my truck just started doing this, when it is in between 2 and 3 grand it starts cutting out and acting up, my transmission has a bearing going out in so i don't if that has anything to do with it or not
is the engine missing, or is it just bogging down. if its missing it could be the timing, but if it is just bogging down that bearing could deff. be the prob.
since the filter is clean, have you hit it w/ a timing light? also does it only do it while pulling a load on the motor (driving down the road), or will it do it while sitting & idling?
double check w/ a timing light, it would sux to pull the tranny & it be a timing issue.....but w/ it doing it going down the road is sounds to me like that bearing in the tranny is your prob.