[DeTomaso] Speed error

[Tomas Gunnarsson]

The 335/35-17 is theoretically almost exactly the same diameter as a 285/50-15. Your variables are the angle drive and the speedo itself. Check that you have the right parts before you go any further.

Tomas
----- Original Message ----- 
From: <michaelsavga at gmail.com>
To: <JDeRyke at aol.com>; <detomaso-bounces at realbig.com>; <detomaso at realbig.com>
Sent: Sunday, March 08, 2009 9:02 PM
Subject: Re: [DeTomaso] Speed error


> Thanks.  So am I to gather there is not a simple screw existing cable here box and screw this pig tail cable here where the old one went sorta deal available that retains the original gauge?  Sounds like an opportunity given the proliferation of larger wheels and smaller diameter tires.  Hmmm what would it take to make such a thing using interchangeable nylon gears to dial in any combination.  Michael in savannah
> ------Original Message------
> From: JDeRyke at aol.com
> Sender: detomaso-bounces at realbig.com
> To: detomaso at realbig.com
> Sent: Mar 8, 2009 2:24 PM
> Subject: Re: [DeTomaso] Speed error
> 
> In a message dated 3/8/09 7:08:56 AM, michaelsavag at gmail writes:
> 
>> Finally got to play with christmas present GPS tomtom 930 and the Pantera 
>> at the same time. 1oo on speedo is 92 on GPS. Tires are 245 45 17 and 335 35 
>> 17. What parts with numbers and source do I need to correct. Michael in 
>> Savannah
>> 
> Unlike U.S trannys, there is only one speedo gear known for inside the ZF, 
> outputting to the right-angle drive and the cable. To correct for giant wheels & 
> tires etc, you'll need a conversion box from a good speedo shop, or to 
> convert the Pantera to a programmable electronic speedo. Owners have done both and 
> the 91-93 Pantera 200/SI had an electronic converter attached to the ZF 
> right-angle drive and an electronic speedometer as-stock (no cable at all). Wilkinson 
> whould be your source for the factory stuff. The yellow GT5S clone I worked 
> on a year ago had a mechanical converter box for its 17" wheels- from Hall, I 
> suspect. It was about the size of a matchbox with a short cable driving it and 
> the stock cable driving from the converter to the speedometer. Good luck- J 
> Deryke
> 
> 
> 
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