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The purpose of an Automatic Transmission is similar to that of a manual transmission, the auto tranny's primary duty is to allow the engine to operate in its narrow range of speeds while providing a wide range of output speeds.
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What is this? Why is it in my oil pan?

June 11th 2020, 2:11pm

Rebuilt my 4.3 and before I drop it back in I’m cleaning up the subframe/transmission. Decided I may as well drop the oil pan so I can replace the filter and weld in a drain plug so, you know, I can actually drain the pan.... upon dropping the oil pan I found this inside.So as the title states, what is this!? And why is it in my oil pan?? It feels gooey and stuck to the bottom almost like it was put there not just floating around then settled.
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Re: What is this? Why is it in my oil pan?

June 11th 2020, 2:12pm

Close up
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Re: What is this? Why is it in my oil pan?

June 11th 2020, 2:28pm

It's a magnet, to collect garbage.

Re: What is this? Why is it in my oil pan?

June 11th 2020, 2:39pm

10-4. Thanks!

Re: What is this? Why is it in my oil pan?

June 11th 2020, 3:12pm

Get some brake clean and clean the whole pan real good, that's the transmission pan not the engine oil pan though. While you have that off replace the trans filter and make sure you get the old o ring seal out of the transmission.

Re: What is this? Why is it in my oil pan?

June 11th 2020, 4:44pm

GOOD NEWS! You pan looks GREAT!
Very little debris on your magnet is a very good thing! :D

When I changed my filter.. (for some reason I don't recall) I didn't get the old seal out.
But my new filter fit tight in the old seal.
Once you attempt to remove it however, you are committed!

Re: What is this? Why is it in my oil pan?

June 11th 2020, 4:53pm

Mmusicman wrote:GOOD NEWS! You pan looks GREAT!
Very little debris on your magnet is a very good thing! :D

When I changed my filter.. (for some reason I don't recall) I didn't get the old seal out.
But my new filter fit tight in the old seal.
Once you attempt to remove it however, you are committed!


^^^ This. In my opinion, if pulling the old filter down out of the trans is difficult then your O ring seal is nice and tight and there is no need to try and replace it. And when you shove the new filter into the old seal and it's a firm shove it is another indication that things are just fine with the old O ring.

Re: What is this? Why is it in my oil pan?

June 11th 2020, 8:16pm

Excellent news! I definitely plan on giving it a good scrub and weld on a nut on the outside for a drain plug. Coming to the end of this rebuild, hope it all works out :banana: :banana: thanks for the help

Re: What is this? Why is it in my oil pan?

June 12th 2020, 12:21am

I just pump the pan mostly empty by pulling a steel line (to the trans cooler) and have the trans naturally pump the pan empty. Takes about 20 seconds. Steel line unhooks easily... hook to rubber hose and pump into a bucket. Works well.

But adding a drain plug is really the best option.

Re: What is this? Why is it in my oil pan?

June 12th 2020, 12:27am

Just amazing and very very telling nowadays.
Rebuilt engine - did not know of magnets in pans.
Cool, but interesting, nonetheless.

Re: What is this? Why is it in my oil pan?

June 12th 2020, 2:41am

Telling about what?

Re: What is this? Why is it in my oil pan?

June 12th 2020, 12:28pm

Interesting Skillsets, is all.
Like prog'g. a CNC Lathe, w/o Machining Knowledge.

Re: What is this? Why is it in my oil pan?

June 12th 2020, 2:51pm

Nut welded in, time to see if it passes the paper towel test
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Re: What is this? Why is it in my oil pan?

June 12th 2020, 3:16pm

Nice!! Welding is a Skill Set that I can only dream of.
Wishing I had learned at a young age...

And speaking of your nice looking welded plug set up...
- there are Magnetic Plug themselves.
Little magnet sticks up / into the oil.
Easy to see if there is abnormal metal shavings w/o a lab analysis.
They are common in machine tools, power transmission & hyd. systems.
etc, etc.

Re: What is this? Why is it in my oil pan?

June 12th 2020, 4:13pm

Never too late to learn! I took a night class welding at the local community college, it’s loads of fun and just like anything......the more you practice.... The magnetic plug you speak of is exactly what’s going in that there nut, $2 at the AutoZone (aka- hell on earth)

Re: What is this? Why is it in my oil pan?

June 13th 2020, 12:59am

Drain plugs on transmission pans are the bomb. They should come from the factory that way. I add one to every vehicle I drop the pan on - our RV, the Jeep, the '99, the '02, the '05 will get it as soon as I drop that pan...which will be soon.

Your pan looks really good. Very little fuzz, no chunks, fluid doesn't look awful.
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