frigidaire washer not spinning

My Frigidaire washer will not spin. It agitates. But won’t spin. I took the front cover panel off, and the belt is spinning on agitate, but not on spin. The belt is burnt also. The transmission was replaced 6 months ago. The seal is leaking under the agitater, leaking onto transmission from underneath on agitate and on spin cycle. I checked the motor to see if it was spinning and it is spinning on agitate with belt on, but I didn’t check with belt off, I assume that since the motor is spinning on agitate it should spin on the spin cycle to. Well, not sure if it is a bad motor, a relay, timer or what. The timer goes through all the cycles, but I guess that doesn’t mean it isn’t bad. Well, any help would be appreciated. Thanks!