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  #1  
Old 07-20-2010, 01:15 PM
downonmonday downonmonday is offline
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Default Rear Differential fluid amount

I bought my 2004 Dodge Ram 1500 Hemi Sport 4x4 used this past February with 81000 miles on the odo. I am creeping up to 92,000 now and decided to change the rear differential oil (last week I replaced the tranny fluid and filters). On this forum and along with other forums I see owners putting 2.5-3 quarts of oil in their differential. I put 2 quarts of Royal Purple (and Dodge additive) and it is right at the bottom of the fill plug. Why is my differential taking less than others? I have checked it everytime I stop (I have now driven 90 miles with the new oil change) and still right at the bottom of the fill plug. Any help is greatly appreciated! Thanks.
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Old 07-20-2010, 01:20 PM
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That is about right. The axle tubes hold a little, so unless you let it drain for a while and raise each rear wheel seperately and let the tube drain, you are gonna have some left over fluid. No biggie, don't worry about it.
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Old 07-20-2010, 01:21 PM
downonmonday downonmonday is offline
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Alright, thanks for the response! This is my first 'real' truck so everything I do is new to me and just a little paranoid. I was super paranoid after doing the tranny oil change. lol
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Old 07-20-2010, 01:48 PM
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when you changed the tranny fluid, did you make sure to change the line filter, not just the flat filter? Also, not sure about a 2004, but read the owner's manual and see whether you check the fluid level in "N" or "park"...in years past it used to be different for different vehicles. On my 2003, its checked in Park, so I assume 2004 is the same.
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Old 07-20-2010, 02:10 PM
downonmonday downonmonday is offline
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Oh yeah I changed both filters for sure. I checked it in N. I thought that was an unwritten law. I better check my manual.
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Old 07-20-2010, 02:44 PM
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Doesn't matter if it's park or neutral. The only difference is the park pawl being engaged.
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Old 07-20-2010, 02:49 PM
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I know on my 99 durango, it said to check in neutral...the Ram says to check in Park. So just putting it out there.
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Old 07-20-2010, 04:01 PM
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Well, my owners manual said to check it in Park. I went ahead and did that and it read a quart low! It's up to speed now.
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Old 07-20-2010, 04:27 PM
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Good catch...simple things like that can make a difference.
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