I am the original owner of a 94 Legacy with 248K miles and, sadly, the transmission is going out.  I've read the threads on here about adding TransX, so I had the transmission flushed and refilled and added TransX.  This worked great for a while, but when it gets cold out, the transmission either won't go above 3rd gear or jumps around between 3,4, and 5.  I went to a transmission shop and they said they can rebuild it and give me a lifetime guarantee, but they can't predict the end cost - they said it will be between $1800 and $3000.  Otherwise the car runs pretty well.  Engine light comes on occasionlly, but then the next time I start it it won't be on.  So...I'm trying to decide if I should bite the bullet and retire my old Legacy or have the transmission rebuilt.  I HATE spending money, so I HATE signing up for a new car payment.  I know it's a pure judgement call, but I just wanted to get some input before I give up on it.  Anybody have any thoughts?