my 4 runner is taking time to change gear and a long time to go in od new oil in on 2003 Toyota 4Runner

got new engine oil and box oil there is no lights on the dash just started to do it yesterday

Asked by for the 2003 Toyota 4Runner
did you use the proper fluid in the trans or just a generic?
wot is the best to use in the gear box and how much do u put in it cheers