I'm going to change my '98 Tacoma 3.4L 4x4 manual from Redline 75w90 to 75w85 to help with cold shifting. MoleKule once recommended this to me. Should I also change the transfer case over to 75w85? I've heard that it's a good idea to keep them filled with the same oil just incase they have a little bleed through and end up sharing oil which makes sense. BUT would the transfer case also being filled with 75w85 help with cold shifting? This is on a short tripped daily driver.