I was taking my friends 5.29s off his hands the other day and had the same problem.  it took a lot of wiggling and someone twisting the other shaft to move the gears and make everything loose.  we got fed up with it and cut the dam axle housing with a sawzall.  after we did that then the freaking thing came right out.  but the problem was we didn't have the right angle on it.  let me guess its the long side on the axle right?  just keep trying.