2005 Ford Five Hundred: transmission slipping

Filed May 17, 2014 · Engine, Transmission · 89,600 miles · CO

On the interstate headed towards denver, after about an hour, when to accelerate from about 70mph to ascend up the hills, the engine rpms accelerate, however, it feels that the transmission is disengaged (slipping) with no power to the drivetrain resulting in a drastic loss of speed. This happened numerous times in efforts to regain control and maintain speed. This was extremely hazardous as traffic was somewhat congested, and other drivers are expecting me to accelerate, however, vehicle was in a decelerating mode. This was only with light pressure to the accelerator. It sounded as if the gears had stripped in the transmission. We turned around and headed home, auto would not allow speeds over 60mph. Later the same happened at speeds of 35-40 on local roads. These transmissions are extremely dangerous. Ford knows of this problem and refuses to do anything about them.

Filed Jun 18, 2012 · Engine, Transmission · 47,000 miles · MO

Vehicle shifts hard when hitting passing gear on highway like transmission is slipping or going out. Lose all power and car will buck back and forth. Also does it when transmission down shifts and then tries to upshift when accelerating and engine warm.

Filed May 25, 2012 · Transmission · 48,000 miles · NH

Vehicle slipped out of drive into neutral while ascending hill. I had to pull over completely and stop, shift into low and slowly back into drive. The car behind me almost rear ended me as I had lost power with no warning. Car once warmed starts to buck violently while driving at an even speed, bucks violently when coming to a stop and randomly slips out of gear with no warning. I have had this car since 2009 and have pot less then 20000 miles on it. The dealer tells me the computer does not read any problems.

Filed Mar 13, 2010 · Transmission · 64,555 miles · NC

Car fails to down shift when accelerating hard. Transmission slips and becomes disengaged. This prevents me from safely accelerating to pass or avoid other vehicles. Transmission problem are chronic on this 2005 ford five hundred 6 speed transmission.

Filed Feb 24, 2010 · Transmission · 58,175 miles · IN

I own a 2005 ford 500 (purchased 9/08 with 32k) currently has 58k; took to dealership last week due to transmission slipping at various speeds on city streets as well as interstate speeds (car jerks erratically); was advised it was a "computer glitch" & dealer charged $80 for diagnostics. Tonight I was driving down a city street when suddenly the car began to jerk erratically again only this time the display panel read "failsafe engine mode" and the check engine light (yellow wrench light) came on; once I got home I shut the car off; restarted it and the display panel cleared but from what I'm reading on different forums is that this could be a multitude of issues; car is under extended warranty; will be taking to dealership tomorrow.

Filed Aug 25, 2009 · Transmission · 65,000 miles · CT

While driving for over 45 minutes or a really hot day car will buck and shake when slowing down. After that it has happened twice car slips out of gear then kick back in 30 seconds later while going 65mph on highway trying to pass someone.brought into dealer said never heard of this and could not repeat occurrence. So upgraded computer for $ 250.00 did not fix anything ,then had to wait 3 weeks for another appointment going on thursday wish me luck.

Filed Jul 17, 2009 · Transmission · 25,000 miles · MI

I have an 05 ford 500, 2 wheel drive, w/6 speed at/trans. At 30k miles it developed a transmission "slippage/jerk" when slowing to a stop from 35mph or less. I have also noticed the same when accelerating at highway speeds or climbing a hill when I hit passing gear. I cannot use the cruise control in hilly terrain because of this problem. It feels as if the whole front end of the car will jerk loose.

Filed Jun 4, 2009 · Transmission · 60,000 miles · FL

Tl*the contact owns a 2005 ford five hundred. While driving 55 MPH, the vehicle slipped out of gear and the RPM's increased. The vehicle was taken to the dealer, but they could not provide a remedy. The contact feels that a crash could occur due to the over acceleration. The current mileage was 120,000 and failure mileage was 60,000.

Filed Dec 7, 2006 · Transmission · 15,000 miles · CA

Purchased ford five hundred in february 2006, an sel automatic. Around 15,000 miles began noticing transmission issues, mostly hesitation when shifting into gear. First major incident occurred oct. 22, 2006 while traveling at 65 miles per hour on the freeway, engine revved while pressing the gas pedal but vehicle slowed as if it was in neutral. Then it punched violently and resumed driving normally. We pulled over thinking something major was wrong with the vehicle. We began our journey again and had several incidents of minor punching of the transmission, like it was slipping out of gear and going back in again. After we returned home, these problems were very intermittent. About 2 weeks later while driving on the freeway, the vehicle slipped out of gear and almost came to a complete stop before re-engaging. We brought it to the ford dealer the second week in november. They said they could not duplicate the issue, however they said there was a computer technician log that suggested a reset. They reset the computer, changed the oil, checked the transmission fluid, etc. A few days later the transmission was back to slipping intermittently. On november 20, 2006, the severe punching began again, so bad this time the vehicle almost came to a complete stop. We had to shift the gear into 2nd before it engaged and we were able to accelerate. Since we were on vacation, we had to continue on our trip with the transmission slipping in and out of gear. When we returned from our trip, back to the ford dealer we went. We took the transmission technician guy for a test drive and luckily we were able to duplicate the problem. He was amazed, hadn't seen anything like it before. He talked to other transmission tech's who were stumped by the problem, too. He ended up calling ford headquarters and spoke with the engineers. They decided a complete replacement of the transmission was in order because they weren't sure what was causing the problem.