722.5 Mercedes Transmission
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- čas přidán 13. 09. 2024
- This car came in with a no movement condition, i start by checking the pump, it wa ok, after getting the ok to open the unit futher, i show it torn down and go over the parts for this trans. The diagnosis on this unit was a blocked up filter not allowing any oil to pass through, converter checked ok.
Valvebody video coming soon.
I believe while watching this or one of your 722.5 videos, I took a screenshot of the Mercedes seal kit you showed while rebuilding or servicing the valve body. You made a point that the clearance is critical and for that reason, the OEM Mercedes brand was a must. Someone on ebay had several available just under $100 US, I bought 2 keeping the 2nd for future use. So, right after replacing those O ring seals in v.body, my reverse gear was losing grip after reaching operating temperature, which I'm assuming is the friction plate. I'd give it to a trans shop to replace only reverse clutch pack, since all forward gears are perfect, I'm just hesitant and may purchase a used trans and have it installed. The best part of this video for me is the general understanding I now have in order to communicate with a trans specialist (a must) and not appear to be completely naive, so I thank you for a thorough rundown !!
Reverse problems are very common, the clutches flake and may cause slipping in reverse
hi! Thanks for the video. I have a 95 sl320 and I've been learning basic tasks on it. This week I did the transmission fluid and filter. Both were original and didn't look too good, and the car now has 170k miles.
I managed to find a Mercedes workshop guide for this 722.5 online, and it says the amount of fluid has to be filled to the top notch on the dipstick, with the engine running and the fluid at operating temperature. The document says several times the amount of fluid has to be exact. Too little causes the pump to suck in air, and too much causes oil where it shouldnt be, and in both cases the fluid starts to foam and get into the pump and slowly kill it. I've been paranoid checking mine every 10 miles today to make sure. I think I have a very slow leak and just need to re-tighten everything...
After changing the new fluid, I also get a VERY slight grinding noise when in D with the brake, or in R. P and N are fine, and actually driving is fine. I appreciate this video because it looks like my B3 band is worn. I assume I'll need a rebuild at some point in the future. That being the case, for now I'll keep going until it stops working! (luckily I'm in socal and there are a dozen mercedes shops within 20 miles)
Thanks for the video!
Thanks for watching, fluid sligthly over or under wont hurt anything, to low the pump will suck air, overfill it may come out of the vent, the reverse clutch is common to go bad on these causing a delay in reverse.
2:25 Shift up delay solenioid, used when cold to heat catalyst quicker. Uses vacuum signal to change cable length to keep trans in gear longer.
I have this trans 722.5 now and it engages reverse but does not move. when revs are at 3000 it sloooowly moves back. i hear like a slight noise when engaged in reverse. like fibre clutch engaged. Drives forward no issue no noise. Oil is at full mark
Your K3 clutch is all flaked off, very common with the 722.3-4-and 5 units
May it be hidrotransformator??
Hi Gary, good video ! I saw your video before rebuilding a 722.5 transmission, which did not move in reverse, all other gears forward were perfect. Did not find any particular wear on the clutch plates nor anything broken. I did not disassemble the rear with the overdrive since it was working well. Found in the valve body one little cup filter totally plugged with debris. I cleaned all the valves and plungers in the valve body. Now the box is finished, reverse gear works and 1st also, but there is no upshift. What can it be , can you help with this ?
Check cable adjustment, Did you pull the govenor out?
Good day to you Gary. I have a transmission rebuild shop in south africa and enjoy your videos alot. Also find them very informative and helpfull. Thanks alot for all the effort you put into your videos. Did you ever found the fault on the no movement problem on the 722.5, im sitting with the exact problem here. Any advice would be appreciated...
I honestly do not remember, sorry. What type of transmissions do you work on in your shop?
so the filter ha , I found this problem before.! nice info thanks .!
+john CR Thanks, im editing the valvebody video. Thanks for watching
cool , I am looking forward to see the video.!
Thanks, working on it.
hello Gary! my 5th gear stopped working since one day I run with low fluid. any tricks I can try to revive it without stripping the tranny? solenoid for 5th is clicking, electrics checked (hgs, etc)
thank you and hope you can help me 😀
Surely you noticed that the convertor was "empty" when you removed/inspected it? Also, the 4 inches over-full must have been a give away that the filter was clogged? Had the customer ever had the transmission serviced?
Was there any point to pull off the pan before removal to check for problems?
I can only surmise that the reputation of this dastardly transmission preceeded it's arrival, and the worst-case-scenario conclusion was leaped to? ;)
Terrific Vid mate. Some very good information. Thank You!!
+Justin Bryant One this car justin, i honestly thought the pump was bad because of the fluid level, when i saw it wasnt teared into this trans and didnt find much, when i started looking at the filter saw it was coming apart and all bunched up at the intake. I didnt see the converter. This trans was overhauled by another shop a few years back but the owner of the car kept bringong the car back because it never really worked good, so when it stopped moving his friend said to come see me. He was just here he brought me his audi A8 for trans work, he said the benz is running good. Thanks for watching. Gary
I really got a lot of information from this video, thank you, I do have a 1995 SL320 with the 722.5 transmission. Would anyone know where I might purchase the separation conductor plate ? thanks in advance
Thank you for the video! Gary, do you think the 722.5 could be retrofitted into a 722.4 W124 E320?
This trans may look the same, but i dont think it will work. Ive never done it nor have i heard of anyone doing it, but the 722.5 has eletronic solenoids where the 722.3/4 does not. Gary
hello Gary :-) I wanted to ask you something, only you cn help me! i have missing 5th on a 722.501( 300 CE-24) and checked both kickdown and shifter switches.. There is no "HGS unit in my car, only "MAS". What controls the solenoid in transmision for 5th gear? dont know what to do!
if u have any ideas:
dada7809@gmail.com
THX!
Is this after overhaul? did it have it before?
hi☺ yes I had 5th gear and it stopped after oil leak and trans pan and gasket renewal. I'd like to check solenoid in valve body but dunno where it connects to in the trunk (some papers talk about his but there isn't any his here..)
what was the oil leak? did you have to disassemble the trans to fix the leak
just pulled a 772.5 transmission today. found a piece of a broken spring sitting in the top of the filter. The car engages drive and goes forward no problem but when engaging reverse it will start to reverse and then stop and jump forward. I've had the valvebody off and given it a basic visual once over should I strip the valvebody or do I need to open the rest of the box?
+Leon Roode Sounds like you have get into the trans on this one, once out, pull out the pump,drum and band right behind the pump. The set of frictons in the case are the reverse frictons, the material may have peeled off, common problem, not really sure where that spring came from, is it a thin wire spring?
cool going to start stripping it on monday. the piece of spring I would have to estimate to be 1.5mm to 2mm thick.
+Leon Roode on the pump is the piston that works the reverse clutch, check those return springs to see if thats where it came from
Thanks for the help I will start there and see what I find. It kind of confirms what I was thinking could be the issue.
Let me know what you find.
hi gary am having the same problem with 09g transmission the second one when transmission cold the reverse and 3 .4 gears are very hard and delayed and when transmission hot the car wont move is this a valve body bore wear issue
+issa alazzabi I would say no, if its acting up cpld and not moving hot. Question, when it stops moving hot and you turn the key off for a few minutes, start it back up again will it move?
+Gary Ferraro yes
+issa alazzabi Your filter is clogging up, something is going on inside this trans, you may want to drop the pan
Proszę Bardzo o pomoc. Skrzynia mercedes 722508 nikt nie naprawia u mnie w rejonie. Czy jest jakaś zamienna np 722509 lub 722503? Bo takie mam do kupienia. Auto w140 s320 1995r 722508 skrzynia. Auto nie jedzie ani na D ani na R ale czuć ze chce jechać obroty lekko spadają i teraz ciekawostka czasami przemieści sie z 20cm ale zawsze do przodu nawet na R też do przodu 20cm ale przeważnie stoi w miejscu. Co robić??? 😢
do you know which number differential should be used on CE320 1993 with 722.5 gearbox?
I do not sorry
Hello , my 722.5 is slipping on most gears, it shifts properly when outside air temperature is above 80f . Any idea whats the problem?
So basically slips when cold and not hot?
@@GaryFerraro yes, but when the outside air temperature is let's say.. 65 or winter time, it slips all the time. Today in CT temperature was 78 and transmission was shifting almost flawless. No one has the answer. This transmission was rebuilt few years ago, and since then it always had this problem, I was told. I have the car for the past 16 months. I went to two transmission shops and they want to rebuild it. One shop asked $4500 3 year's 100000 miles warranty and the other asked $3000
@@brabus8317 ok, would like to check a clutch application chart, could you tell me when it slips, (on the 1-2 shift or the 2-3 shift?)
How is reverse?
@@GaryFerraro ok, so I just drained the transmission and the torque converter. I have put dexron III fluid . I have noticed a little bit of tiny chips around the drain plug, they were silver in color, and the bottom of the pan was covered with a little bit of black dirt" just a little bit". Transmission shift's properly from 1 to 2, it slipping on the rest of the gears. I got to take the car for a spin and see how it shifts. And the reverse is very good.
Hi Gary! I have almost the same problem. It started when tranny starts shift up 2 to 3 and 3 to 4 at 4000rpm. When going at manual then shifts at the moment. Last owner says that the up shifting problem is causing the vacuum. And at the last i starded engine (engine was cold)then i was reserving, then put drive in and no movment. Back to reserve and still no movment. The funniest thing was that, when i put tranny on neutral and press gas pedal then car like want to move forward but not moving. And every gear is like that sometimes even in parking. And reserve acting same way. Not trying to move backward but only forward... I added the fluid to normal (was lower then minimum) and still nothing. Yesterday i removed the oil and pan. Oil was clean, filter looked old but not that bad for stop the oil moving. In the pan wasnt some metal and oil smells like it should be smell. I hope that someone can give advice me what i sould look. My first plan was replace the filter and oil and then try again, but i think that this not gonna help me.
ok, so you have forward and no reverse?
There is no movement. It like want to move forward but not moving (about 1-3cm and fall back) and act like that every gear. Even in neutral.
@@SuperJaxzzI have the same problem. Change oil and filter. No result. Did you ever figure it out?
Hi Garry Ferraro! I have a question about 722.5 (mercedes w140)! before rebuild is no 3rd 4rd and 5th gear please help me,i dont no what look...i replace nearly all parts...
It came in with this issue and still has it after rebuild?
Gary Ferraro yes yes You all write!....befor rebuild is not working reverse and 3th,4th and 5th, and now working 1st,2th and reverse only
What did you find when you went through the trans?
Gary Ferraro im find gap in k1 ther is 3milimeter,ks drum is opened the stopper is crushed,bs discs are damaged and deformationed,in valve body n49 sensor k2 piston spring is crashed i replace it i dont look guverner and reverse pump.. may it vacuum modulator?i dont what can i do
ok next question, is the 1-2 shift on time or is it late
Yes in ks drum, but i replace it... may be problem in the car? I dont no what look
Have you looked at the valvebody? Where the filter goes, is the aux. valvebody. Unbolt the plate from the au valvebody and look for small screens, they may be clogged.
+Gary Ferraro yes i look the valve body, its very clean, balls are ok, pistons like new,no any defection, nothing to replace in valve body... Filters is very clean, i dont look up the vslve body, under transmission... I dont know what look.... Im remplace another valve body on that trans, im replace another trans on car..... I dont no what to do...
Did you unbolt the aux. valvebody from thr channel plate(its held in with 4 screws) to make sure the small screens are clean. If all looks good start looking at your cable or your cable adjustment.
+Gary Ferraro im trying drive whitout cables no change.if hones no i dont look aux valve body
did you try hooking the cable up and adjusting it, your vacuum line hooked up at the modulator
Hello everyone, I have a 722.5 6 speed and it's loosing pressure in the reverse gear. It wouldn't really kick in on its own, but after sitting for 3 months, I put it in reverse and it goes, but still not with the gas pedal, has anyone encountered this problem and what was your fix?
This trans should be a 5 speed, common issue with reverse is the clutches flaking off, when this happens it starts to slip in reverse
Gary Ferraro thank you for your insight! I will take a look at that
@@realtalkwithvy9630 Ok, let me know what you find
yes
+issa alazzabi yes it moves with a very bang in 1st gear and some times it sticks in 5th gear and sometimes in 3rd gear and no reverse all this when hot
+issa alazzabi Is this the same unit or another?
+Gary Ferraro yes its 09g
+issa alazzabi If this works good cold and does all this when hot very good chance it is the valvebody, car is perfect cold?
+Gary Ferraro gary i sent you an inventation through hangouts