93 Mercury Grand Marquis LS. Car shakes like a tire is about to fall off. Not balancing problem at all...way way way more severe than unbalanced tire. 20+mph, no change when steering or braking, no change accel/decel

the antenna wire probably came unplugged on the back of the stereo

Why are you telling everyone on the internet
and why would you even drive a car in that
condition?

Enough Said

first swap to a front tyre to eliminate that issue


new bearing shouldn't be rumbling
to get the bearing square on and home
did you use a press to fit the bearing to the rear axle
or tube method ?

and did the seal kit have this nifty plastic seal fitter so axle didn;t rip the seal surface

There are several problems associated with vibration, the most common being tire problems. If your tires are not properly balanced or are improperly inflated you will get a vibration, especially at higher speeds. If the vibration lessens or stops at lower speed, this is the likely cause and the least expensive to fix. If your tires need balancing be sure to have them dynamically balanced. This method mounts the tires on a special machine which spins the wheel at highway speed and determines accurately where the balancing is needed. The least accurate balancing method (static balancing) is not very accurate and may not fix the problem.
If your car tends to pull to the left or right when you apply the brakes, the problem may be due the front end being out of alignment. You can have a mechanic check the alignment and make necessary adjustments for about $50.

Mercury Grand Marquis: LS: Front and Rear Tires: P225/60R17

On Firestone's site it says for a 1995 Grand Marquis with the handling package, the tire size is P225/60R16 with or without the TPMS (tire pressure monitoring system).

For a 1995 Grand Marquis GS/LS with or without TPMS it says the tire size is P215/70R15.

The page I entered in the info is here:

http://www.firestonecompleteautocare.com/tires/index.jsp

Hope this helps.

hi it could be both but its also worth checking wheel balance also engine mounting rubbers hope this helps please rate this answer

most likely a either a tire is out of balance, or the driveshaft is. Check the tires for bubbles then have them all balanced. If the problem is still there then it might be time to find another driveshaft or try to have yours repaired (expensive)