Try to buy the transmission fluid for my DT12 transmission but all I found was "gear oil 75w-90" ,wondering if it's the same thing.Also can I use the same type of oil (gear oil 75w-90) for the differential? Thank you.
Is that gear oil and transmission oil are the same thing?
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by jimmyboy, Jan 7, 2018.
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My transmission uses 50 wt synthetic oil
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75wt 90. Okay for diff.
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See the DT12 brochure in the attached link-
Detroit™ DT12™ Automated Manual Transmission - Demand Detroit | Freightliner Trucks
Looks like 75w85 or 75w90 is correct. Check with your local dealer to get the correct lube type if your transmission is still under warranty. -
Here you go...
DT12 Transmission Oil Approved List -
Thank you everyone for information.
One more question. My DT12 transmission come with 750,000 miles warranty. Does it mean, it doesn't require any oil cange up until 750,000 mile? -
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A warranty covers stuff that breaks due to manufacturing defects. Lack of proper maintanence will void a warranty nearly 100% of the time.AModelCat and Broke Down 69 Thank this. -
Just to be clear if you do this yourself. You must use transmission lubricant. Not!!!!!!!! 75w90 gear lube. They are not the same thing. Take the time to look at the fluid specs and get the correct lube.
jimmyboy and Broke Down 69 Thank this.
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