Highboys have 3" wide front springs and 2.25" wide rear springs. Lowboys after 1977.5 have 3" wide front and rear springs.
bad springs and/or shocks
Usually if your rear diff is going bad it will start to howl or grind.
how do you replace the rear springs on a renault espace
It could be a bad cylinder, bad springs, bad emergency brake, or could need to be adjusted.
shocks/struts have nothing to do with how high the car rides.... you have bad springs, or too much junk in the trunk...
Both springs should be the same length.
The compressor is either bad or your air bags are bad... Get springs from a rear 2wd Expedidion and swap them on your Navigator, is real chep and easy. and it feels just like the air bags. I did it to mine last week...
rear leaf front coil springs
Replace them in pairs. If you replace one front, replace both. One rear, both.
It has leaf springs.
Emergency brake not adjusted properly? Service brake not adjusted properly? Frozen caliper? Bad or broken brake return springs?