On the driver's side of the 3rd member (the big iron chunk that mounts to the axle housing) there is a plug about 3/4" diameter with a square hole for putting the end of a socket wrench in to remove the plug. Then just fill with gear oil until the level is up to the hole.
Just prop it up first so it's sitting at the same angle as in the car so you don't over or under fill. Pick up a gear oil hand pump for a few bucks at the parts store. Makes it so much easier to do under the car.
By far, the easiest way I know is to install the center section and one axle. Remove the drain plug for a reference for the level of the oil, and then pour the oil in the end of the open axle tube. Normally it takes 5 pints of oil to fill a 9" rear.
If you don't have a filler plug, then this is your only option (short of punching a hole.).
393W Stroker, Wide Toploader 4 Spd, 9" 3:70 Posi
Victor Jr. Heads, Stealth Intake, 750dp, 236/561 Solid Cam, 9.6CR, 1 3/4" Headers, Lakewood, Subframes, Caltracs
<font size=-1>[ This Message was edited by: dennis111 on 7/10/06 6:29pm ]</font>