Hello I recently installed a new clutch on my 1984 Toyota pick up 4x4 everything went smoothly but then when I drive it on the freeway all the gears go in perfect except when I put it in the last gear (5th) it makes a weird humming noise. But it goes into gear fine. While on 5th gear when I press the clutch the noise goes away. I tried to mess with the clutch pedal adjustment but still no luck yet should I keep messing with the adjustment until I get it right? any suggestions? I have a video of the noise I’ll try to post it soon. Thank you for all the help.