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Ford Crown Victoria/Mercury Grand Marquis: Transmission/Suspension

87 messages,  Last post on May 18, 2009 at 10:29 PM

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What is this discussion about? Ford Crown Victoria, Mercury Grand Marquis, Suspension, Transmission, Sedan

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#47 of 87 Re: tranny slipping? by captain131 Sep 14, 2007 (2:34 pm)
Replying to: jsylvester (Sep 01, 2007 6:20 am) Hi Folks, I have a 99 Grand Marquis that has had major issues, but only has 44K miles on the engine. I should preface this that my mother bought it back in 2001 with 21K miles on it. She knows nothing about cars, and the ford dealer at the time took advantage of her (IMHO). She never did a carfax (not that she would know what that is) on it, but I have since. It was originally owned by a "major car agency" (I believe that's speak for a rental) in Virginia. They shipped it to MA and she bought it. Over $6,000 later (not including the cost of the car) I have had numerous issues.   I have an extremely trustworthy mechanic and excellent diagnostician when it comes to cars of all makes - but this one has stumped him for the past 4 months. We had a total of 21 bad codes on the computer and after taking things apart we found evidence of salt water corrosion. Anywho, the car would drive at any speed and suddenly shut off - very dangerous. He was able to fix that. Down to one last problem - could use your thoughts:   When driving in OD, usually b/w 30 and 60 MPH, the car shutters a bit and the trac control light comes on. It happens occasionally when I'm driving with the OD off, but very infrequently. My mechanic has replaced every module and computer and bypassed wiring harnesses with clean, direct connections, to no avail. He brought it to a local Ford dealer, explained the situation, and they were at a loss as well. They mutually decided to replace (I believe) the traction control/ABS (?) module and reflash the computer. Still no joy.   Any thoughts? I'm thinking it's a tranny issue, but he already flushed and filled with Merkon V. He has gotten to the point where he has stopped charging me any labor, but that always puts me on the back burner when it comes to him fixing cars. I don't want to go somewhere else and start over again, and I certainly am not interested in going to Ford dealer as they seem to not give a crap.   Any thoughts, ideas, suggestions ???? Please - If this car had theft on it I'd actually consider drastic measures.... Replies to this message: bestracer500 (Jan 26, 2008 7:19 pm)
#48 of 87 '91 CV LTD wagon. Is Mercron backwards by teachinjose Sep 15, 2007 (7:31 pm)
Replying to: jsylvester (Sep 01, 2007 6:20 am) compatible w that car, too? I bot over $200 worth of Amsoil fluids and want to make sure they're okay for my old "tuna boat". The factory rep said they wear.   Also, do you think it's rational to want to keep the ol' girl running? The engine is strong,5.0L/150 hp, and it needs about $1500 in body work. Interior's very clean. This is the most comfortable riding car I've ever had, and I'd like to drive it for a couple of decades more, maybe even past that!   Thanks for all the tips.
#49 of 87 may have an your answer by tdock Oct 03, 2007 (5:54 am)
I too had the same problems with my gm. At speeds of 38 to 42, mostly going up a hill the temp light would come on followed by the traction control light. I could feel the transmission not locking up. My gm is a 2000 with 67200 miles on it. And was also a former rental.   I just got the car out of the shop yesterday. They rebuilt the transmission. The torque converter was the real culprit. It burn out out the overdrive band in the tranny. By talking to the tech that fixed my car, this is a common problem with these transmissions. Luckily for me I had 40 miles left on my extended aftermarket warranty and the repair was covered. The cost of the repair was just under $1900.00.   Hope this helps. Replies to this message: euphonium (Oct 03, 2007 8:37 am) captain131 (Oct 05, 2007 7:38 pm)
#50 of 87 Re: may have an your answer [tdock] by euphonium Oct 03, 2007 (8:37 am)
Replying to: tdock (Oct 03, 2007 5:54 am) Excessive heat is the No. 1 enemy of AT's. At only 67000 miles, an auxillary transmission cooler is an excellent idea. Examine the 10,000 lb model.
#51 of 87 Re: may have an your answer [tdock] by captain131 Oct 05, 2007 (7:38 pm)
Replying to: tdock (Oct 03, 2007 5:54 am) My problems were many, but what ultimately got the traction control problem solved was a new ABS module and a reflash of the PCM. Turned out that the part # on the ABS that was provided to Ford for the replacement months ago was the wrong part #, albeit this part # came right from the module installed in the car. The only explanation that makes any sense is that the original ABS module was replaced with the wrong one. So replacing the wrong module with the wrong module again obviously doesn't solve anything. We proved it to the Ford service dept (they tried charging me another $700 for a different module), but got them to relent and take back the wrong one and replace with the correct one. Everything seems to be back on track, to use a bad pun... Thanks to everyone for your input.
#53 of 87 Re: transmission problem w/ '02 Crown Vic [crownvic2] by pepperdog Nov 22, 2007 (7:51 pm)
Replying to: crownvic2 (Apr 29, 2006 7:55 pm) take some electrical contact cleaner and spray the mass airflow sensor. This will clean it, and might solve the driveability situation.
#54 of 87 transmission/engine noise by pepperdog Nov 22, 2007 (7:58 pm)
I have a 2003 Crown Vic Police Interceptor with 35000 miles on it. It was a light duty car for the Sheriff and his deputy, and never used for patrol. My problem is that it seems the engine and transmission roar louder than they should on acceleration. I have a 1995 CV and it is quiet and does not roar on acceleration. I know the 1995 car has lot's of insulation whereas the cop car has a vinyl mat and very little sound damping. Everything works correctly and the car runs great..no issues with tranny or motor..except they seem a little loud. Also, the gas pedal is hard to push..it seems to have a lot of resistance, and gets very tiring on long drives without cruise control. It doesn't seem like it is binding, just hard to push. Can the accelerator cable be adjusted?
#55 of 87 Crown Vic transmission slipping? by pacobun Dec 02, 2007 (8:22 am)
i have a 2007 Crown Vic with 33K on it. I am having a problem whereby anytime the roads are wet, the powertrain seems to act out. It will usually happen when snow or ice are on the ground, but this makes no sense to me. First, the car will feel like a skip hits it. Then eventually, a lit wrench appears on the dashboard. The engine lihgt also illuminates and remains on. The cruise control also goes out. If i restart the car, everything is back to normal until the skip happens again.   I had this on my 2006 crown vic, and the dealership didn't know what the problem was because I could never get it there with the wrench lit. Anybody know what i'm talking about or have experiences with it?
#56 of 87 output speed sensor insufficient input by sparky28 Dec 02, 2007 (1:50 pm)
2001 Grand Marquies 4.?L engine 32 K miles. The service engine light came on and the overdrive on/off light began to blink. Took it to autozone for a scan and it came up with the output speed sensor insufficient input code P0720. Is this possible it's just a bad sensor or can this be an input problem to the sensor? I can cycle the O/D button on the shifter a few times and the light will stop blinking on and off. Does anyone know where the sensor is located? Is this something I can change while changing the transmission fluid?

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