I decided to top off the fluids in my T-150 and Dana 20. I thought it would be easier to just take off the shifter on the T-150 and fill it until fluid started coming out the fill plug. Check. After that, I went to the t-case and took off the fill nut (to top it off) and fluid started flowing out. I let most of it out thinking it would not be good for the t-case to be overfilled. It sure looks like the two components share fluid but it might be allowing the tranny to run a little low. Can/should I refill the tranny and keep the t-case a little over full?