Even though your 400 package has all the
ATI components, it may need some finishing
touches to make it into a good working
A few things I could
suggest: main line pressure should be
between 180 and 210; teflon seating rings
need to be used; you need a 1/16 bleed
hole in the drum, it may be trying to
apply high gear clutch in the top of low
gear. Thats why we use a bleed hole
in the drum.
For the same reason,
we usually dont peak out the motor
in low gear. In other words - short shift.
At least on the 1-2. This is also why
most trans brake manufacturers use stiff
springs in the direct drum.
Clutch pack clearance
in the high clutch should be .050-.070.
Also, normally the ATI aluminum drum (if
that is what you have) wont accept
very many clutches. It needs 5 or 6 in
the forward and direct packs.
Try these tips and
see if they get more life out of your