1 more dumb question - bad kickdown adjustment cause no reverse?

Sorry but the throttle pressure linkage won't affect reverse. I read your other post about how you jacked it up and put it in reverse manually and it went into reverse. Either the linkage is totally screwed up or there's an internal problem with reverse. There could be an internal problem that makes reverse very weak. It'll spin with the wheels off the ground but not have enough to pull the car. I'm betting that's what it is sorry to say. Drop the pan and check the reverse band adjustment. If it's loose it'll do just what you described.