I am restoring a 2000 v6 with 70k on it. It was sitting for about 2 years before gifted to me. This is just my project car, not my DD. I already changed all fluids except the transmission. When I shift gears (especially in low) the stick shifts are very stiff and hard to shift, kinda needs force to get from 1 to 2. On top of that the steering wheel shakes a lot in mid shift. Could this all be due to the transmission or trans fluid?