Was shifting fine till my girlfriend took the car for a trip about an hour on the interstate no problems then after being there 4 hours she got back on the interstate and she only had first gear when she let completely off the gas it would shift to second after its in second it wont shift anymore and when you let off the gas it will idle all the way down like its in neutral. when you stop it goes back to first no problem. after reading some posts here i removed the vss and tested with an ohm meter it read 4 when set at the 1x setting and when the red gear is turned it pulses from open to 4. There are a couple of wire harnesses coming off the front of the trans one to a big black connector those connections were very clean then a small 3 wire white connector those connections were very dirty and corroded with broken insulation but the wires all seem to be grounds. Any help or advice would be greatly appreciated. Im somewhat mechanically capable so any test to help isolate the problem i should be able to perform. Thank you!