OK, I have ~81k on my 2003 3.0i, I was on the way to my friend's house tonight and as I was pulling up to a stoplight behind a slow-moving Grand Cherokee, I felt a very slight clunk, the rev counter dipped for a second, and transmission failsafe came on. I still had all my gears, so I'm not sure what the problem was.

Went and parked it, turned it off and back on, no problems. Drove for a little while at moderate speeds, pulled into a parking spot at Target, and trans. failsafe came BACK on. Reverse was still working. I drove around the lot, pulled into another spot, shut off the ignition, turned it back on, and now "Service Engine Soon" was lit up, and I was still in transmission failsafe. I let it cool off for about an hour, started it back up, transmission failsafe is gone, but my SES light is still on.

I'm taking it in to get diagnosed tomorrow - but I was hoping someone could ease my anxiety. Failsafe seems to only appear when I'm coming to a stop. Could this be something simpler than needing a new transmission?

__________________
Gone, but not forgotten:
2003 X5 3.0i - 135k - the most expensive club in the world.
Premium, Cold Climate, Rear Climate

Service History

Mods and Retrofits: Satellite radio, MediaBridge, DEPO HIDs + LED AEs, M-B W164 rear-light mod, clear corners, BSW x108 Subwoofer System, illuminated door handles, titanium grill, compass/auto-dim mirror

Traded 9/1/16 -- 5UXFA53533LV80809 -- If you know his whereabouts, please contact me.