i have noticed that my TQ converter is locking and unlocking when going down the hi-way, it's a triple disk suncoast converter, is this normal or do i need a lock up switch, i am having a valve body put in this week so just wondering if i need to do some thing else.
thanks in advance

 

no your having some isssues there its called the fourth gear hunt. its ususally static noise in the electrical system from the apps to the transmission. you can fix it with a bypass resistor or a line cut out. you can find the info for it on ats website if im not mistaken. or the lockup solonoid could be going out causing it as well