ZF8HP45 Teardown

[@PorcupineLiberty]

Wow that’s impressive. Like a surgeon on the operating table. Found this video because I have a 528 with a 8hp45 that is giving a p0890 code. Started after jumping someone off. When the code goes away it drives perfect for 4 days then it comes back. Stinks because I never know when it’s gonna happen and I end up stranded. All the shops want to do is replace the transmission which will cost me more than car is worth.

[@GaryFerraro]

what is the definition of the code?

[@PorcupineLiberty]

@@GaryFerraro the p0890 is TCM Power Relay Sense Circuit Low. The transmission code is 420531 output stages voltages supply: short circuit to ground.

[@Mr-Foad]

Very impressive! you make it look easy! There are many parts on this that look very expensive and well made.

[@igotaction]

It had a 12345 code which is interesting because that is the same code to get into my luggage. Awesome video I was waiting for this transmission.

[@GaryFerraro]

LOL, Good to hear from you Joel

[@cleversonrfrancisco3509]

Parabéns por fornecer uma ótima explicação no Brazil não tem nada igual obrigado!!!!

[@GaryFerraro]

Thank you

[@ericdixon2898]

Love this channel!

[@imt5802]

Thanks a lot, Gary! There is always something new to learn when I watch your videos. Do you mind telling me how you remove the split-rings in general, because when I read through the ZF-Repair-manual for the 5hp24 for example, they always mention a mandrel-press and Special-tools, so I was wondering how you do it? Anyway, very helpful and absolutely informative! Keep it up

[@GaryFerraro]

I have a press and i found different size steel plates around the shop.

[@imt5802]

@@GaryFerraro thank you for the quick reply!

[@rodrigomeca]

Thank you. My car shakes a lot when im driv8ng very slowly going up the hill. When i press the brake i feel something disengaging and the shaking stops. Could that be the lock-up clutch in the torque converter?

[@tchapps88]

Hi Gary, have you ever had to tear down a 8hp45 or 8hp70 that someone had mistakenly refilled with ATF+4?

[@GaryFerraro]

I have not, just have to try your best to get the fluid out and refill with lifeguard 8

[@petar443]

Why did you sent the torque converter to converter shop?Leakage? Stator problem ? TC clutches problem?😊

[@GaryFerraro]

I had the converter overhauled, part of the rebuilding process

[@ericdisparte]

How similar is the 45 to the 51. And what’s the name of the disc tool you used? Thank you.

[@4doorsuprapk]

Hi do you have video on how get the split rings out at 23:00?

[@JDMsohc]

Hey Gary just curious, what does a rebuild like this cost?

[@TomekGarage]

Hello, could you give me links or the number of these special tools for opening clutch baskets? I mean those rings you're taking out of that gray suitcase. Thank you in advance, Tomek.

[@GaryFerraro]

A company called Adapt-A-Case has them, there part number is T-3500AC

[@TomekGarage]

@@GaryFerraro thank you 👍 Do these rings fit all 8hp gearbox models?

[@rllyhim2621]

Love the videos always so informative, I currently work for a dealer and want to get into transmission work any tips?

[@GaryFerraro]

some dealers do and some do not, they probably think much easier to install a reman, dealers around here do trans work

[@danieltrujillo5593]

That piece that you take out at minute 9:45 I want to know what it's called, what function it performs and what its function is. Can you help me on this issue by explaining it to me please?

[@GaryFerraro]

That part you will only find on Start/stop applications, This is known as the H.I.S Pump (Hydraulic Impulse Storage) Pump. When you come to a red light and the engine shuts off, this pump keeps the clutch packs charged with oil so when the engine starts up again there will be no delay on take off

[@danieltrujillo5593]

@@GaryFerraro Haaa that's fine I understand. But I would like to know if I put power to that pump, does it work? Or is it its function or how do you know if that pump has a problem?

[@danieltrujillo5593]

You're going to excuse me because I have a lot of doubts because I don't know how to know if that piece doesn't work. That part can cause problems when changing gears. My BMW has knocks, the 2-3 gear from there runs fine. then I slow down and 3-2 makes the hit. What could it be, can you guide or help me? and in the scanner I don't get any errors

[@GaryFerraro]

sounds like maybe a bad clutch pack. how many miles@@danieltrujillo5593

[@danieltrujillo5593]

@@GaryFerraro then the problem is not the H.I.S. for that problem?

[@JDMsohc]

Good evening Gary, I'm back with an update. So I ran some testing on my 8HP45 in my 3 series BMW, with code 420641 "Parking Lock Defectively engaged". ISTA said replace mechatronics, so I just swapped out the mechatronics and installed a known working unit, and got it coded to my car Whelp, after all that, I'm still getting the same exact single code, and still cannot shift out of park. Every time I try D, N, or R it just kicks right back to P. I read it could maybe be an issue with the parking pawl, but some suggested that if that was my issue, I wouldn't be able to put it into park, whereas my issue is the opposite and I can't get it out of park. Any suggestions? Thanks! - Shane

[@Jobrated46]

I'd like to ask a question, RE: reluctor I'm noticing on. Cams and wheel speed sensors; they have magnetic Reluctors... Including at the flexplate - as for inside the zf8hp45 ? What part number and what is the part name inside the trans ? Also, since you may answer, one more... Question; after a couple comments... my truck has the pentastar 3.6 with obviously the zf8hp45, I'm aware that the zf8hp70 is to handle more torque to mate onto the V8 hemi... Can I swap my zf8hp45 for a zf8hp70 ? Most appreciated

[@hfsmuts7749]

Hi Gary if i replace my bmw automatic transmission will there be any programming that will need to be done with the new transmission to work in the car?

[@BionLedBulbs]

Hi Gary, thanks for the video. I have an enquiry about my ZF8HP45 automatic transmission. The transmission oil was changed on 100,000 miles, and now the vehicle is on 139,000 miles. Recently, when the car shifts down from 6 to 5 and from 3rd to 2nd gear is kicking. I went to an automatic transmission specialist, and he ran a diagnostic. He checked for a leak, but no leaks or faults came up. What do you suggest I do next? Thanks in advance. Regards

[@frankwrenchman4573]

Thanks Gary

[@redrum192]

Have been following your videos for a while now and love them. I got a g30 530d, and there’s a strange problem. Car drives fine, but I get a P position not available error every time i park. Car physically goes into park (doesn’t roll as checked on an incline too). But still there’s the error, and the car can’t be locked remotely. Where do you suggest i look?

[@GaryFerraro]

has the car been scanned

[@redrum192]

Yes the error code is 420636 - position sensor - electrical fault at L4

[@GaryFerraro]

@@redrum192 clear the code and see if it comes back

[@redrum192]

Yes tried that but it keeps coming back. No problem in driving or reversing, but just won’t let me park and lock the car with remote

[@KalebBroadhead]

You are a ZF god

[@danthecarman8440]

Hi there. I have a zf6hp-28 on a Jaguar and im getting p2704 friction element e apply time. It only happens after half an hour of driving. We have already replaced the E Clutches and bushes and accumulators. Any suggestions please ? as im at a lost. Many thanks.

[@GaryFerraro]

you have 1 of 2 problems, either your rear stator bushing is worn or solenoids mechanically clogged. Being the fact that it happens when warm, i would think the rear stator bushing is your problem

[@danthecarman8440]

@@GaryFerraro Many thanks for your kind reply. 🙏

[@davidj5188]

Great video thank you. The 8HP in my 2014 Ram has started to slip and feels like it is trying to downshift briefly in any gear whenever the engine rpm is below 2000 ish and low load. If I manual downshift it engages fine and no real issues. No error codes. Any thoughts?

[@GaryFerraro]

How many miles?

[@davidj5188]

@@GaryFerraro 160,000 miles

[@davidj5188]

@@GaryFerraro been trying to figure out if it could be valves/solenoids or if I need to pull the transmission out for a rebuild.

[@GaryFerraro]

@@davidj5188 well, before you start going crazy with this, maybe try a shift adapt reset, may make the trans shift bad in beginning but as you drive it it should adapt, see if anything chages

[@davidj5188]

@@GaryFerraro will do

[@ebrahimsadeghi5883]

Doee is matter if how muck pressure/psi we apply on the piston for air check Thanks 🙏

[@GaryFerraro]

should really apply around 50 psi, if you use to much you may not see a leak if there is one

[@RobertDeWet-o1z]

Hi Gary great videos! You are very generous with your knowledge and time….kind of rare these days. I have a zf6hp26 on a 4.4l Land Rover 2006 that shifts perfectly and no codes but the 2 to 1 downshift thump on slowdown is driving me crazy. Would a valve body overhaul fix this? Truck has done about 150k miles

[@GaryFerraro]

The 2-1 downshift bump, do you feel that when the car is hot?

[@RobertDeWet-o1z]

Thanks for response mate! Yes, always no bump until transmission warms up.

[@GaryFerraro]

@@RobertDeWet-o1z That may be a valvebody problem, either the solenoid reg valve or lube reg valve can be worn, Transgo has a kit for that. Will have to ream out the bore for oversized valve.

[@RobertDeWet-o1z]

Thanks Gary for the advice. Assume changing solenoids, bridge seal etc would not help as the transmission is operating as designed (other than the car behind bumping me every time I come to a stop 😅😅)

[@GaryFerraro]

@@RobertDeWet-o1z How many miles on the car?

[@Jobrated46]

You quoted on this video ": Segmented magnetic ring that reads the speed sensor " after viewing this video a few times I now know one of two my questions Thx

[@GaryFerraro]

In side the Trans you have the input and out put speed sensor,

[@LeonardoCostaUSA]

Wow!! I can not believe that !! How can someone afford that valuable service?

[@AllanMercado-e7s]

Hi Gary, I have a 2005 Land Rover LR3 4.4l. The transmission won't go into 1st gear, it's stuck at 4th gear per my scanner. I can't move it w/o shutting it off, starting it back on and shifting to 'D' right away to move the SUV, ten to 15 seconds later, it will not move again. Am I looking at a solenoid issue? Thank you.

[@GaryFerraro]

Has the car been scanned for codes?

[@AllanMercado-e7s]

Hi Gary, sorry for the late response and thank you for responding. My mechanic did not keep the old codes. They have basically swapped the transfer case module with a known good one in hopes of solving the issue, not sure what this would actually do? I scanned with my AutelBt906, the codes I was able to pull are p2789-00 Clutch adaptive at its limit (intermittent) and u1a35-4a Vin Data (permanent).

[@GaryFerraro]

ok, so if you clear the codes the car should shift@@AllanMercado-e7s

[@AllanMercado-e7s]

I will try that tomorrow and advise, thank you

[@shaneswartz6053]

My ZF 8hp45 in my F30 335i is giving me one single code, 420641. It won't leave park, no matter if I try R, N, or D, it just automatically goes back to P. I ran it through ISTA and there was a test that had me turn the car on and off 10 times, and in between these cycles I'd have to attempt to put it in neutral. The final result was "replace mechatronics". Does this sound accurate? I figured if it was my mechatronics I'd be getting a lot more codes other than "420641 - Parking lock defectively engaged: plausibility, driver's command/sensor feedback". Figured I'd ask as you seem to know your stuff. Thanks!

[@GaryFerraro]

Only thing you can do is check the fluid level and check your electrical connection at the transmission

[@shaneswartz6053]

@@GaryFerraro perfect, will do, thank you! That's where the mechatronic sleeve is, correct? I've read that often times fluid can bypass that sleeve and get into the actual connection part and mess things up, but wasn't sure if that was strictly with the 6HP's, or if the 8HP's were also prone to that. Thanks again!

[@GaryFerraro]

@@shaneswartz6053 yes, the sleeve is where the wires are

[@shaneswartz6053]

@@GaryFerraro Ok cool, I'll run out now and check that out. I did just swap the pan/filter and also fluid, along with following the proper procedure for fluid fill with getting it up to temp and whatnot. For further context, when this shifting problem started a few weeks ago, I got the car home and drained the fluid and it looked like a light colored chocolate milk. Further diag showed that the trans cooler/heat exchanger failed and I got coolant/ATF mixed together inside the trans. That's when I swapped out the parts/fluid and now that I have it all back together I'm still getting that same single code, and same transmission behavior. Hoping it's just maybe something simple like that sleeve, but it's just unfortunate as nobody that posts this error code typically follows up with what fixed their issue. Glad you are fast at responding though, I appreciate that.

[@shaneswartz6053]

@@GaryFerraro Just hopped under there real quick to take a peak, and it doesn't appear to be leaking from that sleeve. I read that mostly that's an indicator, is that you'll see a leak coming down the side of the trans right there. =/

[@stingray6164]

where can p get a pair of those long snap ring pliers?

[@GaryFerraro]

Company called Adapt-A-Case sells them. The Yellow ones correct

[@stingray6164]

thanx@@GaryFerraro

[@brahim55]

Great video ,so from where come from that gear ration fault ?

[@GaryFerraro]

from the P2 planet being broken from the output shaft

[@Ragu8235]

Thank you, sir

[@ebrahimsadeghi5883]

Could you share the link of test plate Thanks 🙏

[@GaryFerraro]

My Buddy got the plate for me, says on it Mopar 10383A

[@CarlosGuzman-bs1vi]

My 2014 328i is giving me a transmission not in park error message and right before that the car is stalling. I had recently changed the Mechantronics that came with new solenoids as the car was hard shift over 2k rpm’s. The new one fixed that issue but now the car is giving me that stalling issue then giving me the transmission not in park message and can’t change gears anymore. Any thoughts on what that could be?

[@GaryFerraro]

Scan for codes

[@CarlosGuzman-bs1vi]

@@GaryFerraro I have a check engine for mass airflow sensors but I replaced and it still has check engine light. Need to go check again. Is there a different way to check codes?

[@GaryFerraro]

Trans has it's own TCM, did you scan the TCM@@CarlosGuzman-bs1vi

[@CarlosGuzman-bs1vi]

@@GaryFerraro no how do I do that?

[@GaryFerraro]

hook up a scanner and select transmission, have your key on and engine off, Do you have a scanner or know someone that does. Some cheap scanners may not be able to scan TCM@@CarlosGuzman-bs1vi

[@hfsmuts7749]

Hi Gary great video. Hope you can help me out i have a bmw f21 2015 model 1.8m sport problem with the car you can put it in drive and then go back into park code im getting 420641 and saying parking gear incorrectly engaged

[@GaryFerraro]

Trans is full of fluid? Have you tried clearing the code?

[@hfsmuts7749]

@@GaryFerraro Hi Gary. yes did try to clear the code but doesn't clear

[@hfsmuts7749]

@@GaryFerraro did al so removed all the fluid and fill again with new fluid stil the same changed the battery as well

[@GaryFerraro]

what kind of car is this?@@hfsmuts7749

[@hfsmuts7749]

@@GaryFerraro its a bmw f21 2015 model 1.8m sport

[@chuckswhip]

Love the videos…

[@masood1362]

Thanks lot❤

[@chuckswhip]

How much should a transmission rebuild cost ????

[@GaryFerraro]

These 8 speeds start at around 5K

[@robertrobertson192]

Great video but I believe that's te not a zf the te845hp are made in America while the zf is German made , you can tell by the casing. Internals are all the same but I thought I'd point that out anyway.

[@aldoaltamar5041]

Hi, good morning my friend

[@GaryFerraro]

Good Morning, Thanks for watching

[@CP-jt6bw]

If i sent you the same box what would this cost me?

[@GaryFerraro]

Can you tell me what the problem is? Any codes?

[@CP-jt6bw]

It's giving a very strong smell of ATF in the cabin. Motor is putting out 600whp 550wtq No other symptoms

[@GaryFerraro]

@@CP-jt6bw have you looked to see if it's leaking or coming out of the vent?

[@CP-jt6bw]

The blue vent area is dry. Trans and motor are currently removed

[@HanifEFIMechanical]

Good job

[@mahmoudhantouli5434]

Please complete to next video

[@mahmoudhantouli5434]

I wish If I can work 4 you

[@baratrahmani4023]

Hi please post the build on

[@alexanderstefanxandraswedi5835]

❤🎉😊

[@casualobserver620]

@26:45.....well, guess who is working on a Jeep. And finding a source for the shell...?????

[@GaryFerraro]

Have you tried Erickssons for the part

[@casualobserver620]

@@GaryFerraro Erickssons????

[@casualobserver620]

@@GaryFerraro I finally found Eriksson Industries (??) but they never answer the phone. Chrysler discontinued ALL internal parts for this unit.

[@GaryFerraro]

They were just busy, try again on Monday@@casualobserver620

[@danieltrujillo5593]

9:45

[@rafihussain]

Sir. Ya hd bn videoing from a long time. I again request a hd 4k quality content. Lighting need ur attention. Thanks

[@GaryFerraro]

maybe lighting, uploaded in HD

[@davesingh1859]

I just have a 2015 535 xdrive towed in with the same issue

[@GaryFerraro]

Check that P2 Planet

[@baratrahmani4023]

Hi please send me the air check all clutch please

[@gand3061]

Im korean i had 420421 ,421342

[@richH1625]

! amazing videos . So much knowledge ! Thankyou. __________________ just asking this here as its the most recent video,,, Do you happen to have a video of the correct way to check atf level? Is it the same in all boxes? Ive seen references to : engine running; hot; check level but ive also been told : engine running; hot; (chock wheels); run slowly through R D S L back to parkP; check level Thanks. ____________ particularly Mazda Friendee year 2000 2wd apparently en.m.wikipedia.org/wiki/Jatco_4R01_transmission

[@GaryFerraro]

Car needs to be on a lift and should be hot when checking the Trans fluid