Check engine code P1870
I have a 1998 Buick Century Custom with a 3.1 V6 engine With 115,000 miles. My Service Engine light came on & it has a code P1870 which from what I was told by aamco tech, indicates that while in 4th gear, and tcc engaged, the ecm has detected transmission slippage. when comparing the input shaft speed to the output shaft speed. and I have foamy bubbles in the fluid on the dip stick, which to me suggest that I have air mixing with the fluid , but the level is good, not even the slightest bit low or over full and the color is slightly red tint .
Is it me , or do I need to have big money ?