matt 2k12 Posted July 25, 2011 Report Share Posted July 25, 2011 Guys, Over the time of owning this truck I have noticed every now and then a little drop of oil from my differential. I have a 4l60E with a stock rear diff. Yesterday evening I noticed a little puddle under the diff but thought nothing of it really, the truck still drove fine. Then this morning when I was going to work I saw a huge puddle under the diff and just left the truck... Could the fact that my pump may be failing have anything to do with my diff crapping out all the sudden? Or is the diff crapping out just something that happens al the time anyways. It jsut seems too weird that after my tranny lost fluid the truck seemed more sluggish and now looks like my diff took a shit on me... What do I need besides the true-trac unit itself? Any supporting components? Thanks in advance for any help! Matt Quote Link to comment Share on other sites More sharing options...
T-Bag Posted July 25, 2011 Report Share Posted July 25, 2011 Check your gasket and fill plug to make sure it's tight. Just might need a gasket change or loose plug but don't drive it low on oil to prevent damage. Quote Link to comment Share on other sites More sharing options...
tonycillo Posted July 25, 2011 Report Share Posted July 25, 2011 Check your gasket and fill plug to make sure it's tight. Just might need a gasket change or loose plug but don't drive it low on oil to prevent damage. X2 i would start there. Quote Link to comment Share on other sites More sharing options...
chris B Posted July 25, 2011 Report Share Posted July 25, 2011 X2 i would start there. x3 Quote Link to comment Share on other sites More sharing options...
matt 2k12 Posted July 25, 2011 Author Report Share Posted July 25, 2011 Thanks guys... is there a how to on replacing that gasket? Is it as easy as it looks, just unbolt the case, insert gasket, and bolt it back up? What local places carry that rear end gasket? And what rear end do I have anyways?? Quote Link to comment Share on other sites More sharing options...
matt 2k12 Posted July 25, 2011 Author Report Share Posted July 25, 2011 hey guys someone just told me that most rear ends dont have gaskets anymore, just a light coat of silicone... is this true for our RWD trucks? Quote Link to comment Share on other sites More sharing options...
T-Bag Posted July 25, 2011 Report Share Posted July 25, 2011 (edited) http://www.silveradoss.com/forums/topic/15898-how-to-drain-and-fill-your-rear-axle/ Count how many bolts you have, I believe its gonna be 10 for an 04 VHO. Out here, I get CarQuest, Napa or O'Reilly's gaskets. Make sure you clean ur diff cover well with a degreaser, also remove any and all metal shaving from magnet, get a gasket, rubber preferably, now the discussion and debate on the additive or not is up to you. i don't use it, locking rear diffs are different from limited slip posis and I personally believe the additive is not necessary in a locking diff after a lot of readings. Take a look through the entire how to thread, make your best decision, good luck and happy wrenching Edited July 25, 2011 by Bad Ass Silvy (see edit history) Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted July 26, 2011 Report Share Posted July 26, 2011 You can get the gasket right from your Chevy dealer for around $6.......and as stated, an additive is not necessary, if you are using a GL5 rated 75W-90 synthetic gear lube like Mobil 1, the friction modifiers are already mixed in..... Quote Link to comment Share on other sites More sharing options...
matt 2k12 Posted July 26, 2011 Author Report Share Posted July 26, 2011 You can get the gasket right from your Chevy dealer for around $6.......and as stated, an additive is not necessary, if you are using a GL5 rated 75W-90 synthetic gear lube like Mobil 1, the friction modifiers are already mixed in..... Thanks for all the help guys... I'm looking to get this knocked out this evening now that I have spent a day amassing my knowledge (or the knowledge of others) Quote Link to comment Share on other sites More sharing options...
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