Quote Originally Posted by gotpinkspirit View Post
I have a 92 suburban 2500. Having issues with speedometer dying after 2-5 miles driven. Have tried replacing speed sensor ... not fixing the issue. Thinking need a drac but we can't find one. The so hasn't turn it out yet but told me I'd need one that works for a 17 bolt pan tranny. It's got the 5.7 V8. Do you have one that will fit? Do you need more information? This is my shop, my husband and I's first time dealing with this drac part and aren't having any luck finding one to buy to try and replace.
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