My stock gt trans is finally done after 245k miles. So I plan to swap to a spare gtp trans that I have sitting around the shop. I have HPTuners v3.0 and I believe that I only need to change the Drive Sprocket Ratio under the speedometer tab from 1.000 to 1.121. Is there anything that I need to change under the transmission tab? I am new to tuning and could use all the help I can get. Car is a '99 GP GT.