We are always asked as to the correct placement and quantity of the direct
springs in the 4+3 overdrive. The factory setting used a load of 1250
lbs. This load was achieved by removing or adding springs. The problem
was that sometimes you will have an odd amount which leads to uneven loading
of the piston. Doug Nash also did not make it a point to evenly space
springs, which of course resulted in more uneven pressure. If you look
at the below image you will see how we like to place the springs. We evenly
space them around the threaded access plugs. We remove the center spring
where the "X" is.
means we have 18 outer and 15 inner springs. We found that this method
gives good holding power as well as even load on the piston and bearings.
An important point overlooked by most rebuilders is that when the overdrive
slips and burns up, the heat generated usually collapses the springs and
yields a weaker pressure. We stock new springs.
Outer Spring No. Is: 14081182
Inner Spring No. Is: 14081183
Home Page ] [ Overdrive