I'm trying to remove the axles on my 9 inch Ford (1969) rear end (small bear housing) so I can do some rear end work (add posi traction unit). I removed the 4 bolts that hold the axle bearing retainer but the axles won't come out. They won't budge. I suppose I'll have to rent an axle puller from Autozone or O'Reilley. Before I spend the rental money, any other suggestions to remove the axles? Maybe slightly heating the axle housing near the bearings to possibly make the axles a littler easier to remove? Any thoughts or experiences or guidance is appreciated. Thank you.