I have a '79 Regal with a 350/350 combo...the other day I romped on it a little bit, the transmission kicked down and then shifted correctly, but it didn't feel right (almost like it was slipping). I cruised on to the house (less than 1/4 mile) and when I went out the next day it wouldn't go into any gear...no forward no reverse. I replaced the vacuum modulator and hoses and checked the linkage. The transmission was supposedly rebuilt prior to me buying the car. The fluid was red and did not have a burnt smell. I would think that I would at least be able to manually shift in forward or have reverse, but alas...nothing. Any help would be greatly appreciated. I am new to this forum and GMs, but not working on cars/trucks...