Troubleshooting - logbook Toyota Corolla Runx 2001

Maybe I'll start from the beginning

September 11
10:45 am I went to Domingo (hardware store) to buy the necessary things to continue home repairs. The car behaved as usual! Calm and measured!
14:20 Having finished with household chores, I left the house and got into the car without suspecting anything, having passed a couple of traffic lights, I start moving and I feel that the car began to “stupid”, when starting it kicks and plays with turns. Without attaching special importance to this in the first case, the same thing happens the second time at the next traffic light! And so with every start of movement!
Seriously thought about the cause of the problem!
16:50 I call the guys I know from the service. After explaining to them the whole situation, they advised me to change the oil in the box! Yes, I missed this moment because after buying this car I did not change the oil in the transmission, but half a year has passed and during this time I have traveled around 8-9 thousand km.

14 September

15:30 And so it's been 3 days and the picture is still the same! Having withdrawn money from the card, I went to a friend [a neighbor on the site =))] in AvtoMasla on Kuznetsk, talking about the problems, he offered to completely change the oil in the box! I, too, wanted to do this from the very beginning of the purchase, but all hands did not reach! And here he arrived!
When buying oil, I immediately signed up for a replacement and gave it for work. Everything came out at 2.5 thousand.
4:30 p.m. It's my turn! I stop by, I give the ticket to the master

and 10 liters of Valvoline Max Life T IV gear oil

16:50 And so the process began! Having connected all the "hoses" to the transmission, the old oil began to be pumped out! And what do I see, a rancid "Blackish" slurry of a thick consistency flowed from the hose! The master with a slight expression of surprise (he has seen worse, but what he sees in this one is also not "Good"), say: "Yeah, there's nothing left of the oil, just one word, the oil in the box probably hasn't been changed for years 5! 10 liters may not be enough, you need another 5 liters for the best result!". After this phrase, I went to the store for an "additive" of another +1000 rubles. Having crossed the road in the wrong place with very active traffic and even over the rails =) In short, a fine for me =))) I bought another 5 liters =) And again in the same way =))
Giving the master "supplement" I continued to watch everything that was happening! There is not a big screen on the device that shows what kind of oil is in the box at the moment!
From the very beginning, the screen was black, see for yourself what ran into the canister, though the volume is certainly not the same =)))

But after driving all 14.8 liters of oil [200 ml, still left =)) poured it into a bottle and took it with me =) ] a nice red tint was shown on the screen, such a "view from the canister"

17:40 I'm leaving the garage! Pleased! =) EVERYTHING thought now everything will be fine! But not here it was all the same picture is happening!
18:03 I drove into the yard of my house in frustrated feelings, parked, got out of the car and saw my good friend Ilya coming out of the entrance! Approaching him, I told about my "problems"! Offered a ride and listen! Ilya, sitting behind the wheel, drives out onto the road and gives gas to the cutoff and the car does not go! He immediately understood what was happening (he had this happen) and reassured me that these were not problems with the transmission, he said that it could be problems with some things, the first is the spark plugs, the second is the wire armor and the third is the injector.
I decided to start small, with spark plugs.
19:35 I bought 4 new Denso candles, paid 440 rubles, for one I decided to change and gave 330 rubles for the air filter.

In the parking lot of the store, I immediately set about replacing the filter and spark plugs.

The old filter looks "not very" against the background of the new one

And so I put a new filter, great! Let's continue!

I remove the plastic cover from the engine, pull out the "armor", unscrew the old candles, put in new ones.
Started, sat down, went! And about the MIRACLE! Everything works great! The car is running smoothly again! Even better than before! =)) And I swung at the problems with the box! And all it cost was to change the candles =) Well, okay, but I know that there will be no problems with the box, I hope =)
20:20 I came home satisfied =))) Here is such a story! =))
Yes, here's another thing! I wanted to share one more piece of information! Namely, what kind of oil I fill in the engine, I ask for your attention NESTE OIL full Synthetic oil

Recommended by Neste Oil Rally Finland
I don't know about you, but I was very pleased with the oil!

That's probably all, do not judge strictly =) I apologize for the low quality of the photo, I captured everything on the phone! Thank you for your attention!
PS Your Gennasik =)