GMC 98 Safari, 176K, 6 cyl. randomly has been shifting with a extremely hard jolt btwn 1st & 2nd gears. It is sparatic and not continuous, very infrequent. Is my tranny pump going out? There is a continuous roar in the rearend, does that have anything to do with it? Will this jolting cause other damage? Thanks for any advice! GOD BLESS!!! :shock: :wink: :shock: :?