if it doesn't go anywhere in "D" but it does fine in second it might not be bad..... 'cuz it obviously doesn't start out in 4th gear'. did you check your shift cable adjustment? it is on the drivers side of your trans i believe and there is a square white plastic thing holding your cable to your tranny i would check that before u go buyin a new tranny. unless your looking for an excuse to upgrade anyway. theres also a possibility that something came off or is loose in your steering column