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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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#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?
#57 of 87 Re: tranny slipping? [captain131] by bestracer500 Jan 26, 2008 (7:19 pm)
Replying to: captain131 (Sep 14, 2007 2:34 pm) Hey just wanted to say that i have a 1991 crown vic and the tranny went out and i believe what your probably expering is either the od band is out or there may be a throttle valve which is a cable that goes from the top of the motor to the tranny and the top piece is mad out of teflon and it has gotton hot and burnt up. if those are not the case check the rear end my went out with the same shuddering and when it went out i was going down the insterstate and the axle and all flew out so be carefull. anyway i have work on tranny for the ford people for 19 years and there just saying they dont know couse they don't want to work or they want to wait for the right time so they can rip you off. just chek those couse after i fixed mine rear end and tranny i have never had trouble. i have owned 3 crown vics and all have had tranny trouble. good luck
#58 of 87 transmission troubles by deangelotl May 17, 2008 (6:30 am)
Ok I have a 94 grand marquis and the trans just started acting up on me yesterday. It wouldn't shift into park and the gears fear loose when I shift to them. I found a bolt in the driverside floor board and it have no idea what it goes to. Please give me some kind of feedback on this problem. Replies to this message: euphonium (May 17, 2008 7:28 am) fordtransman (Jul 16, 2008 7:12 pm) datadown (Nov 02, 2008 3:23 pm)
#59 of 87 Re: transmission troubles [deangelotl] by euphonium May 17, 2008 (7:28 am)
Replying to: deangelotl (May 17, 2008 6:30 am) 1. Not shifting into Park may require a minor linkage adjustment.   2. Not knowing how many miles since you had a fluid change, perhaps that is due. Remember to also drain the torque converter and install a new filter in the transmission.   3. The bolt found on the floor board may be related to the need for linkage adjustment, but I doubt it. Your Mercury dealer parts manager would know by showing it to him.
#60 of 87 94 grand marquis trans by deangelotl May 18, 2008 (2:27 am)
what kind of transmission does a 94 grand marquis have. Im thinking about buying a whole new one, if anyone has that is in good condition contact me
#61 of 87 drives like a derailed train... by sts_endeavour Jul 15, 2008 (3:34 pm)
Hey guys,   My 2005 Mercury Gr Marquis LS with 111150 miles sometimes feels like the wheels are going to fall off at any moment. I'm pretty sure I have a warped brake rotor, but would that cause the car to shudder like nervous Nelly while the brakes aren't engaged? Otherwise I have had the alignment inspected (multiple shops say it's fine) and the only items that aren't stock are the tyres, the Michelins have been replaced with Goodyear TripleTreads. I keep the car well serviced - engine and transmission fluids and filters changed, as well as the rear differential fluid... All in accordance with the owners manual. I'm kinda lost here because I'm starting to set off seismometers. Replies to this message: dannyodoul (Jul 15, 2008 4:47 pm) euphonium (Jul 15, 2008 8:18 pm)
#62 of 87 Re: drives like a derailed train... [sts_endeavour] by dannyodoul Jul 15, 2008 (4:47 pm)
Replying to: sts_endeavour (Jul 15, 2008 3:34 pm) It sounds like broken bushings or busted ball joints, or maybe the tie rod. The tie rod, often must be replaced frequently on the MGM.   The other issue with the tires may be the cause - make sure the tires are the same size and wideness.   Best luck. Sincerely, The Legendary Danny O'Doul
#63 of 87 Re: mysterious chugging [whitebread64] by pepperdog Jul 15, 2008 (5:50 pm)
Replying to: whitebread64 (Nov 24, 2006 9:08 pm) First thing you do is replace the fuel filter located on the frame rail. Get a motorcraft filter for about $16, and have an oil change place put it in for about $40. You will be amazed the difference something so small and forgotten can make. Be sure to have the mechanic show you the condition of the gas and water and sludge-like fluid flowing out of it after it has been removed so you can see how much sludge you may have in your tank. If your fuel filter is very sludged up, you will need to remove your gas tank and replace the filter inside the tank as well as clean out the tank so you get all the sludge and slime. This is something you will want to do to any car that has been sitting un-used for a long period of time, or if you buy your gas at out of the way mom and pop stations who never change their gas tank or pump filters.
#64 of 87 Re: drives like a derailed train... [sts_endeavour] by euphonium Jul 15, 2008 (8:18 pm)
Replying to: sts_endeavour (Jul 15, 2008 3:34 pm) A set of Michelins is in your future. Our Town Car has the Michelin X and the T Bird has the Michelin Hydroedge. Both tires carry cars with over 111,150 miles on them & they are smooth and vibration free.

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