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speedo correcting gears 

 

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 Post subject: speedo correcting gears
Posted: Sun Jul 31, 2011 12:18 am 
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i have 3.9 diff gears going into my EB this week and some lined up for the SVO. where can i get the speedo drive gear that will correct my speedo?

cheers

 

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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 7:28 am 
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nope. you will need a jaycar speedo correcter or similar..
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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 7:29 am 
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nope. you will need a jaycar speedo correcter or similar..

although i have heard that if you use a speedo drive sensor from a xd/xf with the 23 teeth 3.23 gear this will bring the speedo pretty close to being correct due to the x series sender having a slower signal..
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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 8:29 am 
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If you give Ford dealers the information about your car, ie tyre size,diff ratio etc,they have gears to suit.

 

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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 11:55 am 
Getting Side Ways
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so many different opinions.

 

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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 12:17 pm 
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just fit a jaycar or shiftkits.com speedo correcter
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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 12:22 pm 
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Ride: 1993 EB XR8

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kwaussiekid wrote:
If you give Ford dealers the information about your car, ie tyre size,diff ratio etc,they have gears to suit.

Not with 3.9's.
TROYMAN wrote:
nope. you will need a jaycar speedo correcter or similar..

although i have heard that if you use a speedo drive sensor from a xd/xf with the 23 teeth 3.23 gear this will bring the speedo pretty close to being correct due to the x series sender having a slower signal..

You need to use the XD Speedo transducer but I cannot recall what gear is needed.

 

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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 12:37 pm 
Getting Side Ways
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Ride: EA SVO, AU2 Forte

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will try to get to Jaycar during the week

 

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Daily driver: AU2. 5 speed. 19" FG luxos. Full exhaust. Lowered. AU3 XR leather interior, converted to full power windows. 3.45 LSD. IN THE FUTURE: Tickford 6
Weekend driver: EA SVO AU motor. Built BTR. TCE 2800 stall. T76 turbo. Locked diff. On E85. approx 320rwkw. 11.5 @121mph

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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 8:12 pm 
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XD transducer, Green gear( not sure of the teeth). This will make speedo accurate. then you need a speedo corrector form Jaycor or Shift kits so the auto plays nice. If you dont it will hold gears for way to long as it looks for road speed, not engine RPM. This applies only if using an Auto.

Brett

 

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 Post subject: Re: speedo correcting gears
Posted: Sun Jul 31, 2011 9:33 pm 
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So the correct answer here is dont change the speedo gear. Leave it as-is, and your Engine/Gearbox will live to see another day. Your ECU will also do the right things.

You need to get a speedo corrector though to correct *only* the Speedo Cluster, trip meter (ifyou have it) and cruise control. Best NOT to correct the input to the ECU as its used for all kinds of things - like overrun injector control, Lean Burn cruise etc, and also Auto Trans Shift control

Nigel
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 Post subject: Re: speedo correcting gears
Posted: Mon Aug 01, 2011 8:21 am 
Getting Side Ways
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Ride: EA SVO, AU2 Forte

Location: Bendigo
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it's a manual. and i want a correct speedo so i don't get speeding fines

 

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Daily driver: AU2. 5 speed. 19" FG luxos. Full exhaust. Lowered. AU3 XR leather interior, converted to full power windows. 3.45 LSD. IN THE FUTURE: Tickford 6
Weekend driver: EA SVO AU motor. Built BTR. TCE 2800 stall. T76 turbo. Locked diff. On E85. approx 320rwkw. 11.5 @121mph

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