Hello,
You really did not give alot of info. When you put the car in gear does it go,or does the rpm go way up and it really goes no where. If the car is driving like normal but you are hearing a squelling noise it is probably the belts. some belts have a tendency to stretch after installation or the where not properly installed. Check the v-belts by pushing on the belt where the distance is the longest between pulleys there should be about 1 inch of deflection. On the serpentine belts which are the multi grooved thin belt they should be a less delfection maybe a 1/2 inch or so. I hope this helps.
Copter Steve
