leaking th400

richie 2 · 08-15-2020, 01:31 PM

ok tks everyone! milodon unit installed, nice piece.... . marked the gasket/panrail installed height on dipstick. i have an additionail .125'' more capisity before level would reach the modulator valve bore. (which i believe is the seepage) sooo where does the operating level go? above or below the pan rail & gasket height? new fiber gasket to be install dry.

Hacksaw · 08-15-2020, 04:12 PM

The best / sure way to check dipstick height is to get a stock dipstick tube and stick. Insert in the trans and with the pan off measure in relationship to the pan rail. Transfer this known height to your new / aftermarket stick. This way you can't be wrong.

Mark Ugrich · 08-15-2020, 07:52 PM

The add one pint level is about 1 1/4” from the tip of the dipstick on a stock piece.You can figure about another 1/2” to the full mark.Although it’s permissible I don’t usually run the oil level right at the full mark.Make sure you’re checking the level with the engine running/trans in park or neutral. With the engine off and the trans sitting the fluid level may well be above the full mark.
I would try the oil level right where you have it.Again, road test and heat cycle the trans.Then check the level.If the level when hot is above the .125 you measured,lower the level until it is even or slightly below.

08-15-2020, 01:31 PM	#1
richie 2 Senior Member Join Date: Feb 2009 Posts: 971 Likes: 426 Liked 205 Times in 93 Posts	Re: leaking th400 ok tks everyone! milodon unit installed, nice piece.... . marked the gasket/panrail installed height on dipstick. i have an additionail .125'' more capisity before level would reach the modulator valve bore. (which i believe is the seepage) sooo where does the operating level go? above or below the pan rail & gasket height? new fiber gasket to be install dry. Last edited by richie 2; 08-15-2020 at 01:35 PM.

08-15-2020, 04:12 PM	#2
Hacksaw Senior Member Join Date: Sep 2016 Posts: 884 Likes: 206 Liked 310 Times in 174 Posts	Re: leaking th400 The best / sure way to check dipstick height is to get a stock dipstick tube and stick. Insert in the trans and with the pan off measure in relationship to the pan rail. Transfer this known height to your new / aftermarket stick. This way you can't be wrong.

08-15-2020, 07:52 PM	#3
Mark Ugrich Member Join Date: May 2011 Location: Auburndale,Florida Posts: 220 Likes: 29 Liked 71 Times in 38 Posts	Re: leaking th400 The add one pint level is about 1 1/4” from the tip of the dipstick on a stock piece.You can figure about another 1/2” to the full mark.Although it’s permissible I don’t usually run the oil level right at the full mark.Make sure you’re checking the level with the engine running/trans in park or neutral. With the engine off and the trans sitting the fluid level may well be above the full mark. I would try the oil level right where you have it.Again, road test and heat cycle the trans.Then check the level.If the level when hot is above the .125 you measured,lower the level until it is even or slightly below.