Recently had my 4l80e and np246 rebuilt. Installed myself and both were working flawlessly. Started noticing my speedo would start jumping around 60mph and the abs and brake lights would come on. All of that would clear the next time i cranked it. Now the speedo will not work at all and the abs and brake lights stay on with the "service brake system" message on the instrument pannel. Took it to the guy who rebuilt my trans and he hooked it up to his computer and it showed a bad vss. Ive replaced all three in in the transfer case and disconnected the battery in hopes it would all reset. Still no speedo and abs and brake light still come on. The trans acts like its in safe mode and doesnt want to shift out of first. Whats next?

This is my first time posting but I've received a world of info from this site!

 

Did you ever find a fix to your problem?

 

Hey guys new to the LS world and was tearing into my 5.3 and found these. are they normal? guy I bought it from says he has them in his block too

 

Perhaps start your own thread, might get you more answers.

Seeing how this was a question about a speed sensor at first.

 

sorry about that, thought I had started my own