actually - that's no big deal - those are passive shocks - not active -
the Monroe 40046 - is the same thing -
and you can get them for $99.60 each with free shipping on Amazon.com
the Monroe 40018 ARE true ACTIVE shocks -
$335.02 each with free shipping on Amazon.com
I've been looking on amazon for rear shocks. Would you please explain a 'passive' and 'active' shock. I have been looking at the Gabriel 49254 , I want a little lift and some cushion for bumps. Thank you Ed
Active and passive refers to the shocks/struts having an adjustable damping rate (stiffness). other than OEM Ac Delco, or Monroe's active replacements, all other replacements are passive.
Shocks/struts do not dictate ride height, that's the coil springs job. However, the rear ELC system uses air bladders integrated into each rear shock to maintain proper ride height when weight is added.
If the rear is sitting low, there's either a leak in the system, the pump is bad, or a height sensor is faulty or disconnected.
I bought a set of ACDELCO Professional 504-579 (19241356) air shocks for my '97 Eldorado for $120 shipped from RockAuto. I couldn't be happier with them. I was worried about the ride, but they are great. The price was excellent, too. Couldn't be happier with the results. Instead of 30-40 seconds of compressor pumping during the automatic prime period after turning the ignition on, it now only takes 3 seconds or so, and they work like a charm when load-leveling.