4EAT Teardown- Nasty Mess of 20 Year Old Trans Fluid!

[@iptperformancetrans]

IPT Performance Transmissions specializes in Subaru high performance automatics and Subaru built autos, as well a performance rebuild kits, modified valve body and high stall torque converters. www.importperformancetrans.com/ Find us on Social Media Instagram - @IPTperformancetransmission Facebook - Import Performance Transmissions Tik Tok - IPT_Transmission

[@82_KID]

I have a 4EAT.. 2002 Outback. And I do drain and fills regularly and even change the external filter because I generally show my car no mercy.. I am watching this!!!!!!!!

[@caseymoore303]

excellent video. I was trying to understand how subaru AWD worked, specifically ones without a real center diff or viscous coupling. when you pulled the tailshaft off I finally got it. The clutch pack engagement varies, but is never 0. and the split isn't 50/50 due to gearing differences. and the front is driven by that gear engagement in front of the clutch pack.

[@link18953]

I recall when I discovered the early 4eat’s front diff clutch pack solenoid failed into full lock, where as later failed into fully open. Bet that was a messy revision discussion for the engineers. Love you work dude.

[@ronarndt6722]

Thank you for this video I really appreciate it! We do like all the extra work to see the details and the struggles as we can always fast forward 😊

[@vonwesty3544]

Great video! Looking forward to the future reassembly video.

[@iptperformancetrans]

I’m working on it, unfortunately I do it all myself and I’m a way better transmission guy than a content creator or editor ⚙️ I’m trying to make each video a little better than the last and I appreciate every view and every comment.

[@pedlpower]

Me too! This is good stuff! 2010 Forester X, daily driver and beater.

[@toddmackey4374]

I have a 4eat 2wd from a 92 legacy that I just disassembled on my bench. I was having some trouble blowing out the low and reverse piston so I watched your video again. I note in particular what you said about the seals causing problems with delay. This transmission looks good inside, with little wear evident. Except all the seals seemed to have hardened and taken a set with age. I have noted a few differences between my '92 and the '04 you have on the bench. Thanks for a great video though.

[@brandonl1052]

Underrated channel. Thanks for yohr hard work

[@iptperformancetrans]

@@brandonl1052 Thank you and please share if you can ⚙️

[@Owensti]

Thank you for this info. I have a good working 4EAT but the bell housing cracked. I had a spare one laying around and wondered if I could just remove the bolts you did in the beginning and just swap out bell housing. Looks straight forward enough and I will be doing it. Thank you so much for the insightful video and info!

[@iptperformancetrans]

@@Owensti The diff ring gear/carrier lives in the bell housing and you are not going to want to have a ring and pinion that are not a matching set. Furthermore, idk what your particular situation is but 95% of broken Subaru diff cases are a result of the diff failing.

[@malcolmmarzo2461]

When in the car getting the pan off is a devil of a job because the factory RTF silicon seal really glues it on. I found a "seal separator" tool to be the answer. Lysle No.50210 to be the only way to do it in tight spaces. It is an angle blade with a hammer body.

[@iptperformancetrans]

@@malcolmmarzo2461 I’ve always used a paint scraper or something similar They are definitely glued on tight⚙️

[@josebermeo9042]

Wow that was amazing, so many pieces in there. How much does a basic rebuild for a transmission like this usually go for? I have an 02 Forester with what seems to be a bad front differential. 😢

[@egx161]

Wow. Very impressive work. 👍

[@bluegizmo1983]

I just exploded the front diff (I think, haven't pulled the trans yet) in my '04 Forester XT with the 4eat transmission. The car isn't even that heavily modified, just basically a down pipe and catback and a VF39 turbo running 18psi that tapers down to around 13psi at redline. I was boost braking to do a test launch under a little bit of boost, and the boost had only reached about 5 psi when there was a loud bang and then gear oil all over the road. The transmission bellhousing is cracked all the way around almost 360 degrees right where it bolts to the main case of the transmission. I don't know if there was already a crack in the diff gears or something, or what, because from what I've read these 4eat's and the front diffs are pretty strong. Now I'm having a hard time finding a replacement transmission because I guess the 4eat in the '04 FXT was a one year only transmission and not interchangeable with any other year's and not interchangeable with the non-turbo forester either.

[@mikev350z]

Cant wait to see the 5eat next!!

[@iptperformancetrans]

I have a 5EAT teardown video on my channel and I also have the footage to put together the 5EAT rebuild video in the near future. 5EAT - kzbin.info/www/bejne/Zn-sXqd7f6aGobc

[@mikev350z]

@@iptperformancetrans i watches it to many times this week. I am waiting to see it going back togther!!

[@iptperformancetrans]

@@mikev350z I’m not so great with editing so it takes a while but I should be able to have it done in the next couple of weeks

[@ronarndt6722]

Thanks!

[@idcpr]

Hello! Excellent video with lot of details. Very well explained step by step. Do you have transmissions in stock for sale?

[@iptperformancetrans]

@@idcpr Thank you 🙏🏼 I stock some units, but more typically, we build customer’s existing transmissions. My contact is in the description ⚙️

[@shezz540]

Good job love it. I have a Subaru Impreza 2008. when I filling differential oil is mixing up to transmission oil which seal I have to change or change the transmission .

[@llzlk]

Great video explanation! I'm having issues with my legacy 95' and wanted to get into the process! It works fine but after some time, it fails to enter 3rd shift, like the shift won't get in. It happened just a few times, but maybe with your experience could quickly identify any potential problem and where in the transmition is. Just uf you can think of something, I love my subie! Thank you!!

[@iptperformancetrans]

Thank you. It sounds like you may be losing clutch packs.

[@worksonit1]

I appreciate the video! I'm having to replace my front pinion. any chance you could tell me the torque spec for that rear nut for the pinion shaft? ty

[@daveliu-jm6oy]

@iptperformancetrans thanks for your 4EAT videos, I am learning so much - which is mainly that I need to let a pro deal with my transmission at this point.. but I wonder if you can comment or talk about some applications for your upgraded and performance 4EAT? I am faced with a transmission replacement on my unmodified 09 2.5i and some of the prices for an OEM spec rebuilt are around the same as your perforrmance builds. so the question in my mind is, is there any point in going with a higher spec tranny, or will the EJ253 ultimately limit what I can do to utilize the extra spec transmission? thanks

[@iptperformancetrans]

@@daveliu-jm6oy If you can get something better than oem for the same price, I think that the answer is obvious

[@douglasharris1427]

Will you be doing any early 4eat transmissions? I have one here from a 1991 Legacy Turbo - would love to see a tear down and rebuild on the "Phase 1" style.

[@iptperformancetrans]

Unfortunately, I don’t see many of those anymore so probably not. If I do get one I will try to do a video but don’t get your hopes up

[@douglasharris1427]

Understandably so! I thought that at one point in time people preferred the early ones for strength - is there any truth to that? Are they still eligible for builds like you're doing to this one? And any chance you have any videos of an IPT 4eat in action?

[@egx161]

Any TR580s in the future?

[@davidb5952]

Great video! thanks

[@jonnysperanzini3897]

I left a similar comment on the build video but it's probably more relevant here: If i have a popping when putting my car in reverse, would you have any idea what that could be? I've ruled out engine/trans mounts and driveshaft (replaced). Would it be more likely a transmission issue (maybe that piston you said goes bad)? I'm kind of hoping it's the ball joint I know is bad lol

[@iptperformancetrans]

I replied where you first commented but I’m at a disadvantage of trying to diagnose a noise via KZbin comments lol That said, I certainly recommend checking the simple things like ball joints if you think it’s relevant before you go into the trans⚙️

[@briskalliance3219]

Hey man I’m really struggling! I’m swapping one set of guts for another as both cases have different shift position sensors (9pin vs 12pin) My question is regarding the clutch spring clip, mine is much smaller and black and I can’t figure out how to install. Can you give any light on my issue?🙏🏼🙏🏼

[@iptperformancetrans]

@@briskalliance3219 6 o’clock in the case in the 2-4 clutch pack

[@sergios874]

I have my 2009 Subaru forester XT that just made a thud noise and I no longer have reverse. The car drives forward and had a issue with the viscous coupler. Checked fluid and has small metal flakes, do you think it’s better to buy a rebuild kit and fluid and try to fix it or should I try and find a used one?

[@iptperformancetrans]

It’s for me hard to say what you should do but it sounds like your trans is toast. Why not take it out and take it apart and then decide what to do?

[@sergios874]

@@iptperformancetransyeah seems like the next reasonable step I’ll do just that. Thanks for the reply!

[@SnatyMubare]

Thanx for Vidoe especially this One . Ddnt slp trying to google what might be the problem got a Subaru Forester XT Singapore Version its making a whirling noise when yu put into drive and it takes some time like its loading and making some shoshing sound in first gear but shifts like new on some gears with no issues. Sometimes it cuts off once it engages into drive or reverse. What might be the problem um down here in Africa with very few spares .when I scan it its showing incorrect gear ratio 1 up to 4. Kindly asking for your help.

[@JayGeeJay]

Great video! Can these be built-up to pull a small trailer?

[@iptperformancetrans]

I don’t know what a small trailer constitutes, but yes. they can be made to be more suitable for towing

[@JayGeeJay]

@@iptperformancetrans hey small pop up camper trailer. To haul my golf cart. I would say nothing less than 1500 pounds.

[@rodrigoeyer]

Hello, I'm in Brazil and I really needed your help, I saw that you know this exchange rate very well and you have a serious problem with mine. The ATF fluid has entered the differential and mixed with thick differential oil. The gearbox has been dismantled a few times but it's never resolved, it's not about that seal in the tube between the differential and the gearbox, where else could this fluid be passing through, we're lost, I really need your help. Thank very much

[@iptperformancetrans]

There’s several places from which the can leak. If you want to email me I’ll try to go over everything with you [e-mail]

[@rodrigoeyer]

​@@iptperformancetransHello, I sent you the email that day. thanks

[@klord-is9ft]

Video on how to set backlash on these 4eat?

[@iptperformancetrans]

Maybe one day but for now, it’s done like anything else but nut and bolt the pump portion with the pinion in it to the diff case and do the gear set up like that. The carrier bearing housings are adjusters that are threaded, similar to how one would adjust a 9” Ford rear.

[@jonathondaly1460]

is the auto pinion the same as a manual one?

[@CRXSLY]

2010 Subaru forester and center coupler starting to make noise when i do slow turn...i do the FWD fuse test and the noise is gone so do you think changing oil and filter will help or is a waisting time and money?

[@iptperformancetrans]

Changing fluid is maintenance and not a repair I have no idea why people think that changing fluid is going to fix anything Would changing engine oil fix a broken engine?

[@CRXSLY]

@@iptperformancetrans thx for your response loud and clear! :)...now time to find a new transmisson :)

[@jonathondaly1460]

my wrx 4eat seems to hang on too long in first sometimes and. bang into second, all other shifts are perfect, it. has a code for vehicle speed sensor, could this cause the. issue?

[@jonnysperanzini3897]

I'm not necessarily an expert on transmissions or anything, but probably. As far as I'm aware the speed sensors collect data for the tcu to know when to tell the transmission to shift, and with at least one known to be bad (the light), I would say replace the sensor and see if it fixes it. If it doesn't, its probably a clutch pack or valve body issue, I'd think.

[@patonbike]

Former Hawthorner (hawthornite?) here! Just for my curiosity how much power can built 4eat or 5eat handle at the wheels or at the engine. I've always thought that a built 5eat could be faster than 6mt.

[@iptperformancetrans]

Small world.. 4EAT's are usually good for up to 500hp and we have done 5EAT's up to about 600hp