In transmition pan there was a yellow part found shaped like a panhead whith a o-ring and a stem on the flat side

no year told
nor if valve stem seals , replaced , can be down heads on with shop air.
PCV not clogged. simple cheap fix.
piston rings bad, are not simple,. ever. nor cylinder scoring.
valve guide super WORN out will make the stem seals fail fast.
(overloads them )
gas in the oil make oil so then, oil rings and stem seals can not to there job.
too much oil in the pan and now foams up bad, overloading all the above.
those are the simple list. not cracked blocks/heads
not bad a valve.
compression tests pass/?

it must be transmission pan! That plastic piece is what is installed at factory when trans is built to plug dip stick hole. When they install dip stick tube they just push the plug into pan it doesn`t bother anything. It has nothing with truck moveing been there since new--- good nluck

That is the plug that seals the dipstick hole when the transmission is assembled. The dipstick pushes it through during final assembly of the vehicle. It is discarded when the transmission has it's first service.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Clogged PCV Valve
The main purpose of the PCV (positive crankcase ventilation) valve is to recirculate blow-by gases back from the crankcase area through the engine to consume unburned hydrocarbons. Blow by is a mixture of air, gasoline and combustion gases forced past the rings on the combustion stroke. The PCV system usually has a tube leading from the crankcase to the carburetor or intake manifold. Vacuum within the engine intake manifold pulls blow by gases out of the crankcase into the combustion chamber along with the regular intake of air and fuel.
Worn Piston Ring Grooves
For piston rings to form a good seal, the sides of the ring grooves must be true and flat - not flared or shouldered - and the rings must have the correct side clearance in the grooves. Normally, automotive ring groove side clearance should not exceed .002-.004. As the pistons move up and down, the rings must seat on the sides of the grooves in very much the same way that valves must seat to prevent leakage. New rings in tapered or irregular grooves will not seal properly and, consequently, oil will pass around behind the rings into the combustion chamber. Worn grooves are usually flared or tapered causing increased side clearances which permit more than the normal amount of oil to pass the rings into the combustion chamber. Excessive side clearances also create a pounding effect by the rings on the sides of the piston grooves. This promotes piston groove wear and, if the condition is not corrected, breakage of rings lands may occur.
Cracked or Broken Ring Lands
Cracked or broken ring lands prevent the rings from seating completely on their sides and cause oil pumping by a process similar to that described in #7. In addition to this, they also lead to serious damage to the cylinders as well as complete destruction of the pistons and rings. Cracked or broken ring lands cannot be corrected by any means other than piston replacement and this should be done as soon as there is the slightest indication of a crack.
Worn Valve Stems and Guides
When wear has taken place on valve stems and valve guides, the vacuum in the intake manifold will draw oil and oil vapor between the intake valve stems and guides, into the intake manifold and then into the cylinder where it will be burned. If this condition is not corrected when new piston rings are installed, an engine is likely to use more oil than it did before because the new piston rings will increase the vacuum in the intake manifold. When gum or deposits on the valve stems are removed - a procedure recommended when overhauling an engine - the seal previously formed will be removed and leakage will be more pronounced. This is particularly true on overhead valve engines where loss of oil may occur on the exhaust valves as well as on the intake valves. High oil consumption caused by too much valve guide clearance can frequently be cured by reaming or nerraling the valve stem. In some cases new valves may also be required. Use of a permanently bonded valve stem seal will give added insurance against oil leakage on complete engine overhauls or on valve jobs. Large Oil Leaks Leaking valve cover gaskets, leaking crankshaft front and rear seals.

This is kind of a filter that is put there during the assembly process. It supposed to attract some debris. It can be removed when you do your fluid, filter change. It only there from the manufacturing company.

dont worry about that it is just a plug that is in the dipstick tube from factory. When they put the dipstick in it falls out and stays in the pan until you get a tranny service and change your fluid and filter

The plug you found is a stop plug that is installed in the dipstick tube hole when the transmission is built. After the transmission is put in the truck, that plug is pushed out into the pan when the dipstick tube is installed.

No worries, you can throw that out. Most people never hear about that because they don't change their own fluids.

If this answer was helpful to you, please rate my answer. Thanks, Rolanddirty.

go undernieth your truck and look up at the bottem of it. if it is anything like my truck you will see your drive shaft easily (the things that runs down teh middle of your car from the engine to the back wheels) the transmition pan will be beside that closer to the engine, it looks like abit of a square (odly shaped) and either black or rusty depending on age of truck. the transmition pan will have around 17-20ish bolts holding it up, unscrew this (get an oil pan for all the oil that will come out) and your transmition filter is just under there. hope that helped

Don't worry about it, that is a plug that is put in the dip stick tube hole during manufacturing. When the transmission is installed they just push the plug on through into the pan. On a good note this lets you know the pan has never been removed. As far as the plug, just trash it. Thanks and good luck.

I have owned a 1999 intrepid for 9 years. And have changed the oil many times in the 170,000 miles I've owned it. This car comes mostly with a 2.7 liter motor. It does some times have a 3.5 liter. As you open the hood,there is a sticker that tells you what motor it has. If you have the 2.7, between the two front wheels you have a cast aluminum oil "pan" You will see a oil filter sitting vertical, towards the passenger side.The bottom of the filter is almost flush with the bottom of the oil pan. Just to the side of the filter,towards the driver side, is a hex head oil plug. It will take a 11/16" wrench to remove it.Hope this helps lbreen