My son is not autistic but has
motor planning issues that affected
speech. I would look up sensory integration
disorder or processing disorder and see if anything looks familiar. What is hard is that your son is still so long, trying to figure out exactly what is going on is really difficult. My son had some symptoms of sensory but grew into more of them. By 4, we had no doubts. I will tell you though-------- with intervention, my son functions pretty close to normal.