99' expedition replaced one rear air spring

[jvmagic]

Hi,
I replaced one air spring in the rear because the other was not leaking. My SUV seems to be wobbling while driving. Is this due to having two different air springs? One is OEM and the other is a replacement I purchased on-line.
I assume it's an issue being that it happened after I replaced the air spring. My other suspicion is that perhaps the air spring is not sitting properly though I checked it after installing.
What is your take?

Thanks in advance.

 

[gaping46and2]

Is the air compressor switch under the passenger side dash turned back on?

If it were me (and I already did) I'd replace both air bags with coils and forget about the air ride.

 

[jvmagic]

Hi,
I did turn the switch back on.

I spent $150 on one so if I need to then I'd buy another air spring instead of coil springs.....just because I will also be seling my SUV w/in the next 6 months.

Thanks