My 2004 2500HD LLY diesel Allison transmission is leaking trans fluid anyone else having this problem. Going to try to get into garage this week. Leaving for Florida Thursday worried about the leak. Hope problem is minor.
Hi ekrott, You may want to determine where it is leaking from. This may help people identify if they had similar issues as your's does. Are you sure it's tranny fluid? Not trying to be smart. How much fluid have you lost? Does it do it while idiling? Hot or cold? An occasional drip, or a steady drip? Has it been covering the underside of your vehicle? I think you get my point, it will help people if they know more about your troubles. Not trying to be smart.
Only seems to leak after it has been driven then parked. Getting some fluid on under carriage. Hope to get it to dealer will let you know results. Cold temp check looks like it's down 1.5 quarts with 1300 miles on truck. Not sure I did cold check correctly manual says temp should be 160 - 200F but not sure it's talking trans or engine temp manual neglects to say which.
Well so much for the Allison realiability myth. New Allison with 1350 miles takes a crap. Service dept says looks like pump is leaking fluid lost 2 quarts in 1350 miles. Something about a new rubber seal that Allison is using. Also probably have to replace torque converter. Dealer service dept is going to fix it.
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