just got the nova back from the shop with the fresh 700r4 build. took the car out for a cruise and went about 10-15 miles or so. all of a sudden i could rev to 4 grand and the car would barely move, then it slowly lost the gear completely. so i pulled into a parking lot quickly and turned the car off. i checked the tranny oil.. it was full and the fluid wasn't burnt. i waited about 10 minutes went in the store and came back out and started the car. i put it in reverse and backed out and put it in drive and went to the parking lot across the street at which point it started to "lose the gear" again and slip away. every time i turn the car off and let it sit and restart it all the gears engage again but only last for so long. is this something simple like a pressure problem--pump went out? it's all under warranty and is back in the shop but is sitting there due to the holidays and i thought someone could shed some light on this. thanks.