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01-25-2018, 08:03 AM
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#1 | |
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AF Newbie
Join Date: Nov 2011
Location: Wawa
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case of the disapering rear diff oil
hi
2006 gmc sierra 1500 5.3ltr 4x4 z 71 i noticed on my bi annual check over, that the rear diff was was low about one quarter to has a liter. checked the axel seals pinion seal diff cover. No leaks!! topped it up and took it to the dealerrship. They could not find any leaks what so ever. shook there heads and never saw anything like it. Took the cover off and replaced the oil wit Royal purple and a month later down a quarter to half liter. This oil is all synthetic as required in the manual. 75 90 dumped that oil out added 80 90 dino oil. Month later down again the same amout. Dealer is stumped. Maybe someone has had this same problem and solution. Other than replacing the dif. Thx in Advance |
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01-25-2018, 09:42 PM
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#2 | |
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Registered Offender
 
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Re: case of the disapering rear diff oil
The only other place is the vent tube, if equipped. That's a stumper, for sure.
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01-27-2018, 03:58 PM
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#3 | ||
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Re: case of the disapering rear diff oil
Quote:
Thx for the reply Blue Bowtie The vent hose is also dry and clear or gear oil. I guess the only solution i have is to simple check accordingly and top it up. Thx Again |
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01-28-2018, 10:40 AM
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#4 | |
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Re: case of the disapering rear diff oil
Losing about a pint a month is not right. If it is not evaporating (do you regularly drive to the sun and back?) it MUST be going somewhere. One would think that there would be a trace of it somewhere, such as the brakes, undercarriage, etc. Obviously, it will need to be monitored and replenished until it is resolved. Hopefully, a trace of it will appear somewhere and you can find the leakage.
Good luck, and keep it full.
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| The Following User Says Thank You to Blue Bowtie For This Useful Post: |
sierra13 (01-28-2018)
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01-28-2018, 11:18 AM
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#5 | |
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Re: case of the disapering rear diff oil
thx
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01-28-2018, 04:58 PM
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#6 | |
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A990 racer
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Re: case of the disapering rear diff oil
Did you remove the rear rotors to check the axle seals, this was a common source of leaks on those trucks.
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01-28-2018, 05:30 PM
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#7 | ||
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Re: case of the disapering rear diff oil
Quote:
No sign of any oil anywhere. Rusty and dry 109 490 kms on truck thx |
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