240Z where the clutch would start slipping to the point of not driving at all and then suddenly be fine. Two clutches later and I discovered the spigot bearing was worn badly on one side and was moving in the crank causing the input shaft to wander and misalign the clutch. Different symptoms but worth checking while you have the box out.

[Kerberos]

The friction plate is the right way round.

Spigot bearing sounds like a possible cause, the car drove up the trailer later which was very strange. If a worn spigot bearing gives intermittent clutch slipping that could be worth looking at.

Thanks for your thoughts.