hi all just put a ke70 5spd in my ke30 and my speedo is out 20kph out when I'm doing 100 it says I'm doing 124kph at a 100 from my gps wanted to know can i change my speedo gear from my 4spd will that work

Mine did this when I did the same conversion. Didn't stress me. Liked the look on peoples faces when I was doing "130km/h" on the freeway :)

yeah but i want an acurate spedo thats says I'm doing a 100kph not a 120

Accurate is a relative term when your talking old corollas. My ke55 with a Ke55 5 speed, and correct diff is 10% out and will be forever more. (I think it is because the factory rolling radius tire is taller than the common sizes found now)

 

There is a mob in Melbourne who make converter boxes that can step the speedo cable speed up or down without having to disassemble a gearbox, but their name escapes me at the moment. Have used their product for a supra-box-in-cruumydoor-conversion and it worked quite well.

Accurate is a relative term when your talking old corollas. My ke55 with a Ke55 5 speed, and correct diff is 10% out and will be forever more. (I think it is because the factory rolling radius tire is taller than the common sizes found now)

 

There is a mob in Melbourne who make converter boxes that can step the speedo cable speed up or down without having to disassemble a gearbox, but their name escapes me at the moment. Have used their product for a supra-box-in-cruumydoor-conversion and it worked quite well.

 

If your that worried about it there a a couple of options.

1. grab a few different speedo gears from the wreckers and suck it and see
   
2. use your GPS to mark the speedo at various points for 40, 60, 80, 100, 110km/h
   
3. use a speedo corrector as above.
   
4. Talk to an instrument repair place. May be able to recalibrate your speedo
   

old 4 spd was accurate just this 5 spd isnt and i have to keep the gps on charge all the time

ill try new gears soon

not the best option but would an aftermarket speedo gauge be a possible solution?

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1. Talk to an instrument repair place. May be able to recalibrate your speedo
   

 

My old man did this to a truck. Got sick of the drivers complaining that it was slow and would only do 100km/h. Sent the speedo off and got the repair place to adjust it to read 10km/h higher than it actually was doing. Drivers were happy until they found out what he did 4 years later