around my area there is major road construction that i drive through. my car is lowered on tanabe springs only. i have not changed the shocks. after driving in the construction roads too fast, i feel my driverside rear shock is giving out. any suggestions?

 

Did you replace your stock shocks with aftermarket ones when you installed the Tanabe springs? If you didn't, it's probably about time to replace them with aftermarket ones.

 

Depending on the bad to worse roads we have here, it's probably dead. The rear ones in mine I thought were gone at 65K and at ~70K miles when the Eibach's went in that was confirmed. When compressed, the piston only came back up on one of the four.

 

hmm ic, i was trying to save up for air suspension which would be another few months. how many miles do you u think it will still last?

 

From a safety and handling standpoint, the conservative answer would be to replace them.

It's hard to tell on car unless there are obvious signs like irregular tire wear or leakage. The other is to observe the car and how the suspension reacts with road variations. Bouncing tire, the floaty ride....

Given you have a suspension update in mind, the odds are probably safe that you'll be okay. YMMV of course.