1- While going up hills I can not make it up unless I push in the clutch. Might have to do this several times to get to the top of hill. Whats going on here?
2- While mowing, if i go in gear 4 or higher I get this bad GRINDING sound from the back of the mower somewhere. At the time of the grinding it also starts to jerk. If I go back to gear 3 its fine or if I come to a stop.
Both problems may have the same cause or be separate. Having to double clutch normally means that either the belt needs to be replaced and/or your idler tension pulley is bad. Grinding is normally an indication of internal gearbox problems if the drive belt tension is working properly.