[DeTomaso] zf oil

[John Taphorn]

Jim

I've heard that overfilling may lead to high internal pressures and 
overheating.  I suspect that it would need to be ridiculously overfilled to 
cause that to happen.  We recognize that the case is vented to release 
pressure.  I struggle to imagine how the oil could heat up so fast and it's 
volume change so drastically that the air could not be displaced fast enough 
through the vent hole and cause the passage of least resistance to be 
through the seals.  I would believe it in a closed system; however, I would 
suspect that it is more well intentioned, yet false Pantera lore.

I would hypothesize that even overfilling by a quart would cause no negative 
issues.

JT
----- Original Message ----- 
From: <pantdino at aol.com>
To: <detomaso at realbig.com>
Sent: Friday, April 17, 2009 11:54 PM
Subject: Re: [DeTomaso] zf oil


>
> My understanding is that overfilling will lead to too much pressure 
> building up when the transaxle gets hot, which can blow seals and cause 
> leaks.
> As I recall you have to allow time for the fluid level to equilibrate to 
> make sure there is neither too much nor too little in the box.
>
> Jim Oddie
>
>
>
>
>
>
>
> -----Original Message-----
> From: John Taphorn <jtaphorn at kingwoodcable.com>
> To: Christopher Kimball <chrisvkimball at msn.com>; detomaso at realbig.com
> Sent: Fri, 17 Apr 2009 9:00 pm
> Subject: Re: [DeTomaso] zf oil
>
>
>
>
>
>
>
>
>
>
> Chris
>
> I would guess it is better to slightly overfill verses underfill. 
> Although, I
> doubt there is much chance of overfilling unless you were able to hang the 
> car
> from its tail.  Regardless, 3.5 is ample.
>
> The consequence of running the ZF cover plate down is that the output 
> shaft
> rather than the input shaft gets bathed in oil.  The input shaft has first 
> gear
> cut into it and most of the syncros and bearings.  Ideally, it would be 
> bathed
> in oil for running and storage protection.  I opine that a higher oil 
> level
> provides it better protection.
>
> One opinion
> JT
>  ----- Original Message ----- 
>  From: Christopher Kimball
>  To: jtaphorn at kingwoodcable.com
>  Sent: Friday, April 17, 2009 10:17 PM
>  Subject: RE: [DeTomaso] zf oil
>
>
>  But I don't want to overfill it, do I?
>
>  Chris
>
>
>
>  > From: jtaphorn at kingwoodcable.com
>  > To: chrisvkimball at msn.com
>  > Subject: Re: [DeTomaso] zf oil
>  > Date: Fri, 17 Apr 2009 20:06:23 -0500
>  >
>  > Chris
>  >
>  > If your ZF is a sidefill, jack up the rear to accommodate a larger 
> fill.
>  >
>  > JT
>  > ----- Original Message ----- 
>  > From: "Christopher Kimball" <chrisvkimball at msn.com>
>  > To: "Pantera List Serve" <detomaso at realbig.com>
>  > Sent: Friday, April 17, 2009 7:38 PM
>  > Subject: [DeTomaso] zf oil
>  >
>  >
>  > >
>  > > Had my bolts safety-wired and the ZF checked out. I just refilled it 
> with
>  > > oil and am checking; is just under 3 quarts the right amount?
>  > >
>  > > I had the ZF positioned in a level orientation, and that's about when 
> oil
>  > > started coming back out of the hole.
>  > >
>  > > Thanks!
>  > >
>  > > Chris
>  > >
>  > >
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