Low Quantity (1 quart) in Differential
Hi Folks. I checked my differential on our 2K8 Chevy Turbo Diesel 4x4 and it was a quart low. Have I damaged anything? Where did the fluid go? There are no signs of leakage. The differential was supp...
Forum Discussion
Have you changed the fluid in the diff before? The rear diff takes about 3.5 quarts for a fluid change.
Only use a GL5 grade synthetic fluid in the front and rear diff. Limited slip additive is not needed.
I changed mine after 600 miles of towing and when I added a PML diff cover.
All the GM diffs come from the factory "low" on level.
From my owners manual (was the same for my previous 2005 D/A).
For all 6.6 L Duramax Diesel 2500HD Series applications and all 3500 Series applications, the proper level is from 17mm to 21mm (0.6 in to 0.8 in) below the bottom of the fill plug hole, located on the rear axle. Add only enough fluid to reach the proper level.
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Liquids will expand and too much can lead to foaming, churning of the lube and pressure build up resulting in blown seals.
I have filled the rear diff until it starts to seep out of the fill plug and it did not create any problems. This would be over-filling per GMs standards.
Only use a GL5 grade synthetic fluid in the front and rear diff. Limited slip additive is not needed.
I changed mine after 600 miles of towing and when I added a PML diff cover.
All the GM diffs come from the factory "low" on level.
From my owners manual (was the same for my previous 2005 D/A).
For all 6.6 L Duramax Diesel 2500HD Series applications and all 3500 Series applications, the proper level is from 17mm to 21mm (0.6 in to 0.8 in) below the bottom of the fill plug hole, located on the rear axle. Add only enough fluid to reach the proper level.
***************************
Liquids will expand and too much can lead to foaming, churning of the lube and pressure build up resulting in blown seals.
I have filled the rear diff until it starts to seep out of the fill plug and it did not create any problems. This would be over-filling per GMs standards.
