145 MPH speedometer adapter

[dbeers1]

I changed my speedometer from 85 to 145 mph and now it is way off. Can anyone please tell me where I can find the part to fix this? Thanks

 

[TR Custom Parts]

You need to have a speedometer shop recalibrate your unit. There are adapters out there but messes up your odometer readings.

 

[Nasty Wendy]

I have an adapter somewhere. I'd have to look around to find it. You need to consider what Mark suggested. Recalibrating the speed-o is the right way to do it. The adapter will get the needle to read the right MPH but it will cause your odometer to register mileage incorrectly. It will also cause problems with torque converter lock up. If you have a lock up torque converter what ever speed your computer calls for lock up will not happen until a much higher speed. If your converter should lock at 40 it won't lock until 68 mph. That speed is determined by the chip. The problem is that the adapter reduces the vss so the computer sees an incorrect speed. The adapter is a band aid fix. Recalibrate it and you have no other issues. If I come across that adapter I'll put it on the side but I hope you decide to do this right instead.

 

[T-CHRGD]

Kirban offers this service:
http://www.kirbanperformance.com/pr...ECALIBRATED+SPEEDOMETER+WITH+DECAL+#6810.html

 

[dbeers1]

Thanks for the info. I think I will see about calibration.

 

[fast86gn]

I have that same adapter but I never used it. I had a local Speedo shop calibrate it for me. Kirban does offer the service, but check your local area you may find someone close by?