I have a 2000 LS(149,000) and from time to time my reverse is nowhere to be found. I've learned that by accelerating somewhat fast from a dead stop before needing it tends to make it have reverse upon stopping and needing it. Otherwise if I just pull off normally it's a crapshoot as to whether or not it will be there. Anyone else experienced this? I've bought a replacement transmission for a song but wondered if this is correctable without having it switched out.