DFlett

Here is the TSB I told Ford to look at for me.

I took my Sable into ford. As expected, they could not reproduce and wanted to send me on my way. Somebody in one of these forums had the great idea of just leaving their car with ford and let one of their mechanics use it as a daily driver till they could reproduce the problem. Three days later (yesterday) I got the call. Problem reproduced. The flight recorder is detecting any codes or errors. The system performs nominally, but during the "clunks" there seems to be a pressure drop detected in the transmission. I didnt catch it all over the phone, but Ford seems to think it would take more time to diagnose the problem then to just swap out the transmission. So for only 5k they can have me out the door with a 40k mile tranny..... How about no. I'm going to go in and talk to the mechanic that worked on it directly. I purchased the vehicle for 5k so it's not worth it to swap the tranny for that much. Plus, with no solution to the problem on their end, for all I know this will just happen again at 80k-90k miles and I'll be back to square one. All sensors and the solenoid body seem to check out during diagnostics. TSS and OSS are not throwing any failures. I talked to a industry shop and they said they had never seen a failed OSS or TSS without codes indicating their demise. Dexter - I'll look into the "drive line clunk" TSBs. When I mentioned a TSB that described my exact problem they said my software was already at the most recent update. Any more information you guys have would be helpful. Thank you all for your time.

I'm going to resurrect this one again... has anybody identified the root cause of the problem in this thread? I have a 2008 Mercury Sable Premier (98k miles), with the same 6F50 transmission. What I am experiencing is inconsistent hard shift between first and second gear at low RPM, mostly in stop-and-go traffic. The jerk is on the verge of physically painful, not to mention emotionally as I sense my transmission slowly dying after every jerk. I'm now resorting to leaving the car in Low will driving in traffic to avoid further damage. The problem started some 6k miles ago. Just like people on this forum and others, I am not getting a single code popping up. Brought it to ford this weekend that they said they would need to bring it in for diagnostics and check it out themselves. But because the problem is so inconsistent, my guess, as others have experienced, is that they will not be able to replicate and send me on my way. More and more people have been pointing towards the TSS and OSS sensors as the root cause, however I have yet to find a thread where that has been confirmed. I have the repair manual and am confident I can get to the sensors and replace them, but I don't want to burn a weekend (or more since nothing goes as smooth as expected) to replace sensors that are not even throwing a code! Those TSB issues seems interesting above, but unfortunately all of those links are dead now. Any help or advice would be much appreciated. Regards Just-an-average-guy-scared-to-crap-of-the-cost-of-replacing-a-transmission.