OK so i have a 98 ford ranger 4x4 3.0 and i am having problems when it is in 4x4.when i engage the 4x4 it tends to bog down. Like when it gets into sandy parts i step on the gas and it dies right away it bogs down, i need to get speed in order for it to offroad good also when i go up a hill and starts getting stuck it just dies it doesnt try to force itself up. it just bogs down and just dies. does anybody have an idea what might be causing this. it would be great help to do some good offroading. any ideas please let me know can't figure it out.