[DeTomaso] transaxle
Guido deTomaso
guido_detomaso at prodigy.net
Tue Nov 10 19:46:25 EST 2015
You say you hear a clunk while stopped a light. Since the ring and pinion aren't turning while the car is stopped, I'm not seeing the connection between the symptoms and ring gear bolt issues.
FWIW I discovered a bolt head stuck to the drain plug magnet many years and few miles ago. When I took it all apart, many bolt heads were missing, PO's must have drained out those heads years ago, and some of the remaining bolt heads snapped off easily with a wrench.
This was all pre-digital camera for me, unfortunately, I have some film camera pics somewhere though.
And there were no symptoms, before and after feel, sound exactly the same.
GD
From: Richard Greenblum <Richard at richardgreenblum.com>
To: tcabanski at tencom.com; detomaso at poca.com
Sent: Tuesday, November 10, 2015 2:40 PM
Subject: Re: [DeTomaso] transaxle
Tom,
Does the car rock back and forth a long way while in gear? Mine did,
and it unfortunately turned out to be a very, very rare diff housing
failure. Mine cracked, and I never mistreated the transaxle (no
dropping the clutch, no drag racing).
Richard
Austin, TX
From: DeTomaso <[1]detomaso-bounces at poca.com> on behalf of deTomaso
List <[2]detomaso at poca.com>
Reply-To: "JDeRyke at aol. com" <[3]JDeRyke at aol.com>
Date: Tuesday, November 10, 2015 at 4:31 PM
To: <[4]tcabanski at tencom.com>, deTomaso List <[5]detomaso at poca.com>
Subject: Re: [DeTomaso] transaxle
Sometimes, broken bolt-heads will stick to the drain plug magnet or
come out while draining the ZF- which slould be done yearly! Note
you
run the risk of destroying your ZF if one of the broken bolt heads
gets
caught in the ring & pinion mesh. At the very least, the bottom
cover
will be cracked as the bolthead squirts out at high velocity. At the
worst, the whole case will open up like a walnut.... In a recent
Newsletter, there were photos of an owner who found EIGHT broken
bolts
(out of ten total). This has been a well known problem since the
Pantera was still being built. Mangustas were factory safety wired
but
very, very few Panteras.
The two 11-1/2" long cross-bolts through the bearing side-plates and
the lower cover keep one from removing the lower cover while the ZF
is
mounted in the car. And even if it was somehow removed, removing
sheared ring gear bolts with no heads and properly torquing new
US-made
bolts in place, then safety wiring them all the while on your back
under the car, is not an easy task. Remove the ZF and do this on the
bench.
-----Original Message-----
From: Tom Cabanski <[6]tcabanski at tencom.com>
To: detomaso <[7]detomaso at poca.com>
Sent: Tue, Nov 10, 2015 1:31 pm
Subject: [DeTomaso] transaxle
Have always heard an occasionally clunk when I'm waiting at a stop
light
with the car in neutral.
Thought it was a bad universal joint, but
checking them seems to show
they are good & tight.
I now think that
the ring gear bolts are loose or that one or more of
the bolt heads may have
sheared off.
They have not been safety wired.
Is there an easy way
to confirm?
Look for shaving on the bottom drain plug on in the gear
oil?
Can you remove the anything while it is in the car to confirm?
Tom
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-------------- next part --------------
You say you hear a clunk while stopped a light. Since the ring and
pinion aren't turning while the car is stopped, I'm not seeing the
connection between the symptoms and ring gear bolt issues.
FWIW I discovered a bolt head stuck to the drain plug magnet many years
and few miles ago. When I took it all apart, many bolt heads were
missing, PO's must have drained out those heads years ago, and some of
the remaining bolt heads snapped off easily with a wrench.
This was all pre-digital camera for me, unfortunately, I have some film
camera pics somewhere though.
And there were no symptoms, before and after feel, sound exactly the
same.
GD
__________________________________________________________________
From: Richard Greenblum <Richard at richardgreenblum.com>
To: tcabanski at tencom.com; detomaso at poca.com
Sent: Tuesday, November 10, 2015 2:40 PM
Subject: Re: [DeTomaso] transaxle
Tom,
Does the car rock back and forth a long way while in gear? Mine did,
and it unfortunately turned out to be a very, very rare diff housing
failure. Mine cracked, and I never mistreated the transaxle (no
dropping the clutch, no drag racing).
Richard
Austin, TX
From: DeTomaso <[1][1]detomaso-bounces at poca.com> on behalf of
deTomaso
List <[2][2]detomaso at poca.com>
Reply-To: "[3]JDeRyke at aol. com" <[3][4]JDeRyke at aol.com>
Date: Tuesday, November 10, 2015 at 4:31 PM
To: <[4][5]tcabanski at tencom.com>, deTomaso List
<[5][6]detomaso at poca.com>
Subject: Re: [DeTomaso] transaxle
Sometimes, broken bolt-heads will stick to the drain plug magnet
or
come out while draining the ZF- which slould be done yearly! Note
you
run the risk of destroying your ZF if one of the broken bolt
heads
gets
caught in the ring & pinion mesh. At the very least, the bottom
cover
will be cracked as the bolthead squirts out at high velocity. At
the
worst, the whole case will open up like a walnut.... In a recent
Newsletter, there were photos of an owner who found EIGHT broken
bolts
(out of ten total). This has been a well known problem since the
Pantera was still being built. Mangustas were factory safety
wired
but
very, very few Panteras.
The two 11-1/2" long cross-bolts through the bearing side-plates
and
the lower cover keep one from removing the lower cover while the
ZF
is
mounted in the car. And even if it was somehow removed, removing
sheared ring gear bolts with no heads and properly torquing new
US-made
bolts in place, then safety wiring them all the while on your
back
under the car, is not an easy task. Remove the ZF and do this on
the
bench.
-----Original Message-----
From: Tom Cabanski <[6][7]tcabanski at tencom.com>
To: detomaso <[7][8]detomaso at poca.com>
Sent: Tue, Nov 10, 2015 1:31 pm
Subject: [DeTomaso] transaxle
Have always heard an occasionally clunk when I'm waiting at a stop
light
with the car in neutral.
Thought it was a bad universal joint, but
checking them seems to show
they are good & tight.
I now think that
the ring gear bolts are loose or that one or more of
the bolt heads may have
sheared off.
They have not been safety wired.
Is there an easy way
to confirm?
Look for shaving on the bottom drain plug on in the gear
oil?
Can you remove the anything while it is in the car to confirm?
Tom
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