Colossal magnetoresistance manganites are archetypes in which to study the strong coupling between spin, charge and lattice degrees of freedom in materials. We present muon spin lattice relaxation data in ferromagnetic FM ground state materials from the manganites series La1 xCaxMnO3. These measurements reveal several characteristic relaxation modes arising from the strong spin charge lattices interactions. We also present results from neutron spin echo spectroscopy , which directly measures the spin spin correlation function in a time domain comparable to ?SR. A qualitative model for FM transition in the manganites involving microscopic phase separation is suggested by these data