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Getting a code 720....

6K views 1 reply 2 participants last post by  RTZoD 
#1 ·
Ok, here's the deal. My buddy has a 99 R/T and has some minor mods to it (Exhaust, cold air intake), and wanted to try a performance tune from my 3715 that I have.

I downloaded it for him and he took it for a good run. After he got home and started to drive it again, the check engine light came on.

code is this: 720 The Output Shaft Speed Sensor doesn't match the reported vehicle speed

I put the truck program back to stock and reset the code but it came back.

Coincidence? Bad sensor? And where is the sensor located on the tranny?

Thanks
 
#2 · (Edited)
The speed sensor is located in the overdrive gear case. The sensor is positioned over the park gear and monitors transmission output shaft rotating speed.
Not sure but I think this picture has a green arrow pointing at it. This is a 46RH but it should be close.



 
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