RE: Speedo Gear color code ??

[george smith <bt6t4@xxxxxxxxx>]

You hit it on the I think Dan.I ordered a gear for my
late 60's 4 speed today. I'm getting a 34 tooth and
I'm running 3:54 gears.
--- Dan McCormack <mcwheels@xxxxxxxxxxxxxx> wrote:

> 
> Well I checked both my 63 and 64 Plymouth FSM and
> this gets even more 
> confusing. It seems like manual & automatic and V8
> and 6 cyl. trannys 
> use a different number of teeth for the speedo gear.
> I'm not sure what 
> the difference is between the manual and automatic
> but the 6 cyl. tranny 
> has 7 teeth on the output shaft and the 8 cyl.
> tranny has 8 teeth on the 
> output shaft. It shows the number of teeth needed
> with a 700 x 14 tire 
> which is 26.80" in diam. (sound familar Rich?) and a
> 3.91 rear end 
> (manual V8 tranny) as a 19 tooth dark blue but...
> there's also a sub 
> note that says with this combo to use a .9058:1
> ratio adaptor. (Mopar 
> made ratio adaptors???????) It shows a 21 tooth gray
> for the 3.55 rear 
> end. I guess the 21 tooth is as close as your going
> to get unless you 
> can find one of those ratio adaptors or use a
> slightly taller tire.
> 
> This sure is a lot more confusing than the 66 and up
> gears which I'm 
> familar with. I discoverd years ago that if you have
> a stock height tire 
> of about 27" that the speedo gear teeth (66 and up)
> will match the first 
> 2 numbers of the rear end ratio. For example a 3.23
> uses a 32 tooth gear 
> and a 3.91 uses a 39 tooth gear ect. If you have
> smaller dia. tires you 
> need more teeth and if you have taller dia. tires
> you need less teeth. 
> That last statement should be true for the 65 and
> older gears too.
> 
> Dan
> 
> 
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>
> 
> 


George



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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.