I just replaced my liftgate pistons on my 4Runner. After 10 years they wouldn't hold/lift the tailgate up anymore. It was an easy process and I made a video of it.. Cost for 2 new Strong Arm pistons was about 50 bucks, both sides should take about 30 minutes.. hope this helps some of you guys.. https://www.youtube.com/watch?v=ud0nfojLTYA