How To Flush Your Transmission & Differential (STI)

Some people were requesting this and I needed to get it done so why not combine and do the best of both worlds! In todays Episode I will show you how to drain and refill the transmission on an STI, This is applicable to WRXs as well. Overall not too bad just don't cover yourself in Gear Oil like I did.....
T70 TORX Bit amzn.to/39o6Kj9
10mm Allen Socket amzn.to/2OFXHm1
Motul Gear Oil 75W/90 amzn.to/2H4CttK
Fluid Transfer Pump amzn.to/38b6QuB
Drain Pan amzn.to/379wX3M
crush washer part # 803926070
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[@justinturner4850]

Tannner! I’ve had my STI since brand new in 2018. I maintain it meticulously and have a pretty big handful of mods. And I’m the only person who’s ever turned a bolt on it since it was manufactured. And almost 100% of the work done was using your tutorials. Spark plugs, IAG AOS, trans and diff fluid, cyl 4 cooling mod, JDM rear spats, suspension and way more. I’ve said it a hundred times, but thank you for entertaining, teaching, inspiring, motivating, and saving me a ton of money in labor costs. I don’t have many people on maui to teach me Subie things. Hopefully someday I’ll be able to afford an engine build and you’ll be the one I hit up for sure

[@benjaminfoster252]

Love these STI maintenance videos!! Will continue to watch and support!!

[@Origamiman15]

I was literally googling this cause I plan on changing soon. I log onto KZbin and the first video that popped up is yours! Talk about clutch thanks for the awesome video!

[@stinkyD]

Thanks so much for what you do. As a new WRX owner it’s nice to find some reliable maintenance/ modification videos to get some reference as to what’s needed ahead of time .

[@josephploskonka1260]

You always want to make sure you can get the fill plug loose first. Once you have it loose DO NOT PULL THE FILL PLUG OUT. Remove the drain plug(s), then loosen the fill plug to adjust how fast the fluid drains and does not go all over the place.

[@williamwu6712]

Thank you for posting this. I seriously really appreciate your vids and explanations through your videos. You do a great job. Love your content. Keep doing it buddy!

[@rallypack3201]

Thank you for this video!... Planning on doing it when I comeback from overseas. Car has low mileage but it’s just sitting there until I comeback.

[@BlazeOn88]

Great video as always. I'm almost due for a fluid change, so this video is right on time!! Keep up the good work!

[@justinlombard8676]

Best videos on the tube. Keep it up super helpful, informative and entertaining.

[@ARGH28]

i just did this myself for my 2015 sti and just want to point out the washers that are needed. there are no crush washers used. both fill and drain plugs for the rear diff use the washers ending with 050. for the transmission: the fill plug uses the 040 washer and is copper. the the drain plug for the transmission uses the 060 washer. the front diff T70 drain bolt uses the 090 washer. the washers you are referencing in this video ending with 070, is not used. since the washers are not crush washers they are also reusable to a point, so if your vehicle does not have many miles the washers should be in good condition. i also want to mention that the 10mm allen bolts are really weak and i stripped the fill plug, causing me a delay. i also recommend you stick with subaru oil that you can get from the dealership unless you are tracking the car. the motul oil works best when heated and will cause very rough shifts in cold starts for anyone in the winter climates. my car has 33k miles and after the service the car shifts really smooth like it was new. i dont track my car but i do stay in the 3k+ rpm range in 3rd gear for daily street driving and coasting since that is where the car is happier at. the factory oil came out dark and the magnet plugs did their job. i am very pleased at the results and i saved a bunch of money. thanks for your video.

[@Passivelypecora]

Just subscribed great videos man keep up the good work, looking forward to more !

[@rollymignacca4821]

The strong smell that comes from the gear oil are thee extreme pressure additives which is sulfure and protects the gears at extreme tempertures . Thank you sir for the video .

[@joralex]

Awesome work bro. Definitely doing it this weekend!👍🏼👍🏼👍🏼

[@rushodai929]

Thanks for the warning about the gear oil exploding out of the drain hole.

[@robertd57i989]

Im about to have to do this to mine as well as the spark plugs. Thank you so much for making these videos. Very informative and a trip. Good thing you werent doing firearm videos in the Army "never put your finger on the trigger why pointing at the camera BLAM!" Lol

[@DefConGaming22]

Just passed 60,000 miles on mine, need to do mine soon. Good video brother.

[@justinmielsch5924]

Thanks this video was helpful when I did my 2016 wrx

[@blayneazevedo9231]

Great video man! 👍🏽 thanks for the help

[@erics6088]

May have been said already, but you should really have your car level when filling just about any fluid, except coolant. Otherwise, you will likely over/under fill... depending on where the low point is. Still love the channel, and getting the fill plug out first is still the most important thing.

[@subiekeo]

Great video and explanation! I know I description box you listed part number.. how about fill plugs? And are the drain plugs same for part number too or different ? If you could please list them for me thanks