I have a 93 4runner with a 3.0.... I've got a few questions.... it seems to be lacking power and bad gas mileage, it shifts 1/2 @ 10mph and 2/3 @20 to 25 mph and 0/d only comes on when tranny is warm enough.. I live in Alaska, so that means about 35 to 40 degrees and below no o/d and, over 40 or...