My trunk struts (manual not electric) seem to be going bad. They don’t raise the hatch all the way up. Rather they stop halfway, requiring me to help it get up to fully open position. The struts have enough strength to hold it up with no problem, just getting fully open is the issue. What part numbers would I need for the two struts and do I need to replace the mounting brackets as well because the actual strut itself looks stuck in the bracket. My vehicle is a 2008 Highlander base.