Ok I know that you have to go into speedo and change the final drive from 3.29 to 3.69 for this and commit that change. My question is do I have to do a full write after this? I did this and did a partial write and my Tim King trans is shifting really hard like its in max adapt and maxing the line pressure. I can hear the pump whining too. This is the same thing that happened last time after I got it from him new. And eventually after a few thousand miles I had to send it back for repairs.