making my speedo right

[slider4life]

hi guys id like to fix my speedo as i have a 4.8 final drive in my diff, my speedo reads about 20klm faster then it should how do i go about fixing this or can you send it away or buy a part thank you

[.ady]

get a 4.8 drive gear in your gearbox

[sun_moon]

what ady said... or buy apex RSM ?

[slider4life]

do you know were i can get this from by any chance

[.ady]

yea or rsm but thats a head fuck as well....u need some digital sender on the cluster which they apparently have and one on the tailshaft? im not sure i jst got a gps and drove and got rough estimates of speeds

60 is 70
70 is 80
80 is 95
100 is 120 etc

easiest way u get used to it....plus look at it this way u cant get a fine for speeding

[Oly AE86]

Speedo Drive Ratio Corrector - Changes the ratio from the gearbox speedo output, made to suit any diff ratio!

http://img44.imageshack.us/img44/4548/speedodrive.jpg

Bought from Castlemaine Rod Shop http://www.rodshop.com.au/

Order Page >>> http://www.rodshop.com.au/order_forms/SPEEDO_CORRECTOR_ORDER_FORM.pdf <<<

Faxed this page to them with speed details, payed via CC and 4 days later was in the mailbox.

Oly

[squish_m8]

I recomend either:
a. change sender gears
b. put a massive rolling diameter on the back
c. get used to it

I have had a 4.55:1 diff behind my 1j for about 1year where is supposed to be something like a 3.9:1. The easiest thing I found was just to get used to the speedo error