how i did mines was (but not Recommended, i untangled the spring on the speedometer motor on a few tries) put the needle back on then just push it down all the way to the 0 mph mark while the power is off. i'm still a little off but only about 2 mph..

 

I did something similar (also not recommended), had the car on and moved the needle from 0 to 160. It was sitting quite a bit below 0 before this and now is only just a hair off... used my gps and its only 1mph off....

 

92 SC 400- my cruise control started flaking out surging and not functioning at high speeds, now a week later pretty much shot. have ordered a new motor. in the meantime,
my speedo got flakey and will not go above 45mph without bouncing all over. i also drove and pegged the trip counter reporting about 20 miles less than what i did.
anyone know if there is relation between speedo function and cruise control.
control is off and speedo malfunctions.
reading here sounds like there is a speedo motor i may need.

3 prong sensor on the transmission fixed cruise control and speedo needle.

 

hey all i know this is pretty old thread but ive been seaching and found this thread..
i bought a sc300 auto cluster from one of CL member to see if my rpm on my 1jz sc400 will read right..it turns out that the cluster is reading way off than it suppose to. My temp, rmp and speed reading way off..Has anyone found a solution or a place that can calibrate it. I jst dont wana ended up wasting $180 for cluster for nothing..

anything at all will gratefully appreciated
thanks PoGi

 

What modifications are needed to fit a Second Gen GS300 gauge cluster into a First Gen GS300? I am very interested in doing this so any technical support or tips/info you can provide would be awesome. Thanks

 

The speedometer will never match a GPS. There is +/- 5-10% variance from the factory on any speedometer. GPS compares satellite data with movement. A speedometer converts a spinning wheel and tire to a spot on the gauge face.

We should be able to help, shoot us a chat message, facebook, email, phone call, etc.