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Speed Sender Unit (Wheel cogs) 

 

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 Post subject: Speed Sender Unit (Wheel cogs)
Posted: Thu Feb 07, 2013 3:43 pm 
Getting Side Ways
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Age: 58

Posts: 1027

Joined: 13th Sep 2010

Ride: Ford Falcon AU 2000 Series II

Location: Eagleby
QLD, Australia

Does the less amount of teeth on the speedo sender unit cog increase the speedo reading?

My old gearbox from a Ford AU 2 has a Pink gearcog, 19 teeth.

The current gearbox I am using at present is from a Ford Fairlane, colour and teeth unkown as I have not pulled the bolt out to check. At 100kmh on the GPS reads 95Kmh on the speedo unit.


The old gearbox reading 100kmh on the GPS unit reads 105Kmh on the speedo.

Tyres used is 215/60R16

Based upon the different tyres as opposed to standard factory specific tyres would the Pink 19 teeth speedo cog be the correct one to use?

Cheers
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 Post subject: Re: Speed Sender Unit (Wheel cogs)
Posted: Thu Feb 07, 2013 3:54 pm 
Moderator
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Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

yes, the less amount of teeth the higher your speedo will read...

i would say the 20 teeth is correct for your car..a 19 tooth gear is for 2.92 ratio which was last used in ea and eb1

have a look in this link, it shows what gear is for what ratio..
documents.php?d=30

havnt we had this question recently???
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 Post subject: Re: Speed Sender Unit (Wheel cogs)
Posted: Thu Feb 07, 2013 11:06 pm 
Getting Side Ways
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Age: 58

Posts: 1027

Joined: 13th Sep 2010

Ride: Ford Falcon AU 2000 Series II

Location: Eagleby
QLD, Australia

Troyman,

Thanks mate, we probably have discussed this before but I may not have asked the right question in context before.

Cheers
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