Late reply but i figured this out last night and it might help anyone else that googles this.
Here im getting the current speed of the vehicle, and storing it in a variable from a function on the car. Mines a string, because i use that for a in-game speedometer, but you could use an Int.
From here, im checking what that varible is. If its above my threshold, i set the Drive Torque to 1, otherwise i let it accelerate. For your blueprint, id just use the “ForLoop” node, and set you indexs to match all 8 tires (you would do 0-7)
Im not totally confident thats the “right” way, but it works well enough.