How’s it going so this is my first infinity I’ve ever owned I love the car till now ! It’s a 2008 infinity G35 with 108k miles sedan

So the problem started last week 5/2/19 Transmission started shifting hard in every gear (not slipping) goes into every gear just clunks really hard oils are good an everything has a code for

B2604 - PNP switch

First thought it could be a transmission mount but it’s not

wired part is paddle shifters stopped working and it doesn’t go into DS mode but when we reseted the codes and the problem stopped and didn’t shift hard anymore but eventually codes came back and started shifting hard again

would really appreciate any feed back thanks in advance