Transmission Vent

By macguy
May 26, 2010 in 2000-2014 Silverado HD & Sierra HD

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macguy

Posted May 26, 2010

Does the 6L90 have a fluid vent? Reason asking, if fluid fill is too high when hot, does it vent out? I checked mine at 165 degrees, and fluid is below cross hatch for hot. According to owners manual fluid should be in hot zone between 160-200 degrees. So I added very little dexron VI. Will check tomorrow after long hot trip.

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