Is the torque converter clutch still coming on after the speedo dies?
If not you need to verify the vss signal is getting to the DRAC from the sensor using a DVOM is fine set to AC volts. Voltage should increase from 0vAC to ~100vAC.
If the TCC is working then the DRAC is fine and you just have a instrument(speedo) issue.
If the DRAC is failing, get the 3 digit code from the DRAC itself, it will be something like QWB, PLK, etc in big bold black letters on a sticker attached the the DRAC.
Check these things and report back.
Buddrow
Bookmarks