Auto tranny not shifting

[Extremities]

I posted about this a few days ago and said that I needed to get a new battery. Well, my new battery is in and I'm still having shifting problems on my 98 spyder gs. When I first start the car up, it shifts but only to second gear. After that, from a dead stop (red light, stop sign) it doesn't get any real power until 2500 rpms and doesn't shift. At that point I'm only going maybe 10 mph and when I'm at 55 mph, I'm at about 3500 rpms, again, not shifting. I changed the speed sensors and it fixed the problem for roughly a week. HELP!!!

 

[jjaycxj]

Did you check the fluid?

 

[Lou98GSX]

check for codes and post them

 

[Extremities]

I'm checking the codes tomorrow and I'll post them. And yes, I have fluid.

 

[GDNF2ET]

Make sure your TPS is adjusted correctly..

 

[herms99gst]

When your driving from a stop, is it reving like a car would if the clutch was slipping?

 

[Lou98GSX]

just in case you had the key on and disconnected something and set a code by mistake you should right the codes down then erase them and then drive the car and see what codes come up.

 

[Extremities]

When your driving from a stop, is it reving like a car would if the clutch was slipping?

I wouldnt really know. It's my first car.

Make sure your TPS is adjusted correctly..

I'm really new at this. How would I go about doing that?

I ran the code and it came back with an o2 sensor. Could that cause shifting problems?