Out of the blue the truck just starts shaking, never know when or where. I have to pull off road and shut it off, wait a bit, then start and leave and seems to be ok till next time. It has 37,800 miles. Last time on I-94 at 65mph it scared me to death it started shaking so bad. I also had a 2005 F150 that did this. Its not the tires, or engine but I think the drivetrain. Very bad safety issue as I am finding I am not alone with this problem. Someone needs to make Ford admit what this is and fix these trucks.

- Jackson, MI, USA

I bought the 2004 FX4 F-150 super cab in late 2005 with 25000 miles on it. I purchased a $1400 extended warranty from an independent company through the Ford dealership. After the first few months I noticed a grinding sound under the truck that sounded like a few ball bearings rolling around quickly in a metal bowl. It would last about 5-10 seconds and then I would not hear again for a few months. After about the 5th time this happened I took vehicle to the Ford dealership, and they could not duplicate the problem, so nothing was done. The next time this noise was heard I quickly turned on the 4X4 high via the switch on the dashboard and the noise went away immediately. I could do this every time after. This was telling me it was somewhere in the transfer case. So, last week around 60000 miles the transmission started grinding in traffic, slipping, and giving me a transmission fail indication where the odometer was located, and a flashing overdrive off. This happened for about 10 minutes until I could get off the expressway, and exit into a gas station parking lot. I thought for sure the transmission was going to blow out at any moment. I turned off the truck, which reset the transmission fail alarm, put the truck in reverse, which made a loud slamming noise. I then put it in drive and was able to drive home with only grinding noise in first gear. I waited 2 days, and then drove the truck to the dealership 40 minutes away without any problems. After a day in the S repair shop they pulled the pan and it had metal shavings everywhere. They called and told me they couldn't figure out how I was able to drive to the repair shop. They found some bad seals and a vacuum pump/solenoid in the transfer case, the transmission was gone and was completely replaced. All the software has been updated, which I have heard can cause the majority of the problems. It would have cost me around $6000 if I didn't purchase the complete warranty.

- Muskego, WI, USA

I honestly do not know what is wrong with my 2004 F150 FX4. My truck has been in the shop at both Lincoln/Mercury and Ford dealers here in huntsville, Alabama. Parts have been replaced on multiple occasions so I'm not making this stuff up and the dealerships know something is wrong, but does not want to fix the problem or does not have qualified/trained mechanics. This will be my one and only Ford.

- Huntsville, AL, USA