ok.. i have a 98 expy. the rear end was leaking so i got a gasket and the syntheic oil.. here is my problem. both of my repair manuals state there is a oil fill plug in the front side of the rear axle housing. i can not find that plug. i can only find a sensor that is near the top of the housing. if i take off the sensor i can fill it from there. but how much oil to put in to it.. both manuals state to put 5.7 pts of oil in.. which is almost 3 quarts. i can not feel the oil when i put my finger in the hole as stated in the repair manuals. so i put in another quart with is now 4 quarts or 8 pints. and still can not feel the oil. i have both tags from the rear axel housing.
tag 1
75w140 synth
oil only

tag 2
S 935 C-1
3L7.3 9 7.5 7H04

what gives.
Thanks for the help
richard

 

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If it's like Fords other differential housings......the plug is on the right side of the housing (if youre facing the driveshaft side)...above the webbing of the housing. Sometimes it's a tricky angle to get to depending on your relative position. It should be a square-recessed plug...for 3/8ths rachet or extension to fit it. Your oil level should be just below that hole, any higher and it may blow out of the vent in the housing.