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dlbrack 01-13-2006, 12:59 AM Getting ready to change my front & rear diff. oil this weekend, thinking about mobil 1 ( first diesel / 4x4 ) I know this is a rookie question but where is the fill hole on the front ? I can see the drain but not where to fill it ! Iv`e done the rear`s before but never a 4x4 :help: 66flh 01-13-2006, 01:04 AM Valvoline is alot cheaper i think its just as good .-Valvoline SynPower 75-90 is what its called.Full synthetic 6.50 a quart.. specialagentPK 01-13-2006, 01:45 AM I really cant explain it well other than its reacessed at the side of the diff on the drivers side. ob_1jr 01-13-2006, 01:59 AM it is above the drain plug. It is number one on the picture below. http://imagecloset.com/8/thumbs/t_01351213diff.gif (http://imagecloset.com/8/01351213-diff.gif) sometimes pictures are worth a thousand words. ):h dlbrack 01-13-2006, 07:18 AM You got that right, I know where to look now! Thanks a bunch guys CottonWoodBlues 01-13-2006, 03:44 PM Valvoline is alot cheaper i think its just as good .-Valvoline SynPower 75-90 is what its called.Full synthetic 6.50 a quart.. :exactly: What 66 says. I've been using it in my '01 D/A, and now I'm using it in my '06 LBZ. It's your money. But you knew that... CWB bobo 01-14-2006, 12:21 AM I used Ams Oil severe gear 75-90. Works great. dlbrack 01-14-2006, 09:46 PM Went W/ the mobil 1, After spending 40+ for the truck whats another 50 - 60 bucks. Planning on haveing this one for a long while.The tin foil worked good over the skid plate to keep oil from running every where. Easy do it your self project, although need funnell W/ long flexable tube to fill front diff. Thanks for the input!! Dal | ||