diff ratio change. speedo correct! yer i know pls read

[Cuzzy69]

spoke to marks 4wd adapters in vic. this model im told will work on 4 speed auto. Part Number: MFKSGI-5E
https://www.marks4wd.com/mfksgi-5e.html

About $250 bucks. will try soon. as for now moving the needle downwards.. eg pull of needle and preposition it at below zero by about 2cm it reads 65 at 60.. 80 at 80 87 at 90 etc.. bit of a guessing game below 60 but should help a few out. so basically it under reads below 70 and over reads above but very close.. i have the 3.89 diff and 255/40/17 rims at back. very close to stock diameter. the needle was about 2cm lower than standard on the s3 dash and a small self tapping screw used to stop the needle from falling into the plastic shroud below it. you will need to pull out the dash insert and split it open to do this.. very easy. at least now at most legal speeds i got a fair ideal of speed as before it read so high it was to hard to guess. all the best guys hope it helps a bit.

 

[MACE]

Did you end up solving this Cuzzy?

 

[Cuzzy69]

Did you end up solving this Cuzzy?

I have been informed that marks 4wd adapters can supply one with a guarantee to work. price around $250.
https://www.marks4wd.com/speedo-correction.html
will get one when my l67 is finished. cheers

 

[delcowizzid]

The Dakota digital Speedo corrector is only about 85-100 bucks

 

[Cuzzy69]

The Dakota digital Speedo corrector is only about 85-100 bucks

i can only find them for around 200? any place u know cheap

 

[gtrboyy]

vdo speedo corrector still available?

That is what we used to use when jaycar item tanked

 

[07GTS]

vdo speedo corrector still available?

That is what we used to use when jaycar item tanked

yep still have them but prices have gone up, vdo just use Bolec elec ratio box

 

[MACE]

Thank you for the info, please let us know if we can be of any other help.

If you have any other questions, please do not hesitate to ask.

Kind regards,
Michael

 

[Stock AFM SS Wagon]

Need to change the PPM (pulses per minute) in the gearbox via Tech2. Find the standard PPM and divide it by the standard diff ratio, then multiply that number by the new diff ratio and that will give you your new PPM to enter, then all is done.
IE- 2000 PPM ÷ 3.08 = 649.
649 × 3.89 =2524PPM

 

[Immortality]

Need to change the PPM (pulses per minute) in the gearbox via Tech2. Find the standard PPM and divide it by the standard diff ratio, then multiply that number by the new diff ratio and that will give you your new PPM to enter, then all is done.
IE- 2000 PPM ÷ 3.08 = 649.
649 × 3.89 =2524PPM

If only it was that simple....