guys, just a few days ago ive experienced a hard time shifting to 1st & 2nd gear. but the 3rd & up is ok. i had my clutch assembly replaced 2 yrs ago. I own a 99 slx isuzu hilander. Also the problem seems to be intermittent kse minsan naman ok sya 30% of the time. but the remaining 70% is not. what needs to be checked? ano ba talaga usual life span ng clutch assembly considering normal driving conditions.