As long as you didn't keep driving it you should be ok. If it was not doing this before the shift kit then something went south when going back together. Just take it back apart and inspect. You can save the trans fluid if you use a clean drain pan and filter the fluid if you do not want to buy another 7 quarts. I would buy the correct spring for the accumulator. You can buy the 2-3 spring for use in the 1-2 for a more firm shift.