Soo the other day i hit bump little hard and sadly my dodge doesnt have best shocks, but same day my truck hit 260 so i shut it off and what not. Later i was working on figuring out what my overheating problem is so now i think i fixed it ,but as soon as i get her in 2 gear she sputters and my lights dim my check engine light comes on and stalls. It starts up everytime also ice rev it up in park/nuetral up to 3500 doesnt die also run her in strictly 1 gear up to 3500rpm and doesnt die on me but as soon as i either put it strictly in 2 gear or it shifts into second everything goes wrong. Also i thought what if i ran truck in reverse and went roughly same speed see if itll die it shows no sign of quitting. Please help

 

Something binding in the trans? There aren't any electronics involved for the 1-2 shift........