Blazer Forum - Chevy Blazer Forums

I have a '99 LT 4x4. I got a call from my girlfriend one day saying that the blazer wont go into reverse. I went and checked it out and sure enough it didnt go in reverse. We pushed it out of the parking spot and I jumped in it and took off home. It wont shift out of 1st until you get to 20 mph, and then it wont shift out of 2nd(or it seems like). I got up to 55 and i looked at the rpm's and they were up to almost 2500. when i pulled it in the driveway and put it in park the check engine light came on. so i checked the code and it was P0751. Shift Solenoid "A" performance of stuck off. i ordered the solenoids(i bought 2 for both solenoids just in case). I put them in, closed up the tranny and dropped the blazer off the lift, filled it up and still no reverse. as i was changing the solenoids i noticed the shafts that sit in the same hole that the solenoids go in(sorry i dont know the lingo, i dont know much about trannys). one felt like it had a spring behind it and the other one didnt, it was just laying in there. i dont know what could be the problem. i cleared the code in hope that it would pop back up again, maybe with a different code who knows. so far it hasnt popped up again but i was only driving it for about 30 mins. does anyone know what the problem may be? Thanks