Transmission problems after fluid change
 

hello all! is a 01 chevy blazer LT 4.3L Vortec V6 when I remove the A/T pan to change the filter n gasket the pan stuck in the cross member and I broke one shift solenoid because was hard to pull it down. So anyways put new one on it and when i try to put the filter don't fit with gasket, the trany look like it has one from the other filter so i try to take out but when I rip off the plastic if look like the gasket or "O RING" came with the trany if so I scrub up my trany because the filter is loose now and the other O RING don't fit on it.
So after I put the new filter n gasket put the pan back n fill with fluid start the blazer for test n revers is to slow to engage n the truck driving and "D" is to slow when the transmissions gear star changing the rpm jump from 1500 to 3000 and it pulls and 2, 3 gear, before was running at 65 or 70 m/h at 2000 rpm and now is running at 3000 rpm. So what is my problem the filter because don't had the O RING and is no tie, or the shift solenoid A and B are different??? please somebody help me!!!:icon_doh:

Are you getting a trouble code? Its more than likely a solenoid. They are different and I was told to replace both at the same time. There is a 1-2 solenoid and a 3-4 solenoid, but I think both are the same part just in different locations. I'm not at all an expert with the trans, I prefer to just seal it up and leave it be. However I am having the same problem, but not after a fluid change.

Earlier this week I got a P0753 code, basically a faulty shift solenoid A.. She still runs, just super high RPM on the interstate, and off the interstate its basically stuck in 3rd gear. Even if I pull it manually down into low. So I'm changing both solenoids while doing a fluid and filter change this weekend. Probably going to put in an entire bottle of lucas oil stop slip with the new fluid too. I'll see how it goes.

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she is running good now! I had to remove the pan again to make sure i plug the solenoid n i fount the filter was in the bottom of the pan because the seal was bad n the filter not was sealing right so after take the old seal off n put the new one she is running good.
So my problem was because I don't change the old filter seal... but thank for you input n you help..