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SAAAAAC
10-25-2012, 01:44 PM
I'm looking for recommendations for some stiffer rear springs for my 1999 grand marquis. I did look at adtr.net and they have some Eaton Detroit springs. But they don't give much of a description on whether or not they are performance springs or just a direct stock replacement. Basically I'm looking for performance gains from stock, and I also want the rear of the car to sit just a little bit higher than it does currently. Any input would be appreciated.
EMAS
10-25-2012, 02:21 PM
Get some P71 springs, stiffer than the standard springs and they will make the car sit higher too.
MOTOWN
10-25-2012, 02:40 PM
Ive always used MOOG cargo coils
SAAAAAC
10-26-2012, 06:49 AM
Get some P71 springs, stiffer than the standard springs and they will make the car sit higher too.

Any particular brand, part number, or link to get them?


Ive always used MOOG cargo coils

MOTOWN , Do you have a part number or link to get these?
EMAS
10-26-2012, 09:54 AM
The P71 rear springs don't seem to be available in the regular aftermarket so I'd check wrecking yards or Ford.

For the variable rate springs they have them at Napa but those won't give you the lift you are looking for.
MOTOWN
10-26-2012, 12:11 PM
Any particular brand, part number, or link to get them?



MOTOWN , Do you have a part number or link to get these?

MOOG CARGO COIL 865 http://www.rockauto.com/catalog/raframecatalog.php
SAAAAAC
10-26-2012, 12:26 PM
MOOG CARGO COIL 865 http://www.rockauto.com/catalog/raframecatalog.php

Do you have a pic of your car with those springs installed? You can look in my profile for pics of my car and how high it currently sits.
MOTOWN
10-26-2012, 12:31 PM
Do you have a pic of your car with those springs installed? You can look in my profile for pics of my car and how high it currently sits.

MARAUDERS use airbags(in the rear), not coils springs, this is the part# your car calls for, if you want a certain height you will need aluminum coil spring spacers that sit flush underneath the coil springs
SAAAAAC
11-06-2012, 01:23 PM
I've got 2005 CVPI HAP-code springs on order. They will fit the 99 GM right? From the research I did, sounds like they will. Had to jump on the killer deal I got for all 4 springs.
RF Overlord
11-06-2012, 02:14 PM
I can't say with certainty, but I wouldn't be surprised if they don't fit. The Panther chassis was changed in 2003...
SAAAAAC
11-06-2012, 02:46 PM
After doing more research, sounds like the rears will fit but the fronts wont.


I can't say with certainty, but I wouldn't be surprised if they don't fit. The Panther chassis was changed in 2003...
SAAAAAC
11-07-2012, 08:02 AM
This is an awesome document I stumbled upon

http://www.idmsvcs.com/2vmod/rearsprings/index.html