DeTomaso Mailing List: August 98, Message #250

The "long throw" slave cylinder is manufactured by Pantera East (813)
381-1151.

---------------------------------------------------------------------------------

barryharward@pmsc.com wrote:

> PROBLEM: When car gets warm it won't go into reverse (grinds) even when
> shifting to 1st or 2nd first.
>
> CAUSE: Obviously the transmission gears are spinning.
>
> WHY:  Figure either a>pilot bushing sticking causing transmission input
> shaft to spin when clutch disengaged or b>clutch disc is still spinning
> from contact with the flywheel and pressure plate.
>
> WHICH:  Clutch disc clearance when cold was around .018".  Adjusted shaft
> on slave cylinder out a little over a turn.  This left clearance at .030"
> but no free play (i know this causes the throwout bearing to not disengage
> but i'm trying to diagnose the problem here).  After adjustment all gears,
> including reverse, engage nicely even after the car gets warm.
>
> ANALYSIS:  Another Pantera owner here in town runs .017" clearance (says
> that the spec) and doesn't have a problem.  On my car though, I'm
> thinking that the metal (flywheel/clutch disc/pressure plate) gets hot,
> expands and causes the clutch disc to spin.  .018" is damned little
> room.
>
> SOLUTION:  Good news here (if analysis is correct) is i don't have to pull
> the transmission to replace the pilot bushing.  Searched the archives and
> it sounds like this longer throw slave cylinder might be the solution.  My
> understanding is that this is a smaller diameter cylinder which causes the
> same amount of fluid transfer to move the throwout bearing further in and
> therefore provide additional clearance while retaining adequate freeplay
> when the clutch is engaged.
>
> QUESTIONS TO THE GROUP:
>
> 1> Is the analysis sound?  Have i missed anything?
> 2> Who sells these slave cylinders?
> 3> I'm fairly new to the car and for all i know it's got the long throw on
> it now.  The current slave cylinder can be seen at:
>
> http://www.conterra.com/bhill/1lgengine.jpg
>
> TIA,
>
> Barry
> far far away from those great CA tech sessions