Transmission Fail Safe Fix 1997 840ci

[amurphCA]

Good afternoon fellow enthusiast.

I'd like to share my experience in my transfailsafe code solution.

About a year ago I started getting failsafe codes when driving the vehicle hard. I briefly looked into the issue but didn't devote enough time to it, had it looked at by two "BMW specialist" mechanics specifically to diagnose the issue. Both said with 100% certainty that the transmission needed a full rebuild.

I decided to do more work on my end and followed Timms advice on meeknet to fix the issue.

Like him my issue came from the switch on the side of the gearbox, however it was not an issue of dirty contacts. It was an issue of rubbed off insulation and shorted wires inside of the black sleeve.
Attachment 700993Attachment 700994Attachment 700995

I cut and soldered in new wire and taped up where there was not enough wire, and so far its run perfectly.
Big thanks to Timm for all his work on Meeknet.