I have an Infiniti G25 2014, 171k

Automatic shifting from 1st to 2nd gear, and when I pop it in reverse, is pulling hard every now and then. I did a fluid change, and it helped a bit but it's still pulling. Should I drop the pan? Clean/change the filter? Also, how long do you suppose I have until the trans is shot?

Also, I have an Audi Q5 2010, 153k (love this car) that was bought in Washinton but now I live in Texas. The brakes squeak at the end of a stop. And the struts squeak when going over bumps. Do you reckon it's something to do with the change of climate? 

Thanks!