Transmission fluid

Asked by Special_648 Jan 14, 2017 at 01:09 PM about the 2008 Chevrolet Silverado 2500HD LTZ Crew Cab 4WD

Question type: Maintenance & Repair

08 duramax 6.6 allison trans calls for 7.4 qts drain
and fill i replaced trans lines after they blew off
while driving and replaced trans cooler have about
10qts in it and still reads on cold part of dipstick

2 Answers
223,905

Rowefast answered 7 years ago

Make sure it is all warmed up, taking it for a ride, or just shifting it threw the gears with foot on the brake, checking the fluid level. Keep checking and adding fluid if necessary until full.

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F_O_R answered 7 years ago

The 7.4 quarts is for a normal drain and re-fill. Blowing the lines off may have allowed the transmission pump to pump out fluid from the torque converter as well which would result in needing more ATF.

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