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Thread: Ignition cylinder getting stuck between off and run

  1. #1
    GMN Regular Giraffe's Avatar
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    Default Ignition cylinder getting stuck between off and run

    Started a couple of days ago. When I shut the car off, the cylinder has been getting stuck in the position between run and off, taking a bit of effort to turn it to remove the key. Any ideas? This is on my ‘90 Grand Marquis in case there is any important differences between those and earlier steering columns.
    —John

    1990 Mercury Grand Marquis LS (POTM March 2017 & May 2019)
    1995 Mustang SVT Cobra coupe (cream puff)
    1966 Mustang coupe (restoration in-progress)

  2. #2

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    Does it get easier to turn if you jiggle the steering wheel?

  3. #3
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    Shift tube bushing has warn out and slid out if place. When it does this it blocks the locking mechanism which prevents you from removing the key. That's why sometimes shifting in and out of gears can sometimes work. That shifting movement can sometimes get that bushing out of the way.

    It's a pretty easy job and my replacement bushings lasted at least 5 years/50k+ miles before wearing out and and occasionally catching the lock mechanism. There is another style shift tube that had a collar that prevents the bushing from moving and blocking the lock mechanism. I'm not sure if it was a factory part or a replacement part.

    I'll see what info I can dig up.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - My rotting winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  4. #4
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    Pictuers:
    Here is my shift tube bushing. It's supposed to be under that cap held down by the two T30 or T35 torx bolts (like the other one half is).


    Here is a picture of someone else's shift tube with the design that doesn't allow that bushing to slip out like mine did.


    The one that is not mine belongs to Stealthlead. Both cars are '91 model year, but mine was built 11/90, so perhaps his is a later build or perhaps his shift tube was replaced at some point.

    Also looks like mine was more like 7years/70k+ miles before the Dorman replacement bushings started to wear.


    Following steps 1, maybe 2-3, and 7-10 of the '90+ heater core writeup along with removing the ignition cylinder (in order to remove the steering column shrouds) should get you to those bushings.
    Attached Thumbnails Attached Thumbnails shifttube_zpsa52d4948.JPG  
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - My rotting winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  5. #5
    Southern
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    1990-2004 Taurus platform &Panther platform at least use these shifter bushings. Hot climates bake these bushings and give you a sloppy shiter like you mentioned Vic - or just, age.. My Florida 03 the bushings were dust. Replaced them made it shift like new.

    John you may want to take the ignition tumbler out and feel how the ignition turns by hand to make sure you don't have another issue.
    -Nick M.
    Columbia, SC

    66 Squire, 89 Colony Park, 90 TC, 03 (2x) TC, 06 TC, 07 TC
    03 BMW 540iT, 04 Ford F150 4.6 XLT Reg cab, 8ft bed

  6. #6
    GMN Regular Giraffe's Avatar
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    Thanks for the help. I have a new set of shift tube bushings somewhere in my parts stash. Still going through moving boxes, so I may not find them for a week or two. The ignition cylinder is a NOS piece I installed last year, so I'd be surprised if there is anything wrong with it.
    —John

    1990 Mercury Grand Marquis LS (POTM March 2017 & May 2019)
    1995 Mustang SVT Cobra coupe (cream puff)
    1966 Mustang coupe (restoration in-progress)

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