Cummins 6-Speed G56 Transmission Disassembly
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- Опубліковано 5 вер 2024
- How to rebuild a Mercedes-Benz 6 Speed G56 manual transmission in a Dodge Ram with a Cummins turbo diesel.
For Assembling 1st, 2nd & Reverse Gear: • G56 Transmission Assem...
For Assembling 3rd, 4th 5th, & 6th Gear: • G56 Transmission Assem...
For Article: www.cumminsforu...
Great step by step video, no-nonsense. I will archive this in case i need to break down my g56. Thank you.
I not sure you read these videos . I having a problem with my rebuilt g56 transmission leaking gear oil at the rear of the transmission between the tc and transmission. . It's gear oil . New out put shaft ,bearings ect , this is the second seal installed. Thanks for your time
Where did you get that big puller from? Fixing to have to rebuild my g56
Would love to know where that puller came from myself
I took my g56 out of my 6.7 because my clutch was well past when it should have been replaced. The input shaft is not very smooth anymore and seems to be worn and gouged. If I just want to replace the input shaft is it as easy as copying you and lifting the old one out and setting the new on in making sure it mates with the gear and closing it back in the case and putting the Allens for the pivot pins back in
I did all you said but you missed something in your video ,you have to take the 2 bolts out at the bottom of the shift rails in order to get the shafts to clear
Why didn't you show counter shaft? Would have been helpful
How do I put the front case back on, I’m having issues putting it together
I got a race in the front bell houseling spinning is that normal? Feels like a needle bearing is behind it.
is your puller home made? would you happen to have drawings for it?
Excellent!I don't even have the truck much less the G56 ,I even subscribed!
I'm glad you found it that useful! I wish the video quality was better, I have sense upgraded the camera and the lighting, so hopefully future videos will be a little higher quality. Thanks and take care!
I need my g56 freshened up can you help?
Ive got a groan at takeoff but can't pinpoint where its coming from. Is that a common sound out of a bad bearing on the trans. If I take off really easy it won't do it but a normal takeoff it does.
can someone help me find a part for my 2005 dodge ram 3500 6 speed i need g56 6th gear needle bearing nb6. tanks
Hey I was wondering if the oil slinger on counter shaft is necessary ..mine broke and I see in your video .the trans you disassemble doesn't have 1..also gorilla transmissions don't use it either is this ok ? Please could use the advice
I’ve got a 2007.5 6.7 Cummins with the g56 when I push the clutch in to start it it’s fine but as soon as I start to let it out theirs a loud grinding sound push back in and it stops, I can still go into every gear and even drive the truck in 1st and reverse but the grinding is still their any idea what it could be? I haven’t tried going into any other gear while driving since this happend, I was rolling in 3rd building boost and when my compound turbo setup started to light up I lost all power and the grinding noise started but it will still drive clutch has over 100k on it not Sure what I did haven’t had time to pull anything out yet
Atf+4 or synthetic 75w gear oil? 156,000 so far no problems with Atf4 & 33,000 oil changes. Just changed my front brake pads, so you can see I do 90% freeway & clutch should do 250,000.
ATF+4 does not belong in a G56, but it's not as simple as just getting any old 50w or 75w oil. I'd recommend either amsoil MTG or redline MTL. If you tow heavy a lot and live in warmer climates, consider Redline MT-90 for the extra viscosity. The really awesome thing about these oils is the super high viscosity index allows for better shifting while cold while not thinning out when it gets warm.
Check out post #9 on this article for a little more information on oils.
www.cumminsforum.com/forum/94-98-powertrain/2157993-cummins-benz-fusion-guide.html
Cheers!
@@CumminsWorks I've been running Amsoil 75-90 MTG for probably 70K. It works in cool weather and hot.
How can you make them not rattle so much. They are noisey
My reverse idle gear has a taller lip on one side any idea what way it goes the last one I did was the same on both sides
hey man, i’ve watched all of your videos related to this transmission. i was wondering how does the counter shaft come apart? i’ve had mine in 150ton press and it didn’t budge.
what is the torque spec for the throwout bearing retainer or input shaft retainer?
You have a video of taking gears off the countershaft?
No sir. Something I have yet to try and achieve
Any clips on pulling countershaft bearings. Heard they can be on there good!!
I do not, but I show the technique I use in post #6 of this article. www.cumminsforum.com/forum/94-98-powertrain/2157993-cummins-benz-fusion-guide.html
If it helps, I might have a shaft laying around I can use for a quick video.
My transmission get stuck on 2 gear and after released did the same what could be the problem
Failed synchronizer would be my guess. Is that correct?
In the beginning of the video around 35 sec your removing the bolts to pull the back end of the transmission off. I was wondering if you can tell me if there's a gasket there, where you're pulling it apart? mines leaking in that area. its not the shift boot, I've replaced that. just was wondering if I could just replace the gasket myself.
if possible could I know what the gasket or that area by the drain plug is called.
No gasket, just RTV from the factory
@@CumminsWorks thank you
Does the counter shaft gears spin on the shaft
It’s not supposed to, all the gears on the countershaft should be locked to the shaft
Great video. Got a question not sure if u can answer but ur best guess would probably be better than mine. I have a 14 ram 3500 with the g56. It has slack when shifting or let off the fuel. Everything is tight u joints, carrier, mounts, rear end. IT FEELS LIKE THE TRANS IS JUMPING UP. I'm new to the g56 world what are ur thoughts what should I check. Thank you in advance
From new my rear diff had play. You can use the driveshaft and check it.
Do you ever install front input shaft repair sleeves? I put a seal on and it leaks- there doesn't seem to have excessive play and no performance issues or noise..Nice video..lots of parts!
Hey it's me again. Going back together with my trans and have broken teeth on my 3/4 slider. Also have a small nick in the hub. Having trouble finding the 3/4 hub and slider. Do you have a source where you buy them? Also I have found the 1/2 slider for sale. If I filled the nick on my 3/4 hub can I use a 1/2 slider? They're the same size but don't know if they're interchangeable
hi I built my tools and opened up my transmission. I've got two clusters 5-6 &3_4 on the countershaft I have to replace along with sixth gear and all my bearings. question is how do you get the gears off the countershaft? I have a 20 ton press and torches but can't get them to budge. any help would be appreciated greatly
You do have to remove the front countershaft bearing, there's a snap ring under there. But after that you really got to press on the thing. I tried a 20 ton press and it didn't work either. I've heard a minimum of a 40 ton is required.
CumminsWorks ok that helps. I was trying to press gear and bearing at the same time. I'm hoping that my 20 ton press and torches will do the trick. as for reassembly I'm hoping freezing the shaft and heating the gears will do the trick.
where did you get the bearing splitter?
It's a homemade unit. Here's a video going into a little more detail. ua-cam.com/video/5nnNCJ0FrI8/v-deo.html
Take care!
can you split the cases with the transmission being clutch side down? I need to replace the rear housing and would rather not gut the transmission just to replace it.
I've never tried it, but I don't think you can. You really have to wiggle the mainshaft to get the countershaft out after the reverse gear has been removed. I don't remember for sure, but I believe I edited a lot of that out of the video to save on run time.
Yokes and nutts, did you ever end up finding out or did you have to pull everything apart? I'm in the same situation.
@@jonchiesa5173 I ended up selling the truck before I was able to attempt it. Hope you find your answer!
is that puller home made or where does a guy get one like that???
It's homemade, Miller makes a puller set specifically for the g56 though. Can't remember it off hand, but if you have the service manual it's in there. If you don't just Google "G56 Service Manual filetype:PDF"
Awesome
Glad you liked it! Thanks for the feedback!
Can you change the input shift without removing the case?
No?…
Where can I get the ntn bearings you use? And are they a better bearing?
brandon timchak I used Timken bearings in mine. Purchased them out of the EU. Ntn are factory, the Timkens were slightly bigger iirc. I made a thread ”G56 fusion guide”. I had the details in there.
Nice!
Thank you! If you have any questions about the process, I'm happy to help to the best of my abilities.
"Do dad" puller that's the ticket! Keep on engineering tools for the trade?
Is the G56 trans. The same as nv5600 ? These shops want so much to go thru on of these NV5600 trans ...WOW! I think I can do it.. It's the tooling up part that I don't like . Thanks for all help
The G56 and NV5600 are very different transmissions. I have never messed with a NV5600 so unfortunately I cannot be of help. Here's what appears to be a service manual for one. Hopefully it can be of help. www.scribd.com/document/322174571/NV5600-Repair-Manual
EDIT: After further inspection, that manual, while labeled for a NV5600, appears to actually be for a NV4500.
Here's a short and sweet version for the NV5600. blog.genosgarage.com/wordpress1/wp-content/uploads/2012/05/TDR64_RebuildingTheNV5600.pdf
If you're a member of Mopar1973man.com, they have a service manual for a NV5600 I'm pretty sure.
Best of luck!
do you guys do any similar videos for the nv5600?
just started with my transmission following your video very helpful thanks. so what I am going to ask you is how do I get the counter shaft bearing off? it needs replaced too, as well as the input shaft bearing and input shaft and seal pocket bearing. thanks for any input
I used a caged gear puller to remove the countershaft bearings. There are pictures in this article post #6. www.cumminsforum.com/forum/94-98-powertrain/2157993-cummins-benz-fusion-guide.html#post24992289
Take care man and best of luck!
Can the 6th gears be swapped between the first and second gen G56's without changing the other ratios?
Unfortunately no. The difference in the AE vs AD is the input shaft gear and corresponding countershaft gear. swapping them out will affect all the gears.
@@CumminsWorks So the difference between the two lies in the input shaft correct? 27 and 28 teeth? or is the countershaft gear also different?
@@px9172 both the input shafts and countershaft gear is different. Because of the extra tooth of the input, it's larger, so the countershaft has to be smaller to compensate.
@@CumminsWorks Thanks. I was considering getting an older input shaft to get a lower ratio for crawling. Might be impractical to swap vs getting a separate transmission
@@px9172 A lot of people like your higher OD gear, maybe you can find someone who wants to trade. Though the used g56 market is kinda sketchy.
How big of press does it take to get the cluster gears off
Some say they could do it with a 40 ton, but others have reported the need to step up to a 150 ton.
Ok thanks I blowed 3rd gear on the main shaft and the counter shaft I've got the main shaft gear replaced now gotta find a press to do the counter shaft do u have any idea what the part number is for the bearing that the back of the input shaft rides on
I've tried to find a generic replacement for that bearing, but with no luck. I ordered a Timken bearing with the same part number and it was even different. Best bet is to talk to a tranny place and get it from there.
I got my cluster gears pressed off took a 150ton press and a lil heat do think I should use some bearing mount or something on the cluster gears when I reinstall them
Do you still do rebuild services?
What is wrong with it? I could rebuild it, but I hope you understand that these things aren't cheap to work on as the aftermarket isn't offering any decent parts for them yet.
@@CumminsWorks
Hello, thanks for the reply. Yes I just had a nv5600 built for a good chunk of change, but I'm getting a slight fair size pop noise from my g56 when changing directions, this is making me worried that it may be going down hill when my nv5600 gave no signs of issue and flew apart.