[DeTomaso] ZF gears don't engage properly

[Julian Kift]

It sounds like there is enough residual drag on the clutch to prevent gear engagement, but not enough to overcome internal resistance in the gearbox to turn an output shaft/wheel. Can you get a 40 thou feeler gauge between the pressure and friction plates when the clutch is disengaged? Are you sure you have all the air bled from the clutch line?


The pilot bearing could also be dragging, I have encountered this in the past with a bronze oilite bushing or if the input shaft could be slightly damaged (easily done in shipping if not secured appropriately in a crate)

Julian

________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of Patrick HALS <patrickhals at gmail.com>
Sent: Thursday, October 5, 2017 8:24 AM
To: detomaso at server.detomasolist.com
Subject: [DeTomaso] ZF gears don't engage properly

I immediately start by apologizinge for my poor technical wording , Folks !
Here is the problem:
My mechanic has fitted a second hand ZF DS2 gearbox in a Pantera.
Everything works fine when the engine does not run, all gears engage and
disengage freely.
The clutch is new and works fine, engage and disengage. the pedal is
normal, and you can see it moving through the window in the bellhousing.
The gearlever is well centered in the tunnel in the cockpit
Strangely, when the engine runs, it is impossible to engage any gear
properly.
If you start the engine with a gear already engaged, and the clutch pushed,
it works fine, the wheel is not rotating.
If you release the clutch, the wheel turns normally, and the gear can be
disengaged normally, but a new gear can not be entered, as the teeth are
hitting each other in the gearbox
Someone told me that maybe , the oil in the gearbox was not correct, or
that the level was not sufficient .
Does that make sense ?
Thank you
Patrick
Candy 2862 ( still missing )
ADA 9628
-------------- next part --------------
   It sounds like there is enough residual drag on the clutch to prevent
   gear engagement, but not enough to overcome internal resistance in the
   gearbox to turn an output shaft/wheel. Can you get a 40 thou feeler
   gauge between the pressure and friction plates when the clutch is
   disengaged? Are you sure you have all the air bled from the clutch
   line?

   The pilot bearing could also be dragging, I have encountered this in
   the past with a bronze oilite bushing or if the input shaft could be
   slightly damaged (easily done in shipping if not secured appropriately
   in a crate)
   Julian
     __________________________________________________________________

   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
   Patrick HALS <patrickhals at gmail.com>
   Sent: Thursday, October 5, 2017 8:24 AM
   To: detomaso at server.detomasolist.com
   Subject: [DeTomaso] ZF gears don't engage properly

   I immediately start by apologizinge for my poor technical wording ,
   Folks !
   Here is the problem:
   My mechanic has fitted a second hand ZF DS2 gearbox in a Pantera.
   Everything works fine when the engine does not run, all gears engage
   and
   disengage freely.
   The clutch is new and works fine, engage and disengage. the pedal is
   normal, and you can see it moving through the window in the
   bellhousing.
   The gearlever is well centered in the tunnel in the cockpit
   Strangely, when the engine runs, it is impossible to engage any gear
   properly.
   If you start the engine with a gear already engaged, and the clutch
   pushed,
   it works fine, the wheel is not rotating.
   If you release the clutch, the wheel turns normally, and the gear can
   be
   disengaged normally, but a new gear can not be entered, as the teeth
   are
   hitting each other in the gearbox
   Someone told me that maybe , the oil in the gearbox was not correct, or
   that the level was not sufficient .
   Does that make sense ?
   Thank you
   Patrick
   Candy 2862 ( still missing )
   ADA 9628