My 97 Range Rover SE is acting peculiar when shifting. In normal driving (sport button not pushed) it shifts fine in 1st thru 3rd, then doesn't seem to want to go into 4th. However, when I push the sport button, it will drop into 4th gear no problem. But, it also seems that when in sport mode, I have to manually shift the gears, it won't kick down into a lower gear. This may be unrelated, but when I apply the brakes I also get the abs light, parking brake light, and traction control light on the instrument cluster for a second or so, then it goes away. Accompanying the lights is a buzzing sound. Something strange is going on, not sure where to start.