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Author Topic: Dark Blue Trimatic Speedo Gear  (Read 12002 times)
Glenn 'Stinky' Stankevicius
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« on: March 21, 2010, 08:37:07 PM »
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Like the title says, my speedo is reading 89-91% slower that what it should be with a white speedo gear (20 teeth) so according to my calcs I need a dark blue gear with 22 teeth  Undecided
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jack_fc
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« Reply #1 on: March 21, 2010, 08:55:01 PM »
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don't suppose you'd settle for a grey one?  Wink Grin
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« Reply #2 on: March 21, 2010, 09:11:53 PM »
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Does more teeth mean slower speedo on that gear ? 

Perhaps look at changing the other gear too.  I think more teeth on the other gear will make the speedo faster.

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Peter.
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« Reply #3 on: March 21, 2010, 09:23:17 PM »
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Does more teeth mean slower speedo on that gear ? 


 I too am thinking that more teeth will essentially mean a slower turning speedo cable, making it slower than what it is now..... Stinky, can you re check your calculations.

Keith
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Glenn 'Stinky' Stankevicius
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« Reply #4 on: March 21, 2010, 09:47:15 PM »
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don't suppose you'd settle for a grey one?  Wink Grin

Not bloody likely! That one would have no teeth  Tongue

Peter and Keith, that would be the case  Embarrassed (I'm blaming the hangover Roll Eyes)
So when my speedo reads 55mph(88kmh) I am actually doing 50mph(80kmh), 111% average, my speedo is spinning too fast so I need to slow it down.

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FC427
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« Reply #5 on: March 21, 2010, 10:05:59 PM »
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Yellow is 24 teeth  might do the trick to calibrate your speedo Stinky ....FC427.....
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Glenn 'Stinky' Stankevicius
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« Reply #6 on: March 21, 2010, 10:27:30 PM »
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I had yellow previously and that was wrong, went to white on the recommendation of the car parts store guy  Roll Eyes and it's obviously too far down the scale.
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Paul In Ireland
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« Reply #7 on: March 21, 2010, 10:37:08 PM »
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How hard is it to change these as my FE reads low and my FC reads high - I think swapping them might work? Or are these teeth cheap to buy?

Sorry for the hijack.....  Wink
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« Reply #8 on: March 21, 2010, 10:54:25 PM »
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I had yellow previously and that was wrong, went to white on the recommendation of the car parts store guy  Roll Eyes and it's obviously too far down the scale.
Stinky sorry I read wrong thought you already had a 22 tooth  Embarrassed Embarrassed....FC427....
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As I lay rubber down the street I pray for traction I can keep, but if I spin and begin to slide please dear god protect my ride
Glenn 'Stinky' Stankevicius
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« Reply #9 on: March 21, 2010, 11:31:02 PM »
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How hard is it to change these as my FE reads low and my FC reads high - I think swapping them might work? Or are these teeth cheap to buy?

Sorry for the hijack.....  Wink
Not sure for the 3 speed manuals, but for the trimatic it's a matter of removing one little bolt and pulling the speedo cable out of the trans, slipping the old gear off and putting the new one on, slip it in and bolt it up.
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« Reply #10 on: March 22, 2010, 07:07:16 AM »
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Glenn,
This link might help you find what you want.... 
https://rsp-secure.com/rarespares/default.asp?part_number=sg1

Cheers,

Graham
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pedro
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« Reply #11 on: March 22, 2010, 07:46:09 AM »
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Pretty sure I've got one of those somewhere Stinky, I'll have a look a bit later and let you know.
                      Pedro
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« Reply #12 on: March 22, 2010, 06:26:45 PM »
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Stinky, try this site to check you need Dark Blue, if you do I have one in the shed for you if Pedro doesn't have one
Matt
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« Reply #13 on: March 22, 2010, 06:28:13 PM »
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Will probably help if I add the link?

http://codes.oldholden.com/Speedo/

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« Reply #14 on: March 22, 2010, 11:38:03 PM »
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from memory dk blue i think is 3.08 13" wheels and i think 3.36 14"
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Glenn 'Stinky' Stankevicius
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« Reply #15 on: March 22, 2010, 11:50:06 PM »
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Thanks for the link Matt, only problem is that I don't know the colour of Gearbox Drive Gear, pretty sure I need the Dark Blue though.
Pedro, pull your digit out  Tongue
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pedro
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« Reply #16 on: March 23, 2010, 11:07:35 AM »
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OK digit removed and part found Wink, sorry I got sidetracked yesterday I've been building tables at a mates place for his slot car layout, I have a blue 22 tooth and a yellow 24 tooth, you are welcome to them if you want.
Paul, you used to be able to buy adaptors for changing the speedo readings on early Holdens, they just screwed in the back of your speedo same as the cable and then you fitted the cable to them, doubt that you could still buy them new but someone might have one.
                     Pedro
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Paul In Ireland
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« Reply #17 on: March 23, 2010, 11:27:25 AM »
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Pedro, If I have one reading high and one reading low, I could swap them over and it might work or are they all the same? How hard is it to change them?


Thanks
 Cool
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« Reply #18 on: March 23, 2010, 11:36:12 AM »
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On the grey manual boxes they are internal and I'm fairly sure they are all the same Paul, that's why the aftermarket cable ones were made, I used to have a couple of them and they were pretty common years ago, try putting up a post asking for one or check evil-bay you never know, I'll have a look but I'm 99% positive mine went on cars ages ago.
                    Pedro
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« Reply #19 on: March 24, 2010, 01:51:11 PM »
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Hey Stinky, getting tired of standing here with the cold air blowing on my digit Tongue Tongue Tongue Tongue
                                       Pedro
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