You could have a misfire on 1 or more cylinders

They probably never made an lsd in that gear ratio. You’ll most likely have to go to like a 3.07 rear gear or maybe even a 3.25 to get one

The blower motor could be bad. Was there air pushing out the vents or no?

Any chance you could take a picture

Lift kits aren’t too expensive.

Fan running on high after vehicle is shut of means you have a bad coolant temp sensor

Its rtv sealant. When they did your last oil change the tech doing it decided to smear it on to prevent a leak.

Might need to bleed the brakes and if it’s a manual you might need to bleed the clutch.