1997 Ford F-150 Transmission/speedometer/airbag lite

My 1997 f-150 has @86000 miles and my airbag indicator would flash now and then and then it seemed to stop. Well today I started down the road and it had a static sound coming from down below my gas pedal and when I started driving it shifted hard from 1st to 2nd. I noticed it and also notice that my speedometer is not operational, it is staying at zero but my tach is working. So I drove back to my house, it seems to shift ok from 2nd to 3rd and down shift ok but from a stop lite it shifts like at 3k rpms and shifts rough and I checked my fluid in transmission is ok and clean. Thanks for the help in advance.I am able to use reverse gear and idle in neutral. Just have a static sound around my feet like something is sizzling and I do not smell anything. Thanks.R Murphy