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DIY: Differential Fluid Change


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Heres a quick tut for changing out your differential fluid. Its not hard at all. So now you dont have ...


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Old 06-28-2010, 05:58 PM   #1 (permalink)
 
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Default DIY: Differential Fluid Change
Heres a quick tut for changing out your differential fluid. Its not hard at all. So now you dont have an excuse to not do this at the recommended intervals.

Step #1 Gather proper tools and equipment.

You will need a 3/8" drive socket set, enough diff fluid of the proper weight, an oil pan, bucket, or something to catch the old fluid in, and some sort of heavy duty cleaner or degreaser (i used brake parts cleaner)

you might also need some RTV if you dont have a gasket on your cover.

[imgl]http://i26.photobucket.com/albums/c114/OlDirtyJohn/DSC_0015.jpg[/img]

Step # 2 Place drip pan under Diff, and start removing Bolts

You need to remove the bolts starting from the bottom and work your way up. This will allow the fluid to start draining without making a huge mess.







Step #3 Allow fluid to drain and remove cover

Wait a few minutes with only the top two bolts loosely in place for the rest of the fluid to drain out. Next remove your cover.







Step #4 Clean out pumpkin/cover and inspect Gears and Gasket

Using a clean rag wipe out all the excess fluid from the bottom of the differential. Use this time to inspect your gears for any abnormal wear or chips, or anything out of the ordinary. DONT USE CLEANER INSIDE THE DIFF!! you most likely wont be able to get it all out, and it could prematurely break down the viscosity of your new fluid. Next, inspect your cover gasket if equipped, and clean out the inside of the cover using the cleaner of your choice.





Step #5 Optional Step

If you have been wanting to get a new diff cover, but dont want to spend the money, you can paint the cover with a can of high temp paint and replace the bolts (I used grade 8 bolts, got them from NAPA), the results will surprise you! And it only takes a few minutes.

Step #6 Replace diff cover

Line up your gasket, or apply RTV gasket maker according to the directions on the package, and put your diff cover back on. torque down bolts according to specs. (in my case it was 30 ft/lbs) I also torqued bolts down in a criss cross pattern to avoid warping the cover.

Step #7 Fill Diff with Correct amount of fluid

To take out the fill plug simply use a 3/8" drive socket wrench. Next fill with diff fluid. (my 10.5" rear took 3 quarts) fill until fluid is just below the fill hole. Next replace fill plug, and torque to specs (24 ft/lbs)







Step #8 Stand back, and enjoy the fruits of your labor

Also, check for leaks. Those are bad.

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Last edited by OlDirtyJohn; 06-28-2010 at 06:02 PM.
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Old 12-16-2010, 12:40 AM   #2 (permalink)
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What are the size of the bolts by chance? Is there any difference between the 1500 and the 2500 bolts other than how many you need
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Old 12-16-2010, 07:13 AM   #3 (permalink)
 
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Great job John! Nice write-up!


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Old 12-17-2010, 01:24 PM   #4 (permalink)
 
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Originally Posted by korby05 View Post
What are the size of the bolts by chance? Is there any difference between the 1500 and the 2500 bolts other than how many you need
are you talking about the head size? or the thread size? i dont recall off hand. all i did was drive to NAPA, take one out, take it in with me, and find a match.


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Old 12-17-2010, 05:23 PM   #5 (permalink)
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makes sense.. that's what I would have done anyways.. thanks again
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Old 03-06-2012, 06:06 PM   #6 (permalink)
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I know this is an old post but I just changed my rear diff. fluid and the plug on the diff. cover is basically a rubber stopper. It fits pretty snug. Is this normal?

I have an 03 Ram slt 4x4 with the Hemi

Thanks

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Old 03-06-2012, 06:14 PM   #7 (permalink)
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I know this is an old post but I just changed my rear diff. fluid and the plug on the diff. cover is basically a rubber stopper. It fits pretty snug. Is this normal?

I have an 03 Ram slt 4x4 with the Hemi

Thanks

PJ

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Old 03-06-2012, 06:34 PM   #8 (permalink)
 
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Yes. It needs to be to keep the oil from splashing out or pouring out.


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Old 03-06-2012, 08:52 PM   #9 (permalink)
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Thanks

So the one in the Pic up top is rubber also?? Cause mine dosn't have the place for the wrench. I just pryed it out with a flat screwdriver. Was under the impression it was a bolt or sorts.

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Old 03-06-2012, 09:08 PM   #10 (permalink)
 
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His doesn't seem to be, may be an aftermarket cover. But mine is.


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