A340 Teardown, No Reverse

[@kevinikola8003]

Great transmissions. I have a similar one in my LS400 and it has more than 350k miles on it. Just keep oil changed. Thank you Gary, great video.

[@dredlokSB]

A very good film, it helped me understand my problem with my A340E, I had the same symptoms, D is driving normally, N is moving forward, R cannot be used because the car "fights" wanting to go forward-backward. Huge knowledge and efficiency in mechanics, which can be seen in the video. Regards!

[@GaryFerraro]

Thank you, you have a clutch pack locked together

[@CanizaM]

Interesting how similar transmissions are from different manufacturers. Overdrive section looks like that of a 4L80, while the 3-speed gearsets and clutches is similar to a THM350.

[@oldschool9746]

As always,great content. Thank you Gary.

[@tomknud]

Neat demo of a breakdown, thanks!

[@paulnielsen8528]

My Volvo 960 had rare trouble slipping on brutal cold days the past 2 winters. In February it really started to slip. Badly, forward and back. I took it to 2 local shops and they prescribed like $2,000 remanufacturer but they couldn't get the parts (we're in Canada). I declined. Changed the fluid and got 3 more weeks out of it and then it stopped completely. 400,000 km. I have a $600 used unit coming this week and will have that popped in. Then I'll disassemble my old one to see what happened. If luck, it's basically a rebuild kit. Wish me luck.

[@GaryFerraro]

Good luck, what year is your car? it would run ok hot?

[@paulnielsen8528]

@@GaryFerraro It's a 97. The past 2 winters it would slip immediately on startup on a brutally cold day. This year Feb it got a lot worse and then became undrivable. Weirdly, if I stopped the engine and re-started, it improved and I could continue without slipping but then it would start to slip again. Plus a groaning sound. I honestly don't know what the problem was. Very few places will do a real diagnosis. I'll swap in the used transmission (I need the car for a small business) and then disassemble the transmission to see what might be obvious. I'll let you know what I find.

[@ronaldrussell5481]

Thank you, just as you thought!

[@pbmartinfencing]

Gary I’ve got a 2002 tundra 2wd 4.7 auto .309k miles I’ve noticed the transmission has a slight whine in first gear only , soon as it shifts it goes away . It’s not very loud , the transmission shifts perfect , no shudder nothing just the little whine . The fluid is clean because i change it every 15k miles due to pullig a trailer daily . Is that whine a normal thing , I can say I don’t remember hearing it before but normally when driving I have the ac blowing and radio up .

[@paulyoung7664]

Awesome video! Thanks!

[@jamesspargo]

Great video; thank you!

[@connerchampion5656]

This A340 series was made from 1985 and current and they are famous for their reliability and being nearly trouble free from the start. The Jeep XJ’s and MJ’s called it the AW4.

[@connerchampion5656]

These Toyota Aisin A340’s can last like 300k or more if we’ll taken care of. These Toyota Aisin A340’s are very nice modern classic units.

[@connerchampion5656]

These Toyota A340’s weren’t just in Toyota’s and like I said they were in 1987-2001 Jeep XJ’s called the AW4, some Mitsubishi’s, and a Volvo 960 had it.

[@GaryFerraro]

@@connerchampion5656 The TPS Had a lot of problems causing the trans not to shift

[@KSA-wo7dh]

Great video! I,ve got one in Guyana, SA, that seemed to work perfectly. Then noticed a slight loss of power on a steep hill, but it worked as normal and figured it was the few extra folks I was giving a ride to? Then I came home to Florida for a few months. Returned to GY and went to move it and it hesitated for a few seconds, then drove normal. Got to the steep hill and didn't want to climb. Made it up, then drove home like normal. Next day, no more moving in any direction. I'm out in the jungle with the nearest "transmission mechanic" an hour airplane ride away. I built a ramp and elevated platform to start wrenching, but decided to tackle it on my next trip after coming home and watching KZbin... Here I am:) Any ideas??

[@bashar86]

Hi I have the A44D transmission for a 2002 2.4L tacoma It does not want to shift into 3rd and 4th unless the transmission fluid is hot and half the time I have no reverse. Sometimes i have reverse when the transmission shift into 3rd and 4th. If I dont get the transmission to shift into 3rd and 4th I have no reverse Its automatic by the way

[@6806goats1]

Gary, is the A340 similar enough to the A343F to use videos for that transmission to help me rebuild my 97 LandCruiser trans? More videos for the A340. Was thinking about installing an LS 6.0 engine and 6L90 into my 97 but rebuild videos for the 6L90 show me that it’s not as reliable a transmission as I had originally thought. At 66, I’m kinda old to return to auto classes even if I enjoy the heck out of them. Took auto mechanics and auto body but I’ve been working in the Middle East for the past 15 years. Still want to learn and build my own in retirement, videos seem to be the most logical approach. Thanks.

[@kren1101]

I have a 1999 4runner with a 2.7L, 2wd version showing the same symptoms (no reverse, forward in neutral). I just haven't noticed it try to fight backward and forward like you mentioned on this one. Admittedly, it did get low on fluid, so I'm thinking this is just the problem with mine.

[@GaryFerraro]

very possible, sounds like a clutch pack is stuck together

[@TimmyTheToolman]

Thanks for the video Gary. I learned a ton. Too bad you didn't have somebody helping you film so we could have gotten some better angles to see better exactly what you were doing in the case. I'm surprised you don't use a headlamp for lighting while you work. This way you don't have to hold the small flashlight in your mouth to see what you're doing. I wonder if you have a video for the build-up for this trans. I hope so. I'm going to search your channel now. Thanks again!

[@GaryFerraro]

Hi Tim, I do not have a rebuild video on this trans, sorry

[@TimmyTheToolman]

@@GaryFerraro Yeah, I saw that. Anyway, thanks for the teardown video. It was very informative.

[@scottpollard3270]

Good one Gary, thanks.

[@GaryFerraro]

Thank you

[@dorgevalgarrido9437]

Good night Gary... I am Garrido from Brazil. Could you give a tip?... Hilux 2013 has not reverse... D and N are normal... The mechanic said has no electronic codes in the scanner... Do you think the problem is the clutch pack ... or some piston ...or seal?... what spefecificly? Thank for help. God blees you always.

[@GaryFerraro]

sounds like maybe the low/reverse clutch pack

[@thedd13ram]

I have a 89 Toyota Truck 3.0 V6 2wd automatic with column shifter. I believe its the A340E. I had the same exact issue with a line breaking and it drove forward in N and had no reverse. Then I got to playing with the shifter and it swapped around, now it has reverse but no forward. The shift linkage on the driver's side of transmission feels normal, moved it while under truck, it goes into each position normal. D light doesn't light up (never has, bulb burnt out) 2 light is dim, and L light is dim. Any ideas?

[@ericg7237]

Great detailed video! I have a 97 ToyotaT100 4wd with the A340f transmission. I need to remove the extension housing because speed sensor broke off during removal and fell into housing. It looks like extension housing is sealed with red rtv from factory, is this preferred method for reinstallation? Thanks in advance!

[@GaryFerraro]

Yes, If silicone came off then there is no gasket

[@rpgtoyaface]

Mine got rebuilt and is doing this exact thing. Loses reverse when its up to temp but not cold. Neutral goes forward when warm. You make it look doable for me to tear down and look. But maybe an opinion from you would help too.

[@GaryFerraro]

certainly sounds like something is locked, did the trans run low on fluid?

[@rpgtoyaface]

@@GaryFerraro Its been like that since day 1 of it being installed. Fluids been topped off and checked and even put a big cooler to keep the transmission at good temp. Im at a loss. Its basically brand new. No codes either it just gets warm and bam its gone.

[@jaxj8560]

After taking out the last clutch, do the thick bevel go up or down when it goes back in the case?

[@SamuelRSands]

Can you some how break free the welded clutches wile trans is still in stalled?

[@GaryFerraro]

that may or may not be able to do that. If maybe only one clutch is stuck it may, if the pack is stuck then will not

[@tptrsn]

Thanks for this! Is the a340 trans the same as the Aisin AW-4 in Jeep XJx, WJs, etc?

[@GaryFerraro]

yes

[@tptrsn]

@@GaryFerraro Thank you sir!

[@connerchampion5656]

It wasn’t in WJ’s

[@tptrsn]

@@connerchampion5656 I'm guessing you probably know what was in them then? I had an early WJ, and I guess I can't remember what trans was in it. Maybe I never knew. Lol

[@connerchampion5656]

@@tptrsn On wikipedia for the Jeep WJ If it was the 4.0L I6 engine it was the 42RE, if it was the 1999 & 2000 4.7L V8's it was the 45RFE, the later 2001-2004 4.7L V8's had the 545RFE. What year model was your WJ? Was your WJ a straight 6 or a V8 engine?

[@BTR2018]

Hello Gary, on my 2014 Toyota sienna V6 3.5 recently started getting a code P0990 this is on a u660e transmission already replaced the TCM and the wiring harness inside the transmission and still nothing basically sometimes I will lose reverse after the transmission gets warm and a hard bump from second gear to first gear when I’m like downshifting or coming to a stop. Could you direct me in the right place or where to look or what would be your suggestions on the problem? Also is there anyway to contact you or where are you located? Thanks Also I had the transmission fluid changed and flushed out. Getting ready to park the van in the garage and take off the transmission and start checking it out on the inside what would be some stuff that I need to check out? Thanks

[@GaryFerraro]

ok, going to look up this code but question, Is this ok cold and not ok hot?

[@BTR2018]

@@GaryFerraro Yes when it’s cold it’s fairly good but when it warms up it starts to act up especially when im in stop and go traffic.

[@GaryFerraro]

@@BTR2018 kinda seems like a valvebody problem

[@BTR2018]

@@GaryFerraro What would you suggest me doing?

[@GaryFerraro]

@@BTR2018 If it works ok cold and not ok hot, i would try a valvebody, and reset adapts again

[@RVG30]

Hello Gary. Thanks for another great video. I recently bought a 2009 BMW 750li with zf6hp transmission. The car wasn't moving forward or backward, even if the shifter goes in D and R and it stays there. We aren't able to push the car if it had the engine on even it was in N. We take off the oil pan and the fluid was really black with burnt smell and low. We changed the sleeves, 7 liters of fluid and the pan. Now the car is acting weird, it goes in drives and move forward, changes the gears but it gives kicks. In neutral its going forward, and reverse goes forward 1 foot and stops aggressive. It also has a metallic noise sometimes. What's your opinion? I regret I didn't change the solenoids too. Thank you

[@GaryFerraro]

Almost sounds like a clutch pack is locked together

[@RVG30]

@@GaryFerraro should I try to change the solenoids too? Does it worth to get it fixed or replacing the whole transmission be a better idea?

[@pradolover]

Hi Gary, great video, have you got any tips for getting a reliable dipstick reading on these transmissions? I have an A343F in my Toyota Prado (similar to 4runner) and it's almost impossible to get a reliable repeatable reading. I'm doing it with the trans warm, in N with motor running. Makes it so easy to trick yourself into overfilling.

[@GaryFerraro]

does it show high on one side and low on the other side?

[@pradolover]

@@GaryFerraro It's fairly random and unrepeatable to be honest, but yes both sides of the dipstick are usually different making you wonder which is correct.

[@upload2352]

I have this trans in a volvo 960 (144k miles). Getting codes for "no torque converter lockup" and "trans fluid temp sensor." I assume the sensor's bad and that's preventing the lockup due to no signal to ECM. I'd replace the sensor, but can't find one - anywhere. Any guidance? Trans otherwise works fine, but I'm keeping it off the highway until/unless I can get the torque converter to lock up again.

[@GaryFerraro]

If the converter is slipping, it generates a lot of heat, very possible the Temp code came on because converter is slipping, this you may not feel

[@upload2352]

@@GaryFerraro Thanks for the quick response! The excess heat is why I'm limiting usage to short hops. So, I may have the cause/effect of the two conditions reversed. If so, and it's not the sensor's signal to the ECM, I need to know why the converter's not locking up. If it's a Big Deal, like a converter replacement, then that's a car-killer for this '98 volvo, but if you have other suggestions about what to look at that might be more do-able, I'd appreciate the chance to save the car. It may help you to know that the "failure mode" here was "gradually reduced periods between the Check Engine light coming on after clearing the last code, until it would basically come on right away." If that triggers a light bulb moment, let me know! Too bad for me you're not in Seattle. Thanks again.

[@GaryFerraro]

@@upload2352 You could have a bad converter, could be a worn pump or stator bushing, faulty TCC solenoid or problem in the valvebody

[@upload2352]

@@GaryFerraro Thank you for that helpful guidance. The transmission shops around me don't have the best reputations, unfortunately. Last question - whether I decide to get the problem checked out will depend in part on whether the repairer can even get the replacement parts. Are the parts potentially "at issue" you mentioned currently available to the industry? Or obsolete?

[@GaryFerraro]

@@upload2352 Parts are available for this transmission

[@MrBahengam]

thank you!🏆🏆

[@HabaneroTi]

So I assume that with fused steels and discs, you have to replace both and can't reuse even the steels? I'm working on an A140E from a '92 Camry that has no reverse and a similar likely cause, a blocked cooler line (some idiot mechanic forgot to remove the factory plug when installing a new radiator) leading to no oil cooling and overheated oil. I have the trans mostly apart but haven't examined the parts in detail yet so I don't know yet if it's worn friction discs, a worn band, fused steels and discs, stripped gears or splines, bad valve, etc.

[@GaryFerraro]

cannot reuse steels

[@jrod96819]

Anyone know ballpark cost of this transmission rebuild I’m assuming this is the one my son has in his 3rd gen sr5 4wheel drive 4Runner with a 3.4 motor? Help would be appreciated🤙🏽

[@GaryFerraro]

what year is the car?

[@jrod96819]

@@GaryFerraro 2000

[@mikejeff1019]

I need help my transmission is only working in reverse it is a a340e from a Lexus sc400.. it will go into gear if I hold brake a give it a Little gas it will move forward gears an shifts good then when I come to a stop a no gears. Have to move to neutral then back to drive hold the brake an Lil gas then it will jump into gear. what could be the problem be??

[@GaryFerraro]

fluid level is full for sure

[@3stargarage]

sir please help me my customer toyota land cruiser runing 20 min after reverse gear not working stop engine restart engine then working revesr perfect replay sir🙏🙏

[@GaryFerraro]

have you scanned for codes? what year is this car?

[@3stargarage]

@@GaryFerraro sir 2005 land crusir

[@GaryFerraro]

Question, If you put the car in drive, let it engage in drive then select reverse will it have reverse?@@3stargarage. The transmission is called A750

[@3stargarage]

@@GaryFerraro customar tel me some time not working reverse stop engine and restart engine then shift perfect not all time customer says 2/3days 4/5 time happen

[@GaryFerraro]

If he looses reverse then shuts the car off and restarts it and has reverse with no problem this may be an electrical problem, do you have a scanner that shows live data?@@3stargarage

[@ronnadmartins9023]

This vehicle only lost the reverse?

[@GaryFerraro]

yes because a clutch pack was locked together

[@clintonsmith9931]

Why does everyone call it a key way when it is a key made from key stock The key way is the slot cut in the shaft in witch the piece of key-stock resides I must have been born many years too early

[@GaryFerraro]

Thanks for the info

[@Ashroyer86]

First