Still shifts wrong, only 2nd to 3rd
I had transmission issues, 1st would take a long time, if ever, to shift to second and second would skip to third a lot and it leaked fluid like crazy so I have now replaced it with a used one from a salvage yard. I didn't at first remember to put the tv cable spring back so the new one didn't shift right either, but I now remembered to put it in and now its much better, but I still have a issue. First to second is fine, on a normal stop to highway speed it will shift to second at about 2k perfectly, but then it almost immediately shifts to 3rd. (RPM goes to 1.6 then to 1.4) Then there is no acceleration and it dogs, once it catches up to speed again the shift the 4th is at the right time (around 1.8k to 2k) If I try to punch it while its in 3rd to get it to upshift back to 2nd it doesn't and just chugges along. I can use the shifter to force it into 2nd and then put it back to D when its at speed. If I start in 2 and it shifts fine to second, I then wait until I get to 2k then put it into D everything is perfect. At first I figured its the tv cable still off but would that not effect all shifts not just 2nd to 3rd? What all factors are used to determine the shift time, could the computer be messing up? Fluid is fine, normally the 1st to 2nd is effected the most with low fluid (learned that from the other tranny) Is there a specific valve, solenoid, spring, ect... that would cause it to mess up just that gear? Other odd thing is it shifts almost perfect if I am towing, lighter the load the worse the issue. Also sometimes it shifts perfect, normally when its been on the road a while but not quite full temp. Any other ideas?