Lincoln vs Cadillac Forums

(This is the forums archive - If you want to get back to the main site simply click the banner above and you will be taken to our homepage.)

Lincoln vs Cadillac Forums is the Ultimate Online Resource for Owners and Enthusiasts of American Luxury Cars. Feel free to browse through our archive - but make sure you make it back to our main site - Lincoln vs Cadillac Forums

Cadillac XLR : Cadillac CTS : Cadillac : 2005 Cadillac STS : Cadillac Forums : 2000 Lincoln LS : Lincoln Mark VIII : Lincoln Mark VII : Car Wax
Lincoln Town Car : Lincoln Air Suspension : Lincoln Continental : Lemon Law : Do It Yourself Car Repair : Lincoln vs Cadillac Forums : Mesothelioma

Back to the Archive Main Page

Pages: 1

Could it be the Air Ride Suspension?

(Click here to view the original thread with full colors/images)

Posted by: Naevoid

I have a 1999 LTC and at 70 mph the rear end will give a vibration when the speed gets an increase. The vibration only last for a few seconds but makes the car shake bad enough to feel it. I also just had to replace the rear tires which you could feel the belts worn thru the tires on the inside bottom of the tires. Could this vibration be caused by the Air ride suspension? and if so what could the problem be?
I need help?

Posted by: abe_lincoln78

Sometimes you can feel it when the pump comes on. If the PCM is set to check and adjust ride height at 70mph. With that you would hear the pump come on and do its thing for a second or two or three and then turn off.

One reason the pump comes on after that initial rise in suspension is because when air is compressed into the spring it heats up and expands. When it cools back down to ambient it contracts, which allows your car's rear end to drop a little. The air ride will at some point come back on to make up for that sag.

It could also be your torque converter coming out of lockup when you push on the accelerator. If thats whats happening you have a date with the dealership or transmission shop in your very near future.

*looks away from crystal ball*

Posted by: Naevoid

Thanks for that info. I don't think it is the pump because the rear end vibrates when you give gas or let off the gas. It's kind of like draging a heavy table across a tile floor and the table kinda hops when you are draging it. Someone told me it could be the trans. but it feels like the rear end.

Posted by: dRock95MarkVIII

How many miles?

May be axle bearings.

Can also be bad u-joints, causing driveline vibration at high speeds.

Posted by: no0c

Quote:

Originally Posted by dRock95MarkVIII

How many miles?

May be axle bearings.

Can also be bad u-joints, causing driveline vibration at high speeds.

I vote for u-joints !

Loans:Buy Anything On eBay:Car Insurance:Personal Loans:Remortgages