can someone give me advise on a 4l80e trans rebuild? i bought a atra rebuild book for it, but it does not list special tool numbers for installing teflon seals on. should i just put them in hot water so that they stretch enough for install? but the main thing i am having problems with is installing the lip seals on the clutch packs, they won't go in without getting distorted. does anyone have a trick for install or can provide a tool number for them? i am helping my friend with it, it is for a 92 burban 4wd. it is the first gm trans rebuild for me.