No I wouldn't attempt it, a 3yr old shock needs a good refresh, do yourself a favor pull it out, it only takes 1/2 hr or so and get it REBUILT the oil needs changing and at the same time get it fine tuned to your likings...remember shocks are very simular to motors they need fresh and clean oil to operate properly or else you can SCORE the piston or shaft and end costing you a LOT of $$$, the rear shock is like $900.00 CDN to replace!
Good luck.