Software to change speedometer signal

[becktom]

Does anybody has a software or know how to change the original set-up of the signal which runs from the transmission to the ECM/CCM?
As I've changed my rear end to another ratio, I'll need to modify my present system for correct MPH reading.
I know there are some additional convertors/gear sets on the market, but I would prefer to alter the existing software if possible.
If somebody might have an idea, would be great!

Thanks

Thomas

[Jeffvette]

Only thing that is available is the speedo correction box, which you splice into the existing wires and program it.

[becktom]

Thanks Jeff,

could you recommend any supplier/manufacture or doesn't matter?


Thanks
Thomas

[Jeffvette]

http://www.cyberdynegauges.net

[Ccmano]

Sorry to dig up this old thread...

My question is to Jeff,

Have you used the Cyberdyne box? If so how well did it work? I just changed to 4.10 gears and bought a Cyberdyne box. When I hook it up, the speedo just sits there at zero and eventually the "service engine soon" light comes on. When I remove the box all is OK. I'm calling Cyberdyne in the morning.
Any thoughts?
H
:cheers:

[XfireZ51]

Why wouldn't you change speedo gear in trans? :confused:
When I installed a ZF-6 in my 84, I also used 3.45 gears in rear. Just need right combo of drive and ring gear.

[-=Jeff=-]

I would get the gears from Haibeck.. for the trans and be done

[Ccmano]

Gears are $120 from Haibeck not to mention the labor involved. The Cyberdyne calibration box was $49 and is precisely adjustable. (assuming I can get it working)
H
:cheers:

[jonszr1]

you might give bill boudreau a call he did one for me on my white car when we did the clutch and tranny .