Jerk in transmission, -problem solved!
Good luck to everyone.
I did my best to comb through all the posts in this thread regarding this issue, but it was impossible.
Does this updated (blue top) solenoid really eliminate the issue? If so, it sounds like the dealership needs to install it to reset the trans. Correct? Any insight would be appreciated.
Cheers,
-Rob


I did my best to comb through all the posts in this thread regarding this issue, but it was impossible.
Does this updated (blue top) solenoid really eliminate the issue? If so, it sounds like the dealership needs to install it to reset the trans. Correct? Any insight would be appreciated.
Cheers,
-Rob
My car has 70k on it and only acts like this when warmed up. The 2nd owner replaced the OE radiator w/ a Behr and flushed the trans fluid when it had around 53k miles. The trans reset helps, but only for a short period.
Last edited by RPB; Jan 10, 2020 at 11:49 PM.


I need to do more research. I almost feel like everyone has their own fix for the issue, but it might not be the same thing going on if that makes sense. I read a few posts which sound to be exactly like what I am experiencing.
Thanks!
Last edited by RPB; Jan 11, 2020 at 12:15 AM.






I´m on the 2:nd change.. Slippery gearbox is another symptom of faulty PWM-solenoid.
The Best of Mercedes & AMG


Different solenoids in the gearbox operates different specific gears. The PWM-solenoid opreates the lock-up primarily and the gears too in a sort of "overhead function".




I have replaced my PMW solenoid (is TCC the same thing?) and initially thought.. 'wow - fixed!' and now.. a few years later it seems the issue is back...
It's not terrible.. just a little 'bump' occasionally at lower speeds. I don't get to drive it much these days and when I do... I love that she's still got tons of juice.
Certainly not itching to get back under the pan and do solenoid switching again. Just curious really...
I've never really figured out if my 40 MPH vibration is transmission related or not. I lessened it significantly by moving to a 1MM shim on the differential (from the 3MM stock? - I think). Thinking I should try removing it altogether and see how it feels.
I still have the Valeo radiator (had the trans fluid checked a few times for contamination - all good each time) and always wonder.
Anyway, interesting to see this thread come back. Good to know what others are experiencing.


If the PWM-solenoid is not working as it should it will not lock up as intended with a slippery drive. You can for example
feel it when gears change and it takes some time before the new gear locks up, sometime vaguely, it feels slippery.
So apart from it behaving brutal with cold engine; as soon from start it locking up for the first time, it can also behave
"slippery" as stated above if not functioning properly. If it´s harsh OR vague, change the solenoid!
Yes, I started this thread years ago! The problems are not uncommon with the 5-speed gearbox obviously...
My car's rough shifts are very noticeable when cold, but once the car warms up, it shifts a lot smoother. Not perfectly, but much better than when cold. My car has sort of a "slippery" gear change from 1st to second gear as well, particularly when accelerating quickly from a stop.
Thanks!




My car's rough shifts are very noticeable when cold, but once the car warms up, it shifts a lot smoother. Not perfectly, but much better than when cold. My car has sort of a "slippery" gear change from 1st to second gear as well, particularly when accelerating quickly from a stop.
Thanks!
Definitely feels like driveline as at the same speed after it upshifts, the vibration goes away.
I did change the driveshaft mounts as I was getting acceleration vibration in the driveline. Guibos were torn up pretty good. Replaced the driveshaft bearing too.
I also have the jerk when the the TC locks up around 1800RPM or so.
Sometimes it will even lurch like i'm pressing the throttle in and letting go really fast over and over(within a second).
I'm thinking bad TC, I don't think the TC solenoid not applying enough pressure would cause a vibration but I ordered it anyways.
Any ideas?
Also, you're correct, my car does have the 722.9 transmission. However, conceptually the issue is basically the same. Both have a solenoids that open and close to facilitate shifting.
Cant believe how smooth my e55 wagon is now.
All the Best Gav from the Uk
Hi Gav,
I'm pretty certain I have the same issue. I've posted on here before and I too have been putting up with this for almost two years. How much did changing the pwm solenoid cost you? Part and labour? Also how long have you been driving around since you replaced.
Thanks
Big mistake...
After that, I experienced a sudden jerk (like you´re hit from behind) at low
speed when engine and transmission were cold. After warm-up it dissappeared.
Couldn´t live with that so I let a transmissionspecialist look into it.
He took the gearbox off and changed following parts:
-converter
-both "freewheels"
-1:st, 3:rd and 4:th gears (3:rd gear looked burnt, the edges on the others
wasn´t edgesharp)
-conductorplate
-oil & filter
-all gaskets
-a greasevalve.
Got it back but the jerk was still there, but less violent.
Then he suggested to change the solenoid in the gearbox as well.
After that the gearbox performs brilliant without any jerks!!!
It goes like a dream now, really.
I suspect that loose dirt hit the solenoid at the first oilchange.
Voila, problem solved!
(It didn´t come cheap though...)
I'm pretty certain I have the same issue. I've posted on here before and I too have been putting up with this for almost two years. How much did changing the pwm solenoid cost you? Part and labour? Also how long have you been driving around since you replaced.
Thanks
The solenoid was £60 GBP factor in fluid gasket pan bolts must be around £150 gbp well worth doing
Definitely feels like driveline as at the same speed after it upshifts, the vibration goes away.
I did change the driveshaft mounts as I was getting acceleration vibration in the driveline. Guibos were torn up pretty good. Replaced the driveshaft bearing too.
I also have the jerk when the the TC locks up around 1800RPM or so.
Sometimes it will even lurch like i'm pressing the throttle in and letting go really fast over and over(within a second).
I'm thinking bad TC, I don't think the TC solenoid not applying enough pressure would cause a vibration but I ordered it anyways.
Any ideas?



