Re: Rear-end gear ratios

[Bill <Y1TopBanana73@xxxxxxxxx>]

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Sure-Grip rear: Turn the tire 1 time and count the driveshaft revolutions.
Open rear: same thing but you double the number you get.

My 65 Coronet has 2.93's in it. I had heard about this ratio but never
actually seen it until I got this car.

Don't forgert about SWAG: Scientific Wild Ass Guess\

Bill M
65 Coronet 500 'vert

On Wed, Feb 25, 2009 at 12:31 AM, MO ( Steve Mick)
<micher@xxxxxxxxxxxxxxx> wrote:
>
>  I believe this method only works with a sure grip rear end- because of the
> spider gears  in a non-posi.  You can use this method if both tires are on
> the ground and you roll it straight ahead( or
> back)......................MO.............sw  iowa
> ----- Original Message ----- From: "Herb" <zephyr9900@xxxxxxxxxxx>
> To: <1962to1965mopars@xxxxxxxxxx>
> Sent: Tuesday, February 24, 2009 6:44 PM
> Subject: Re: Rear-end gear ratios
>
>
> I can tell you a EWAG (Educated Wild A$$ Guess) or probably just a WAG way
> of telling.  Lift the rear off the ground & rotate a tire one complete turn
> and count the rotations of the drive shaft and keep track at the end.  Three
> & 1/4 turns is 3.23.  Three & 1/2 turns is 3.55.  Four & 1/2 is 4.56 and so
> on and so on!  I hope this helps.  Unless it has been worked on or rusted
> off, it should have a tag on it somewhere with the ratio on it.
>
>  
> Herb
>
> 1959 Coronet 325 Poly
> 1963 Fury 2D/HT 6.1
> 1963 Sport Fury Convertible 361
> 1970 Challenger RT 440
> 1999 Durango SLT 5.9
> 2006 300-C Heritage 5.7
> 2008 SRT-8 Magnum 6.1
> St. Louis, MO.

> -------Original Message-------
>
> From: mikelj@xxxxxxx
> Date: 2/24/2009 6:02:48 PM
> To: 1962to1965mopars@xxxxxxxxxx
> Subject: Rear-end gear ratios
>
> I am curious what the gear ratio is for the rear-end of my '64 Dodge Polara
> 500.  I can't find anything about that on the window sticker, build-sheet,
> tag, etc.  It seems like it is around 3:00, and I am sure they didn't have
> many choices in the mundane 383 2 bbl. TorqueFlight setup.  Anyone know?
> Mike in New Mexico

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