I just finished changing the gears in my rear end from 3.23s to 3.55s and I want to make my speedo accurate once again. Do I have to buy a new speedo gear for the tranny? I was told that I may be able to make adjustments within the tranny to accomodate the rear end ratio change...I'm not sure it thats true or not. If a new speedo gear is required, where can I get the correct one and how do I know what I need (# of teeth)? Any help here would be greatly appreciated!

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1965 Valiant 200
170 C.I

You will need to change the gear that goes on the trans end of the speedo cable. First thing what year is the trans? Then will need to know the size of the tire, to go along with the gear ratio.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

My transmission is a 1965 Chysler 904 3-speed and my tire size is 25.4 inches.

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1965 Valiant 200
170 C.I

Ooofff, that makes it harder. The 65 and older speedo gears are harder to find. No source of NOS, just used. Will have to look up the color/number of teeth, you need. Then someone may have one laying around.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Hello,

That ole Chaarlie knows his s...tuff. I think I have your gear in my stash and NO forseeable need for it. PM me need to know your tranny and gear ratios in 1,2, 3 Gears are about $15, BTW

rock
'64 d100

In order to figure out which gear you need, we need not only the rear gear ratio but also the tire size you're running.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Alrighty then.....I have 3:55 gears in my rear end and I have 25.4 inch tall tires. What speedo gear to I need? Where might I be able to pick one up? Any help would be greatly appreciated!

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1965 Valiant 200
170 C.I

Arrgh...this'll be easier to figure out by far if you'll please state your actual tire size rather than its diameter.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Sorry Dan....I misunderstood you! My actual tire size is 205/70/R14.

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1965 Valiant 200
170 C.I

Gotchya. You need a 19-tooth, dark blue speedo drive pinion.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks SlantsixDan!

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1965 Valiant 200
170 C.I

I have a blue one but how do you count the teeth? I get 21-- but on the moparts info it should be grey for 21 --- blue = 19-- and this piece is definately not grey., Lawrence

What is the dia of the gear? The 65 gear should be about 1 inch in dia, the 66 up gear is about 1 1/2 inch maybe a little larger. You might be looking at the late model gear. The color/tooth count may be different, between the years (eary/late).

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

this is correct for push button style-------- my 62 fsm lists
700-14 2.76--ratio- 17 orange
3.23 20 lt blue
650-14 2.93 16 lt purple
3.31 18 dk purple
3.58 20 green
650-13 2.93 17 natural
3.23 19 dk blue
3.55 20 green
All of these are with a 7 tooth output shaft

64 fsm
650-13 2.93 17 orange
3.23 19 dk blue
3.55 20 green
700-14 2.76 16 brown
2.93 16 brown
3.23 18 dk purple
3.31 18 dk purple
7 tooth output(6cyl cars) above list

700-14 2.76 17 orange
2.93 18 dk purple
3.23 20 green
3.55 20 green
8 tooth output(8cyl cars)

How do you correctly count the teeth-- I used the flat edge starting with a molded casting # & counted all of the teeth for my # 21-- the unit is definately blue in color-- but I do not match the above listings, Lawrence

It's been a while since I've looked, but I thought there was a tooth count molded in to the body of the gear. Maybe I'm thinking of something else.

To count the teeth on other gears and such, I just mark one and count it as number 1 then continue around the gear until I get back to the marked one. Just be sure to not count the first one twice.

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David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.