[DeTomaso] [SPAM]Re: ZF Limits

[Arnold Pleuss]

I can remember when I had my 1st Pantera in 1975-1976, ZFs were available 
from Ford as surplus for $600.00.

Arnie  #5725
----- Original Message ----- 
To: <wdemelo at cogeco.ca>; <detomaso at realbig.com>
Sent: Thursday, July 31, 2008 9:42 PM
Subject: [SPAM]Re: [DeTomaso] ZF Limits


> In a message dated 7/31/08 2:57:56 AM, wdemelo at cogeco.ca writes:
>
>> What is the max HP/TRQ a ZF can handle?
>>
> Anything can be broken. For an OEM ZF, no one knows precisely what level.
> Ford was worried about the same thing which is why they ordered one spare 
> Zf for
> every 5 Panteras sold. And as we all know, most of those spare ZFs wound 
> up
> gathering dust until after 1984, Ford was no longer liable to supply spare
> parts, and they found their way into garages, under kit-cars and on E-Bay. 
> Even
> with the severely hot-rodded Panteras over the last 38 years, if an owner 
> changes
> the lube regularly, changes the differential ring-gear bolts to US-made 
> ones-
> safety-wired ,and refrains from screwing around with the innards of the
> assembly, it lasts well. The same unit was used in virtually all 
> mid-engined
> limited-production sportscars- Maserati Boras, BMW M-1s, the 
> Chrysler-powered
> Monteverdi and countless kit cars and engine-swao Panteras with big-block 
> engines.
> Past history:   An RBT rebuild ran behind an 800-bhp Boss 429 that was
> carefully shifted (Jr Wilson's SS racer) without issue, except when he 
> 'got major
> air' at an event -at over 200 mph- and the shock-load when the 4400-lb 
> Pantera
> landed, snapped the input shaft. Roughly the same power level in Greg 
> Esakoff's
> Pantera racer broke gear teeth regularly, but Greg is known as a very 
> brutal
> shifter. Numerous GT-40s both real and home-built run the ZF without 
> problems
> including in Vintage racing events. Pat MIcal in MA runs an intercooled 
> twin
> turbo Pantera at Pocono track events, that supposedly puts out 1000 bhp, 
> and
> I think his ZF is stock.   Dave Doddek in Chicago runs twin turboes and a
> home-bult EFI on his Pantera. He's blown multiple engines but no ZFs. So 
> it really
> comes down to taking care of a precision assembly and shifting carefully,
> rather than saying that 'its good for any use at 500 but will blow up at 
> 550'....
> FWIW- J DeRyke
>
>
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