Rear Suspension Grand Marquis LS 1998

[bdcardinal]

I read the description. They make it sound like the car with air leveling suspension doesn't have coil springs in the back. I guess they're saying there's air bags instead. They make it confusing.

Correct. They have airbags instead of coil springs. The shocks are unique to air suspension as well.

 

[Soft Cars]

Correct. They have airbags instead of coil springs. The shocks are unique to air suspension as well.

So it's like the Lincoln Towncars I see running around town that are completely bottomed out sitting on their stops because their airbags are blown?

 

[MParr]

Correct. They have airbags instead of coil springs. The shocks are unique to air suspension as well.

Was the air ride an option on those Grand Marquises? My dad’s 2002 was standard shock and coil springs setup.

 

[Soft Cars]

I think we're mixing up air ride with automatic level control.

 

[bdcardinal]

Was the air ride an option on those Grand Marquises? My dad’s 2002 was standard shock and coil springs setup.

Yes, I think they called it the "Handling and Performance Package." My grandpa had a 92 GM with it and my mom's 2000 GM did not have it.

 

[CARLOS DE LA CRUZ]

Look in the engine compartment on the driver's side next to the windshield washer pump. There might be a suspension leveling compressor there.

View attachment 196696

No, it isn't there any device like this! Thanks for your feedback.

 

[CARLOS DE LA CRUZ]

These are the coil over shocks you would install if you were deleting the automatic leveling air shocks in the post above.

View attachment 196700

I didn't delete anything, it had already the rear coils. So, as others mentioned, maybe they just need to be replaced

 

[CARLOS DE LA CRUZ]

These are possibly the best springs available from the aftermarket for that car. Moog, KYB, Delco are all generic, LESJÖFORS makes to OE size and compression specs. they make a cargo spring for this one which should help your situation.

LESJÖFORS 4427553 Coil Spring | RockAuto

RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog.

www.rockauto.com

So, if I change the rear coils for new ones, I must got that to missed 2" in the rear side? Thanks

 

[Soft Cars]

What's the difference between constant rate and variable rate coil springs?

 

[CARLOS DE LA CRUZ]

So, if I change the rear coils for new ones, I must got that to missed 2" in the rear side? Thanks

These are possibly the best springs available from the aftermarket for that car. Moog, KYB, Delco are all generic, LESJÖFORS makes to OE size and compression specs. they make a cargo spring for this one which should help your situation.

LESJÖFORS 4427553 Coil Spring | RockAuto

RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog.

www.rockauto.com

what about if I buy them from Autozone? Are they good or nor? Thanks

 

[CARLOS DE LA CRUZ]

These are possibly the best springs available from the aftermarket for that car. Moog, KYB, Delco are all generic, LESJÖFORS makes to OE size and compression specs. they make a cargo spring for this one which should help your situation.

LESJÖFORS 4427553 Coil Spring | RockAuto

RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog.

www.rockauto.com

I have checked these and other brand rear coils in this website, and I found the rate they have is 157 or 163 lbs/in, I found information about this and civilian cars use rear coils with 130 lbs/in and in the front 410, 440 and 560 lbs/in. Interceptor uses rear coils with 160 lbs/in and front uses 700 lbs/in. So, do you know what could be the main difference using "stronger" coils? The feeling could a hard suspension? Thanks