Originally Posted by 420driver

What happens alot is the shift linkage gets loose and slopy take your foot off the gas while doing about 65mph and try moving the shifter PARTIALY from the "d" gear to "n" very slowly untill you feel it shift into 4th. You should not have to go all the way in to "n" for it to shift . this does not always work but it shure is a cheap and inexpensive way to find out. BUT YOU MUST KEEP YOUR FOOT OFF THE GAS WHILE DOING THIS BECAUSE IT WILL DAMAGE YOUR TRANSMISSON BADLY.