Speedo/Odometer recalibration for larger tires? (1 Viewer)

[r2m]

This is for my 2013 GX 460, premium with navigation.
So in my search for recalibrating my speedo/odometer for my 34.9" O.D. tires, I can't find anything in our 150 series forum. Even in ClubLexus I can't really find anything difinitive.
I'm looking for a:

• hack
• add-on module (any products?)
  
• going through the on-screen display
• or??

My speedo is about 9.5 percent off. At 60 mph on the dial on the dash, my phone's GPS reads 65 mph.

 

[HitchCrack]

I have been told you can have scan gauge display the correct speed based of new tire size. I have a SG but haven't played with that part of it yet.

 

[r2m]

I have been told you can have scan gauge display the correct speed based of new tire size. I have a SG but haven't played with that part of it yet.

Wouldn't just using a GPS app on my phone work and be the same thing? I have a great wireless charging mount for my Galaxy Note 8 that I could use.

But it would still be nice to have the O.D. be correct also. I re-geared my GX when I added the lockers and that didn't correct the speedo.
When I put 35" BFG M/T's on my 1998 Landcruiser, it was all wacked out also until I added the front locker and re-geared the front and rear diff's. Then at 70 mph on my speedo, my actual GPS speed was about 68 mph. I was able to live with that.
You can find photos of my LC on the 100 series forum, if interested.

 

[TX GX460]

I wouldn't recommend this just for the speedo function, but the ARB Linx product includes a speedometer function. If you are looking for an all-in-one product for controlling lockers, accessories, and also correcting speedometer you might want to check it out. Home - ARB Linx - Vehicle Accessory Interface

 

[r2m]

I wouldn't recommend this just for the speedo function, but the ARB Linx product includes a speedometer function. If you are looking for an all-in-one product for controlling lockers, accessories, and also correcting speedometer you might want to check it out. Home - ARB Linx - Vehicle Accessory Interface

Just checked out your link. Very cool!
Just checked out the price. Very expensive!

 

[TX GX460]

Just checked out your link. Very cool!
Just checked out the price. Very expensive!

Agreed. Consider it an alternative to a SwitchPro or SPod with additional functionality. Not cheap, but it has some unique and useful features.

 

[LTSR]

This is for my 2013 GX 460, premium with navigation.
So in my search for recalibrating my speedo/odometer for my 34.9" O.D. tires, I can't find anything in our 150 series forum. Even in ClubLexus I can't really find anything difinitive.
I'm looking for a:

• hack
• add-on module (any products?)
  
• going through the on-screen display
• or??

My speedo is about 9.5 percent off. At 60 mph on the dial on the dash, my phone's GPS reads 65 mph.

This is what you're looking for:

Universal Speedometer Signal Interface

I have used this successfully when I swapped in a chevy motor into my mazda. I had a friend drive my car while I was holding a GPS device while I programmed the unit with my speedometer. You will need to track down the speedo wire and splice into it.

 

[r2m]

This is what you're looking for:

Universal Speedometer Signal Interface

I have used this successfully when I swapped in a chevy motor into my mazda. I had a friend drive my car while I was holding a GPS device while I programmed the unit with my speedometer. You will need to track down the speedo wire and splice into it.

This looks very promising!
But... I need a FSM that shows where all the wiring is. I don't want to be Willy-Nilly cutting and splicing wires and fry my computer or electrical. I'm a mechanical engineer and so I just get by with electrical.
I found one FSM but it is not really a "how-to" type of manual.
If anyone out there knows where to get a PDF of a thorough FSM, feel free to drop a link or post a copy!