[impalassdggm]

From what I have heard is typically the second shift solenoid is the only one that goes bad (the solenoid that controls 3rd and 4th gear). Pending on how many miles your car has on it (and how you drive it) should determine whether or not you should replace. The Aurora that I did it on had around 160,000 miles on it, and had been driven relatively hard. I just decided to replace the transmission. I was good in making this decision, because yes, the shift solenoid was bad on this car, but if I would've replaced the solenoid only, my tranny would've had around 5,000-10,000 miles left on it. There was virtually no friction material left on ANY of the transmission bands. Plus, the filters (there are 3!) were extremely clogged with metal particles. I think if it's a high-mileage car, it's worth it. Unless you're a risky person and trust these transmissions to last 200,000+. I do have to say one thing, after replacing this transmission, I have never felt this car shift so smooth. It has made this car a joy to drive once more. Before the shifts were sloppy and took about 1-2 seconds to fully engage into the next gear. Now the shifts are instantaneous, and I can't even feel them...WOW. If you want to replace the solenoids, they are fairly easy to replace and outlined on AllData. Later!