Why Automatic Transmissions Fail
ฝัง
- เผยแพร่เมื่อ 22 พ.ค. 2024
- Here's a look inside a failed automatic transmission and what caused it to fail.
This Infiniti G35 AWD transmission was slipping in 4th and 5th gear. In this video, the engine and transmission is removed and the transmission completely disassembled to examine the clutches, band and drum, one way clutch, valve body, solenoid and computer, filter, pan and torque converter.
For a full explanation on how this automatic transmission works, please see this video:
• How an Automatic Trans...
Skip to section in the video:
0:00 Teardown
3:35 Analysis
4:24 Clutches
8:38 Band and Drum
8:54 One way Clutch
9:22 Valve Body, Computer and Solenoids
11:45 Filter and Pan
12:43 Torque Converter
Make sure you change your transmission fluid and filter to extend its life. You can purchase supplies for that here:
Transmission Fluid:
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amzn.to/3fGYnSF (Canada)
Transmission Filter Kit:
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amzn.to/2PEZg3B (Canada)
Fluid transfer pump:
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Fluid Funnel:
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Socket set:
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Reference videos:
How a FWD Transmission Works:
• How an Automatic Trans...
How a Torque Converter Works:
• How a Torque Converter...
How to Change Transmission Fluid and Filter (with dipstick):
• Transmission Filter & ...
How to Change Transmission Fluid (without dipstick):
• Toyota / Lexus Sealed ...
How a Differential Works:
• How a Differential Works
How a CV Axle Works:
• How a CV Axle Works
This is the Camera I use:
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I can see why it cost so much to fix automatic transmissions. And it requires your brothers complete wardrobe to clean up the mess! 😄
Yes it's quite expensive. Most might just swap in a rebuilt
lmao
Hmm hmm
And that was a 5-speed automatic... imagine now an eight-plus speed.
cheaper to swap than rebuilding it.
This is why I prefer manual transmissions. I’ve fully rebuilt two of my own but I would never dare to open up an automatic. You definitely have a lot of knowledge. Mad props sir.
Some manuals are complexe.. but in general it's quite simple. It also depends on what you call "rebuild"
If you change the berings only that's the easier way to fix, sometimes there's more 😉
I prefer manual transmission too.
Automatics require a knowledge of upgrades to failure points or high wear areas that can be improved - plus knowing the proper spacing of part & testing of oil passages - replacing parts means a short life of 30 to 50K miles - remanufactured is 120 to 200k miles
Automatics actually add power.
He forgot to say, "My brother's toothbrush"😂
Oral B is my wife's toothbrush. My brother uses Colgate
@@speedkar99 lol
Ohh he replied 😂 still LOL
@@speedkar99 I love your videos man very educational stuff.
He puts it back after he's done with it.
I'm 3 minutes into the video and already feeling anxious cause of all the parts! It was funny when you said "now I'm gonna remove all 12,500 and something bolts". You're very knowledgeable! Congrats!
There was a ton of bolts !
@@speedkar99 my 12 Nissan Altima's 2.5 transmission starts to make a humming sound when I drive it for a couple of hours, I live in Imperial ca and the other day I had to go to San Diego thru the 8 fwy, the elevation starts at 1000 feet and ends around 4180 to its highest peak, I have to pull out to let the tranny cool at least for 10-15 minutes then away i go but this time i have to drive it looking at my RPM's do not exceed 2200 rpm's (65 mph) it really sucks! Any thoughts on why?
Sorry for the long text!
@@310_Latchkey_kid You literally just said why. You kick the shit out of it daily at low RPMs on long, hard ascents. Drop a gear and rev higher. You're welcome.
P.S. As with Google Maps, lowest and highest points don't mean as much as "total ascent" (all the miles going up) and "total descent" (... and down).
HE TALKING ABOUT ALL THE BOLTS TO REMOVE TRANS from the car TO ? HE NOT A WIZ Kid ? BY FAR ?e if been around them 10 or more yrs ? i seen guys take them apart ? can't put them back ? OK ! MOST TRANS MIGHT HAVE THESE DAYS 2020 800 PARTS ! PLUS IF YOU WANT TO COUNT V BODY ? THAT'S A DIFF STORY ? WHO KNOWS ON THEM HOW MANY PARTS ! I BET HE DON'T EVEN KNOW ? I BEEN RE BUILDER 30 YRS TO every V BODY so DIFF ?
First time I've ever seen a transmission diagram. I love the quality of these videos.
Thanks. Check the linked video for the full teardown and explaination and more diagram
I like your advanced pointing device 😂
The teach-brush
@@speedkar99 🤣
That’s his brothers toothbrush 🤣🤣🤣🤣🤣🤣🤣🤣
@@speedkar99 Hilarious!!!
@@carlosg1165 LOL LOL LOL!!!!!
I love how you started it without the exhaust. Lol
I wanted to hear that raw exhaust out of the cats
@@speedkar99 Good of you boss...
that was a top tier edit lmao
I can see why rebuilt transmissions never work very long, they are pretty much unfixable.
Yeah there's alot to go wrong there
Its true, finding someone who knows what they're doing is almost impossible
And toothbrushes
@@wjanis1 Not enuf brothers' old shirts to get the job done correctly.
yeah, most of the engine rebuild manuals starts with "clean place". A lot of shops are opposite of that.
After seeing this I’m surprised they work at all.
Haha
I'm amazed by how compacted it is
Mad respect, I'm from Costa Rica, had to fix myself and learn from zero in order to fix my 2016 Mustangs 6r80. It was fun but took a long time.
I lost reverse, 4th and 5th for abusing the Transbrake feature at the drag strip.
I'm happy I studied the manuals and was able to change the clutches and now it drives again like a charm.
Loved seeing this since it reminds me all that experience
If i had the time id love to learn how to rebuild them , and carburetors
@@ThreeDaysOfDan Why on earth would you want to learn to rebuild a Carburetor? Cars haven't had Carburetors really silce 1989 when Fuel injectors were introduced and direct injection engines were designed... Unless your working on like a classic collectible car idk why you would want to learn how to rebuild one
@@gincoopland6545 because I own 4 cars with carbs..
Just wanted to come by and say thank you for the incredibly detailed, short, to-the-point, informative videos. After watching your upper control arm video I immediately subbed, but something like this is next level in terms of complexity. Awesome, amazing work you're putting into these generalized videos, thank you!
Glad you subscribed and Happy that you enjoy my work
Excellent overview, succinct, no rambling like most videos.
Easily one of the most complex pieces of machinery ever created
Wow! It’s a small wonder modern automatic transmissions work at all so incredibly complex, great video great information
So many things to learn about cars, would gladly work as an assistant for free.
Me too
another cool breakdown. love your editing style. not a bunch of waiting and wasted time. rapid fire. excellent job.
I live listening to this guy talking about shit I don’t understand before going to sleep. Great voice, great cadence, a little bit of accent. Makes me feel at home.
Now i understand why i'm so bad at mechanics ,I was just missing my brother's entire wardrobe.
It's critical
That is good stuff very funny LOL
So basically everything in an automatic transmission is a failure point?
@@thealienrobotanthropologist excellent points!
Abusing clutches is a guarantee for premature failure.
Recently I got to experiment with the synthetic "Valvoline MaxLife ATF": its a far BETTER fluid than Honda DW1 mainly it has stable viscosity!
It gives consistent shift points and managed pressure for lower clutch wear 😉.
To be friend with your transmission: replace ATF early (20kMi without converter drain or 40k with converter) -
Buying a "dipstick evacuator" will pay for itself the 1st time.
👍
Yep. Except the user
@@speedkar99 well I mean, in many cases the user could also be considered a failure point 🤷
@@thealienrobotanthropologist thanks for the explanation.
I don't know much about automatics but he did say at 9:22 that the valve body is a big failure point 🤷
I hear alot of "don't do anything to the transmission or it will fail."99 Yukon 253,000 miles.Fluid is reddish brown translucent.I believe if I don't maintain it the filter could clog up and starvation will kill it.Many people don't think of the transmission until it slips try to save it then blame the flush or drain and fill.Not a transmission expert but heat and dirty fluid 🤞
A thorough and detailed explanation of the workings of an automatic transmission. You definitely know your way around them. Thank you for sharing!
Glad you enjoyed it. I've taken these apart before, see my teardown video linked in the video
Transmission's are no joke, I don't think I could ever work on one. Hat's off to the guys that design and repair transmissions.
Indeed. Quite complex
Removing that transmission was a snap! Wonderful Nissan design.
they make it easy to own and then dispose 🙄
Step one remove engine
@@speedkar99 Funny, but it's the same on my 2005 Scion XB. Toyota is just as brilliant as Nissan, it turns out.
I almost thought it was a Ford.
@@Greenbearls You make great ham. I buy it sometimes.
My shift solenoid is attached to my shoulder.
Manaul transmission
Ha!
Manual is always the best
I hate auto tranies. Manual with no synchros.
@@Greenbearls if you can't find it, grind it.
I'm so glad I found your channel. Your knowledge is inspiring.
Man, you do the absolute best tear-downs!
You are a great shop teacher! I like the tooth brush as a pointer. Thanks for sharing these great tips.
Thanks for a great video! Informative, to the point, and great illustration of how the automatic works.
Thanks, glad you appreciate the video
I have a cvt transmission and I love it! Some people say they hate cvt but I think it depends on the user or driver on how they drive
This is the video that finally made me understand how clutch packs work, thank you for that 😃
You are a natural instructor because you truly understand what’s going on. Well done.
Thanks I'm glad you appreciate my teaching style
@@speedkar99 I do, but I'm not so sure about your brother
You are a genius sir, thanks for these greats explainations. Greetings from Quebec, Canada.
Greetings from Toronto Canada
@@speedkar99 I'm doing research as I'm looking at eventually pulling and rebuilding the Aisin TF-80SC in my '07 XC90 V8. I've seen probably a hundred videos over the years pertaining to automatic transmissions, and this video helped convey more understanding about the inner workings than all the rest combined. So thank you. Cheers from a fellow Torontonian :)
Much respect and admiration for your technical skills.
Dude your the best automotive channel on TH-cam; knowledgeable and you actually show us stuff!
Thanks and that's what sets me apart.. I'd rather tear apart something real to learn myself and show you guys than draw, animate or just talk about it.
Excellent tutorial, i especially like how you use the diagram to diagnose the issues. Automatic transmissions has always been such a mystery to until now - thank you!
Glad it helped you understand!
Thank you for sharing all this knowledge.
Excellent and thorough explanations. I learned more about transmissions in just under 14 minutes than i ever knew in any amount of years. With bonus tips on how to annoy my brother. invaluable!
“Next I’m going to remove 12,552 10mm bolts”😂😂
Imagine if he edit that part with earrape😂
Most excellent!
the quality of your videos is fantastic, not a second of wasted time. Just directly to the point & explained so well for even the non-mechanically minded! much love from Australia!
Thanks I'm glad you appreciate my video style
Love your videos man.. Learning a lot.. Keep it up!!
Glad you enjoyed it
You RE the One of the best auto repair channel show up every detail job thank you keepng more detail videos please cause we RE learn a lot of things from this channel
Love your videos man, keep up the work speedkar!
I’m amazed that automatic transmissions can even work in the first place. The fact that people can drive a cad for 100k plus miles with a transmission doing all this work without the driver ever really even thinking about it.
Why? It’s actually more simple than a manual in many ways.
No gears to mesh. No synchros or dog clutches. No shift linkages, no throwout bearings.
Just clutches and bands that are activated in a certain sequence to hold sun, planet carriers, or ring gears still to make the gears you need.
In the old days it was super simple. Three forward gears plus reverse just needed two planetary gears like a Simpson gear set.
The valve body looks more complex than it is.
And all of those smooth shifts also cushioned by a torque converter means a lot less shock loads than a manual.
Change the fluid and filter, nothing is “lifetime” fluid.
"lifetime ATF" was a sweet scam.
Now they use super low viscosity ATF MB-236.15 low lubricity too 🙄
@@glasser2819 life time means less then 50,000miles!!
Clearly you must be old school. My oil is lifetime. XD
Agreed
In a manual its lifetime...
Great explanation and easy to follow, thank you.
Ur channel and Chrisfix are my favorites automobile channels!!
I will just buy a manual transmission 😳😳😳
If you live in the US it’s a built in theft deterrent 😂 cuz no one can drive one 😂
Pretty hard to text and drive in one as well.
There are manual shift people and there and the rest of us. You really do learn early on which one you are. Always buy the correct transmission for your brain.
Text this again when your sitting in stop and go traffic.
@@TehKaiser
Maybe for kids nowadays, back in 2001 I used to text on my Nokia, smoke a cig, drink a beer and drive my manual GSX Eclipse 😆
I MADE A MISTAKE BUYING A CVT
WE GOTTA GO BACK, MARTY
CVT is the best in terms of efficiency but the worst in durability, if it's a good maintained CVT it can last you 200,000KM
@@ThexXxXxOLOxXxXx 200.000 is not much.
@@dieselgeezer18 im just trying to make him feel a little better he can sell it at 150k before cvt problems 😂
@@ThexXxXxOLOxXxXx hahahah😂
My prius had a cvt transmission no trouble for about 100,000 miles.I babied it for mileage.Now they built a cvt transmission with a 1st gear to reduce the stress from getting it started moving.
Amazing work, i know this tear down took many hours.Thank for sharing
Wow, excellent job! Thank you for sharing so much knowledge!
Mechanick's brother: "hav u seen my tshirt, sweat pants and my toothbrush?" Lol
Ahhhh, now I see why it's called INFINITY!
And beyond
Very well done! I loved the toothbrush, not to mention your "brothers old t-shirts" hehe, but the coolest was simply the speed and knowledge that just kept banging on! :D A great video, I had to see the whole thing even though I'll leave this job to the professionals.
Thank you for the video! My '91 GMC with 300k miles has the same slipping problem in 3rd and 4th. The transmission was rebuilt a few years ago by the previous owner and its already failed. He's trying to convince me to rebuild it, but after this video I think I'll leave it as someone else's problem. :)
Thankfully my daily driver is a manual. Currently at 275k miles with no drivetrain problems at all.
A lot of clutches that can wear down overtime on automatics. Luckily a manual only needs one
True but that one clutch does alot of work
In a manual transmission, the gearbox can break.
@@vintagetriplex3728 synchros are often the first to go
@@speedkar99 In a daily driver car that's not taking a shitkicking from the driver, the clutch should outlast the car. I literally revived a "shot" clutch by driving it; pretty sure it was glazed due to the previous owner slipping too much at every start, probably with the radio drowning out the (quiet) engine...
@@fun_ghoul What? Pretty much all cars need a clutch replacement at 150,000 kms, give or take 30k
I wasn't surprised, it's a Nissan. So didn't expect it to last long looong time.
I was expecting you to fix and put everything together and drive the vehicle again.
No thanks. I was going to swap but quickly gave up
Google Man regular.
@@speedkar99 so you just dump the vehicle or sent it to transmission rebuild specialist? Or you replace the whole transmission with refurbished one?
@Google Man no such thing as a regular transmission.
You're an idiot. This car is very reliable. There's a reason you see them for sale with 250k and they're abused.
I’m gonna clean up this here fluid “with my brothers old garments and undergarments.”
Your too funny Señor. I’ve been watching you for years.
This makes me feel comfortable driving a manual
Eventually you have to change your clutch.
Autos are for sissies
@@felixcat4346 MT is waaay cheaper to maintain, and work flawlessly for a very long time
@@gorgeusjames I like sometimes to drive auto, and get that it fits better for some. Personally I like manual for the feeling of being in more total control.
Awesome. Not everyone has that opportunity or luxury to drive what they want
You must be grateful to your brother for the peripherals! 😆 What’s the best automatic transmission you came across given proper maintenance ?
I'm an old timer and the best transmission I have experience with is the General Motors Turbo Hydramatic 400. Rugged and dependable but since there are only three speeds they quit making them decades ago
nasedo3129 shame when GM has something good it seems to stopped being produced.
Toyota transmissions are usually the best. Aisin is the best auto transmission manufacturer.
first video i watched from this channel. subscribed.
Now that's a mess!!! I admire you for working on such a thing dude
Big mess....stain on driveway
Thats why all manufacturers STOPPED manual transmission , they want to bleed your wallet
European manufacturers still offer most of their cars with manual transmissions.
dirk bomans that doesn’t be exported to other countries , you can wait few years and they will DISAPPEAR
@@Wan72_ Or, you can relocate to a more civilised part of the world ;-)
dirk bomans autos are only for people with physical disabilities in Ireland, mainly normal (manual) transmission
Not really. Since most people don't keep thier car past warranty they cater to those people
I just watched you remove and tear down a transmission without using every swear word the internet can come up with..... Clearly not human.
I don't swear. I probably would if I had to rebuild it
Earned a new subscriber . You’re killin it man
I changed the fluid in my truck's transmission last weekend. I can SMELL this video.
Nice, yep I sure smelled like transmission fluid when I was done taking this apart
Same haha. It sticks with you for life
Thanks for your brother for sponsoring your videos with his cloth, underwear, and toothbrush.
Yep. Wife's toothbrush this time btw. Oral B
Is that your brothers toothbrush as well 😂
Oral B is my wife's
Thank you for doing all this work! Learned a lot!
Good and fast with much detail. I had flaring shifts in my 1996 Plymouth Voyager 2.4L with A-413 Torque-flite transmission, which is like the 1960's Chrysler 3-spd transmissions, but FWD version, which is much more pain to remove. I found several clutch plates worn down to bare metal. Interestingly, it had an extra steel plate in one clutch pack, suggesting the rebuilder (Certified Transmission label) had re-used worn clutch plates, filling the space with an extra steel. Chintzy approach since a clutch plate costs $2, but let them meet their 10K mile warranty. A rebuild kit only cost $100 and I bought the better dark "racing" clutch plates (graphite paper, HEM?). Your clutch plates will last much longer if you let up on the gas pedal when the transmission is ready to shift. I think that newer cars (since ~2010) do that automatically since the computer controls a motorized throttle and your gas pedal is just a "driver request". I disagree with "old Chryslers eating transmissions". I recently rebuilt the A-604 4 speed in our 2002 T&C 3.8L at 270K miles because I had a leak at the front which I though was from the front pump seal. It was pristine inside with the clutch plates worn 500K miles now. Chrysler transmissions in V-6 minivans which had problems were mostly due to shops refilling them with cheaper Dexron fluid (for GM), rather than the proper ATF+4, which causes shudder in the lock-up torque converter. Don't let monkeys touch them and they last.
man I love u do u know that
Glad you like my video
this just made me paranoid over my auto transmission.
same, gonna go check my fluid levels lol.
That's why you buy a popular car so that when your transmission goes you can find another from a nearby scrapyard.
Excellent video amigo. Keep up the good work
I wish i had someone this knowledgeable in my area 🙌🏻🙌🏻 i would totally give my car for service here.
你拿的不是牙刷，是定海神针啊！
Translated: “You are not holding a toothbrush, but a Dinghai Shenzhen!”
2nd lol
First time I'm early for any of ur vids
Nice thanks
More videos like this. Please. 🙏thanks for this video. I like watching videos about transmissions.
Glad you enjoyed it.
Perhaps a dual clutch teardown video?
Thank you very much for the detailed explanation. I enjoyed the video so much.
You are welcome
holly sheeeaat, why AT don't all fail
Yes
WOW ! The comprehensive knowledge that you share is great! Thank you. Now I know i didn't waste my money when i did the drain and fill a little early.
You are welcome
Outstanding video as always
Respect, complex . informative. u explained soo well .
one thing i decided after seeing this vdo
iam never ever gonna buy an automatic
will be happy with a manual box. with a good torqy engine.
I like everything about this video, from the derailed, easy to understand explanations, to the use of your brother's old clothes as rags, to the toothbrush pointer. Great job!
Haha
Gotta use what I have
I don't know how you guys do it. Very impressive.
Thanks. New video dropping tomorrow on this same topic
My 96 G20 fwd went over 200,000 miles with no issues. Just changed the atf every few years, and never abused it.
Those were reliable
My AT 350z had this issue. Slipping on 3rd and 4th gear. now this explain everthing. thanks
What did you end up swapping in?
@@speedkar99 still using it now. Lol
Excellent videos. You really know your stuff!
This video is excellent for general knowledge insights to component relationships.
Yes and also to see a failure. Very interesting
@@speedkar99 Yeah, that's the truth. Haha!
Well done! Especially with the sang-wich
He uses a toothbrush like a teacher in school uses a long stick to point at a black board lol. but this is by far the best video I ever seen on TH-cam about car maintenance in years!
Another HUGE thing I see a ton of ppl do is not coming to a complete stop before the shift from reverse to drive..it drives me nutz bc it only takes an extra second to avoid unnecessary damage 😕
Thank you Sir for these videos! You are a god send! 🙏
I've been driving for more than 20 years. This video makes me want to learn to drive manual transmissions from now on.
Old reliable stuff is outdated. .. everyone wants new stuff so the automakers bend reliability in favour of more sales
Hi Man ! I really like your videos!! You must be Professional. Master tech!! I’m still New learning transmissions!
Great job of explaining how a auto trans works and what's wrong when it doesn't.
Thanks
Very Useful Video Thanks.
wow.. man i wished i was in the garage with you.. so much to learn.. Thanks a mill
These are pretty robust units if maintained. It’s likely this transmission was run low on fluid causing low pressure due to a external leak. The fwd brake in the rear of the case rarely burn up on these RE5R05A units without low fluid concerns. The input clutch (4th gear) has a low torque capacity and usually is the first clutch to fail.
Great teardown and explanation of the unit.
Oh my! Took me months!!! but here it is such a great video!!! I’m subbing notifications on and got a new Channel to binge on hell yeah!
This was the guy that paid attention in school. Cool vids!
Well maintained automatic transmissions on 1990’s Ford Falcon taxis in Australia routinely did 500,000 kilometres.
Outstanding insight Always
How do you remember how everything goes back together? Wow great job!
Play the video in reverse