[Mgs] B/GT gearbox mystery

[Paul Hunt]

If you mean the clutch pushrods, if that appeared to fix it then 
something else was wrong that was fixed in the process.

All the slave pushrod does is position the slave piston in the slave 
cylinder.  The MGB system is self-adjusting which means that when you 
release the clutch pedal the clutch cover springs push the release ring 
back, which pushes the release bearing back, which pushes the release 
arm back, which pushes the slave push-rod and piston back, which pushes 
fluid back into the master reservoir.  The length of the slave push-rod 
doesn't directly affect that.  If it's too long it can bottom the piston 
in the cylinder and prevent the clutch from being fully engaged, which 
can cause clutch slip.  If it's too short fluid displacement from the 
master can push the piston out of the end of the cylinder.

If the master push-rod is shorter than it should be then the pedal 
footpad is lower than it should be, it doesn't travel as far as it 
should before reaching the floor and you get a low biting point.  That 
can cause grinding when selecting reverse, which was covered way back, 
and there has been no response to that or any of the suggestions.  If 
that push-rod is lengthened the pedal pad sits higher and can travel 
further, which can push the pressure seal to the end of the cylinder and 
damage it.

PaulH.

On 07/10/2024 15:37, dave northrup wrote:
> Try adjusting the pushrods,  making them longer.  I know it sounds 
> crazy,  but i had a similar problem and that fixed it.   People on 
> this list even said don't do it,  but i did it anyway.   Now it works
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/mgs/attachments/20241007/a1eac80f/attachment.htm>