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#4505537 - 09/02/17 03:00 PM 2003 Grand Marquis differential oil change
ZZman Offline


Registered: 03/17/08
Posts: 5792
Loc: Michigan
Did my first ever rear differential oil change. (Have owned mostly front wheel drive)

I found it pretty easy to do. Bolts on cover broke free easily. Oil hole bolt took a little heat and liquid wrench.

I used some rtv for differentials to seal it back up and cleaned gears good with brake cleaner. Decided to use Mobil 1 75-90 in it.

I think this was the first change for it being the transmission fluid had never been changed.


Edited by ZZman (09/02/17 03:02 PM)
_________________________
2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40

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#4505569 - 09/02/17 03:39 PM Re: 2003 Grand Marquis differential oil change [Re: ZZman]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Where's the question ?

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#4505598 - 09/02/17 04:29 PM Re: 2003 Grand Marquis differential oil change [Re: ZZman]
Y_K Offline


Registered: 05/29/09
Posts: 2152
Loc: WA (USA)
How many miles?

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#4505602 - 09/02/17 04:34 PM Re: 2003 Grand Marquis differential oil change [Re: Y_K]
ZZman Offline


Registered: 03/17/08
Posts: 5792
Loc: Michigan
Originally Posted By: Y_K
How many miles?


129,000
_________________________
2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40

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#4505604 - 09/02/17 04:36 PM Re: 2003 Grand Marquis differential oil change [Re: Merkava_4]
ZZman Offline


Registered: 03/17/08
Posts: 5792
Loc: Michigan
Originally Posted By: Merkava_4
Where's the question ?


What do you think of M1 75-90?
_________________________
2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40

Top
#4505645 - 09/02/17 05:17 PM Re: 2003 Grand Marquis differential oil change [Re: ZZman]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: ZZman
What do you think of M1 75-90?


It will be fine.

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#4505663 - 09/02/17 05:49 PM Re: 2003 Grand Marquis differential oil change [Re: ZZman]
Y_K Offline


Registered: 05/29/09
Posts: 2152
Loc: WA (USA)
Wasn't 2003 the year of soft transaxle disaster on panthers? Heavy oil may help somewhat if it was.

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#4505670 - 09/02/17 05:54 PM Re: 2003 Grand Marquis differential oil change [Re: Y_K]
ZZman Offline


Registered: 03/17/08
Posts: 5792
Loc: Michigan
Originally Posted By: Y_K
Wasn't 2003 the year of soft transaxle disaster on panthers? Heavy oil may help somewhat if it was.


Not sure... But it wasn't giving me any issues and calls for the weight I bought.
_________________________
2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40

Top
#4505702 - 09/02/17 06:35 PM Re: 2003 Grand Marquis differential oil change [Re: ZZman]
ford46guy Offline


Registered: 06/01/13
Posts: 525
Loc: Albany, NY
Limited slip? I think all MGMs have TC, so probably not.
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#4505772 - 09/02/17 08:03 PM Re: 2003 Grand Marquis differential oil change [Re: ZZman]
buck91 Offline


Registered: 04/17/12
Posts: 2449
Loc: West Michigan
NO panther ever had a transaxle. As for LSD, I don't believe the MGM had that option but don't hold me to it.
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2011 F150 4x4 5.0L
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#4505894 - 09/02/17 11:15 PM Re: 2003 Grand Marquis differential oil change [Re: buck91]
Y_K Offline


Registered: 05/29/09
Posts: 2152
Loc: WA (USA)
Rear axles were not hardened and the bearings have no inner races, so the rollers that sit on the axles chewed the soft ones up

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#4506018 - 09/03/17 08:11 AM Re: 2003 Grand Marquis differential oil change [Re: Y_K]
ZZman Offline


Registered: 03/17/08
Posts: 5792
Loc: Michigan
Originally Posted By: Y_K
Wasn't 2003 the year of soft transaxle disaster on panthers? Heavy oil may help somewhat if it was.


The oil didn't look that bad when it came out. Maybe if it had axle issues that were repaired and oil was changed then
_________________________
2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40

Top