about 2 months ago i changed out the vac modulator bc of delayed shifting it fixed the delayed shifting then about 2 weeks ago i was on the highway and whent to pass someone and gave it gas it seemed to hop into nutral and reved right up but as soon as i let off the gas it hoped back into 3rd and the OD it has been doing this for a couple of days thena few days lator i got off the highway when i was on my way to work and when to go i had it in od and it just crawed along but when i put it in drive did the same thing but 1st and 2ed worked fine so i whent to work and drive it home ~15 miles shifting maualy 1st 2ed 3rd to highway speeds well after it sat over night and did the same thing so i just let it sit and took it off the road well last weekend as a last resort i put in the lucus tranny stuff that is to clean well it did not help well 2 days ago i whent out and started it up but now it crawls in od but drive drives fine and shifts 1-2-3 what the hell is going on what happed to my tranny today i am going to call some shops to see what they think could thier be a over drive spring that broke any ideas or info or web links would be great bc i just wanna get this thing to work right in the time being so i can sell it and get rid of it for some deciant money without doing a rebuild but if the only thing that thier is to fix it is a reebuild or a tranny swap wiht a junkyard one it is most likely to be donated to the charity and use it as a tax break bc i dont have the money for a rebuild plus labor or a 400 dollar junkyard one and labor please help me so i know what to to