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Corvette
C7 Forum
Advice on C7 differential fluid change
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<blockquote data-quote="Afterimage" data-source="post: 286361" data-attributes="member: 7676"><p>Finished it up this aftn. Ended up taking just over 2.8L of fluid that I pumped in before it started dripping out the fill hole. I pumped a tad more so it was a slow steady drip before stopping and getting the fill plug up there and tighten up. A real PITA getting the fill plug up there while trying not to drip too much and wasting the excess fluid.</p><p></p><p>A more of a PITA is the new bottles they put the gear oil in now as seen in the pic. My manual pump screws into the previous bottle shown on the left. Lucky I still have 1 of those bottles that had a couple hundred ml of fluid in from the last change so I had to add fluid from the new bottles to the old one before going under the car and pumping (that means after 1L went in had to climb back up refill and back under 3 times).</p><p></p><p>When I get the car up again for winter storage I'll pull the fill plug and see if I can pump a few more mls in and put the plug back without too much dripping out. I'm finally thinking the diff probably takes more like 3 quarts instead of litres cause 2.8L=2.96qts so close enough to 3qts.</p><p></p><p></p><p>Mobil 1 LS gear oil 75W90:</p><p></p><p>[URL unfurl="true"]https://www.summitracing.com/parts/mob-104361-1[/URL]</p><p></p><p>PetroCanada LS gear oil 75W90:</p><p></p><p>[URL unfurl="true"]https://lubricants.petro-canada.com/en-ca/brand/dexron-product[/URL]</p></blockquote><p></p>
[QUOTE="Afterimage, post: 286361, member: 7676"] Finished it up this aftn. Ended up taking just over 2.8L of fluid that I pumped in before it started dripping out the fill hole. I pumped a tad more so it was a slow steady drip before stopping and getting the fill plug up there and tighten up. A real PITA getting the fill plug up there while trying not to drip too much and wasting the excess fluid. A more of a PITA is the new bottles they put the gear oil in now as seen in the pic. My manual pump screws into the previous bottle shown on the left. Lucky I still have 1 of those bottles that had a couple hundred ml of fluid in from the last change so I had to add fluid from the new bottles to the old one before going under the car and pumping (that means after 1L went in had to climb back up refill and back under 3 times). When I get the car up again for winter storage I'll pull the fill plug and see if I can pump a few more mls in and put the plug back without too much dripping out. I'm finally thinking the diff probably takes more like 3 quarts instead of litres cause 2.8L=2.96qts so close enough to 3qts. Mobil 1 LS gear oil 75W90: [URL unfurl="true"]https://www.summitracing.com/parts/mob-104361-1[/URL] PetroCanada LS gear oil 75W90: [URL unfurl="true"]https://lubricants.petro-canada.com/en-ca/brand/dexron-product[/URL] [/QUOTE]
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Corvette
C7 Forum
Advice on C7 differential fluid change
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