hi, i'm having trouble with my cen ct4s. when ever i accelerate it pulls to the right and it's also a bit unstable at high speeds. what would be doing this?

Oh yeah, and i did put diff silicone in the diff, but the diff was leaking!! whats up with that, diffs on my other cars don't leak, and nothing is broken on the diff, and the gasket is fine. weird.

Try to adjust the toe-in to point inside.

i've got the rear of car with toe-in pointing in and front toe in pointing out, got it the same as my other car, cause my other car would pull to the left if the toe in on the front was pointing in

are your pins for the wheel locking nuts in? i didnt tighten a wheel properly and one pin fell out and was doing this.

Front toe pointing out WILL cause wander. Real cars use just a smidgeon of toe-in, 1/32" or so usually.
You can get faster turn in by going to 0 toe, but no reason to go negative unless your racing in a cereal bowl.