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You can buy a filter relocation kit that places the filter at the back of the pan-for 4l80E and TH400. We make a baffle that stops slosh towards the rear on all our T/brake drag race trans,and on our U4 trans we make a circular baffle that helps stop fluid slosh in all directions. On our U4 builds we also run a high mounted big catch can with a top filter and bottom tube inlet- it's quite common for these trans to puke a bit of oil as they get hot- any puked oil rises into the catch can but can then drain back into the trans in 'quieter' periods during the race. It works for us.
