toban
Canada
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Joined: 10/31/2003
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I have a 2004 DSDP. Once I've driven a few miles ( under 25 miles) after a differential oil change, do you have to go back and have the oil level checked again? Will the oil "settle" and need to be topped up? I changed from 80/90 to 75W/90 semi synthetic gear oil.
Toban
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pcm1959
St Augustine, FL
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Joined: 01/23/2007
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Whether or not it will "settle" or not I do not know. However, just like rechecking and topping off your crankcase after an oil change, I do the same with the rear and front diff. as well as the tranny. PCM
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chasfm11
Dallas/Ft Worth Areas
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Joined: 02/28/2004
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I've changed my differential fluid (80w-90) several times myself and never found a difference in the level. I do check it according to the schedule in the chassis manufacturer's manual (Freightliner). I also check the breather on it's schedule.
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Norm Payne
Livingston, TX
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Once you fill the rear differential there is no need to check the level unless you find a leak.
Norm
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CaBoy
Junction City, OR USA
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Norm Payne wrote:Once you fill the rear differential there is no need to check the level unless you find a leak.
Ditto Norm.
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Takereasy
South Texas near Victoria
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I disagree. Depending on what type of fluid change you did. If you have floating axles, which you should, the gear oil in the pumkin also fills the oil bath cavities for each wheel bearing. If the rear diff was drained, and the axle tubes swabbed out, then yes, you will need to drive a few miles and do a few turns then recheck it. If they did not bust the floating axles loose, then you shouldn't have to worry about it although it only takes a few minutes.
I can't say I ever drained a diff and refilled it without draining the bearings and cleaning those and the axle tubes. Kinda of like draining the tranny pan and not the torque converter.
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itsalleasy
USA
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Joined: 07/20/2007
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Another for recheck. Gear lube is heavy and has a long way to travel up the axle tubes. It only takes a few seconds to pull the plug and make sure it is filled.
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armadillo 17
Jamestown, OH USA
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Joined: 09/04/2003
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I spent $4500 this Summer replacing the differential, due to my lack of checking it. I learned that lesson well.
Jon and Susan in S/W Ohio
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bill h
el segundo
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I serviced a rear axle on my chev pickup. A little later, a recheck showed it to be low. Since then, I have had varying results on various vehicles, but I always do a recheck. A neighbor did not do a recheck, and saw his wheel and axle come out sideways in his rearview mirror, owing to a dry bearing. He shoulda stopped when the noise started, but no giant harm done. He was lucky.
Bill and Susan
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