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ss3011 · 10-25-2021, 09:38 AM

I have talked about this before , but deep pans are not designed to increase the cold fill volume , but to lower the fluid level away from the rotating parts . As fluid gets hotter it expands and if that expansion gets the fluid up into the rotating parts it will mix up like a milk shake . That is bad for windage and will also hurt pressure stability , lubrication , and cooling . A deep pan with 2 extra quarts of fluid in the trans will be even worse . Typically you need a re-calibrated dipstick which compensates for the deeper pan .
Since you have a problem with one trans and no problem with another , I still believe a leaking seal is more likely .

10-25-2021, 09:38 AM	#3
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: TH350 Problem I have talked about this before , but deep pans are not designed to increase the cold fill volume , but to lower the fluid level away from the rotating parts . As fluid gets hotter it expands and if that expansion gets the fluid up into the rotating parts it will mix up like a milk shake . That is bad for windage and will also hurt pressure stability , lubrication , and cooling . A deep pan with 2 extra quarts of fluid in the trans will be even worse . Typically you need a re-calibrated dipstick which compensates for the deeper pan . Since you have a problem with one trans and no problem with another , I still believe a leaking seal is more likely .