i'm helping my friend do this setup on his rig, when it comes to modifing the pump, how can you do it without making the pump squeal like crazy. we drilled the restrickter to 7/32, pump squealed, drilled it out two sizes smaller same thing. what are we doing wrong. my friend put back a stock restrickter and the noise went away. please help.
From what I found, the guys who had a squaling issue after the pump mod were not running a cooler or some kind of additional fluid. When you drill the restrictor with stock capacity fluid, the fluid doesn't have enough time to cool. With my cooler added, my capacity is roughly 2-2.5 qts. You can usually get a decent tranny cooler from a parts store for $30-$40.
