Hello sleepwalker,

regarding 560SEL 1991, recently we changed one of th ecars with a new break bond and clutch disc as well as the rebuilding kit, strangely we eliminated the shift shock (from neutral to drive, we get a strong kick our of it) now the shift shock is gone but the shifting from the initial drive to the next gear level takes effect on ly if you exceed 30 Km, if you do not reach 30 Km and release the gas pedal, and try to step the gas pedal at around 10 to 25 Km/hr it feels like there is a slipping clutch but when you try to step harder on the gas pedal to hit around 1oooRPM the gear will engaged again, it only happens on the first gear, the rest of the gears are working normal, all fluids have been check and the modulator box have been adjusted with a pressure guage based on the service manula books specification. Please advice how to make the ctranny shift much earlier. tried adjusting already the slider (located behind the aircleaner). I hope this should be enough information to go with. thanks for the private message, wil look forward on your software and kindly e mail to me or send it thru benz world. Thank You.

 

hello cool, welcome

i will check your datacard on monday to know your transmission model, and i will start from there.
it seems that all the basic things has been done already, and all we need is troubleshooting.

you mean 1-2 shift delay? i will try first to find out if your AT got this upshift delay vacuum box.

the fluctuation in the friction coefficient of brake band B1 can also cause this problem.
do you still got the parts list of the job done? was there a part with number 124 270 00 62/05 replaced? this part is taken into consideration when having such problem.

i will assume that the vacuum to the modulating box and is ok, and also the modulatingand governor pressure.

i will check also if you have the "B" switch on the shiftgate and secondary pump.

 

Hello Sleep,

Yes my transmission has a B shift as far as i could remember, my transmission has several 7 & 2 digit on the first 4 numbers (not so sure) and the modulating box was adjusted according to facotry spec using a pressure guage attached while adjusting, aside from the late shifting (which shifts to the next gear only at 30 kph ) is there a way for me to adjust to an earlier shift say 20 kph. The most irritating problem is when you start from a full stop without reaching the 30 kph and let go of the accelerator for a few seconds and steps on the pedal again, I would need to step deeper on the pedal to raise the RPM to a high of 1000 before the tranmission will engage into gear again, it only happens on the first gear but on all the rest of the forward gears there seems to be no problem at all only of the first gear upon engaging from nuetral to drive, but if I do not let go of the gas pedal from the starting point until it reaches the speed 30 KPH, the gear seems to be working just find, I have brought the car to cats as well as other so called mercedes specialist, but non of them seems to know what to do, most of their suggestion is to take down the transmission again adn change again the rebuilding kit (does not make sense at all) I think your right, theres just some fine tuning and adjustments that needs to be done, I look forward to your kind assistance.

In addition, If you can instruct me how to make the shift to next gear at a lower speed say 20 to 25 KPH it would be an alternative fix.

 

adjusting the modulating pressure will greatly affect the shifting pattern.

but you have to remember that it is the governor pressure that is most responsible for shifting according to speed.

>the pressure modulator box can be adjusted without any the tool (although you might need a flat screwdriver to pry-off the cover).
>remove the cover, and inside you will find a key (similar to the one we use to open the corned beef) loosely installed.
>pull it out slightly just enough to give rotary space for turning.

IMPORTANT: remember the position before touching it, so you can always go back when in doubt.

>turning it in will increase the modulating pressure, which will give you an early shift, but a more harsh engagement when you move the shift lever from "P/N" to "D"

PLEASE MAKE ONLY A MAXIMUM OF 1/2 TURN for testing purpose. do the 1/4 turn first, then observe.

i will give you the real specs later. the mechanics who are doing it are sometimes making an error... adjusting the wrong pressure specs.

 

We have tried adjusting the modulating valve, yes it can become too harsh when you shift and when shefting from one gear to the next, you get a very bad kick, now the adjustments have been done according to the factory spec, i personnally check on it while it was being adjusted by the mechanic at dealership (it was for free cause the owner was around) Regarding the governer, can that be adjusted and where is it located? Is it possible that the valve body may have a problem? (we call it the maze)

 

hello sleep, by any chance would you have any rear coil springs for 140 body? (standard coil spring) If you have (surplus parts) please sell it to me cause I really need it, I can make arrangements with a courrier company to help bring the item to Manila. Thanks

 

okay, your have B-Switch you said?
we don't want to go far without checking the basic ones especially when the problem relates to it. so we first start from the B-switch.
>check it first while it is installed, and by actual value from the computer, make sure that it is working properly (on/off). play with the shift lever if possible again and again until you are happy with the result.
go underneath the car and check the kickdown soleoid...valve and plunger. does it react accordingly with the B-switch and kickdown switch? play it again.
>check the hole of the plunger for any blockage (several times i found a piece of broken O-ring inside).
>check for function.... applying a direct voltage can be felt if it is clicking, functioning.


if this part is done,--------------->>> we will proceed to the next steps.

the governor pressure can be adjusted but only from the inside of the valve body.

i still cannot difinetly say that the valve body is the problem for many reasons. when i get there for holiday, take me along for test drive.

your datacard is not available as well, but i have a strong feeling that your transmission is 722.370. the vacuum box for modulator is black color. .the modulating pressure should be 4.0 bar

 

Hello Sleep,

When is your schedule to visit ? call me when your in town 726 1382 or 09178198195. We can meet and discuss many things and opportunity that may come around.

The B switch is working when I shif it to the B switch I can feel that the gears are working on the first gear, tell me how should it react when I shift to B?

Yes the transmission is the right number and yes the modulating box is colored black.

Except for the shifting irregularity at first gear, the car is basically in mint condition, and not a single dent on any part of the body, never had any repairs on the body or paint, its all original. I hope the tranny can be adjusted to get it back right on its original working condition.

Regarding the coil springs for 140 rear, I hope you can help me look for one in china , I really need it to get back to the original level, I intend to revivie that car, its been park for a while, it was lowered before and its not easy to use with the kind of road we have here. I was a ble to change the front back to its original coil but the rear seems to be displaced.

Also, I am looking for a CD changer for the same S500 car, if there are any surplus around with good working condition, kindly advice me. thanks and hope to see you soon in manila.

 

for the moment i haven't made my holiday plan yet. i usually go home twice yearly, depending on pressure. i will surely give you a call.

"B" means braking. you can use it if pulling a trailer, or travelling on extreme decents and long mountainous passes.
shifting is only 1st and second gear.

i will try to ask for the rear springs. is your rubber damper already on maximum size? this can lift up the height

the CD-Changer, i already have disposed those warranty parts yearly and so far it is very rare for models older than 1999 on the road here now. i only get daily encounters with newer ones. we have many reasonable electronic repair shop back there. have them check and do it instead.

 

hello cool,

i need a favor from you.

just in case you go back there in the workshop, would you kindly ask if somebody is interested to work here with me?

i need two good mechanics who are excellent in diagnosis using "STAR DIAGNOSIS" computer.

salary is very good (5X of what they are getting now), accomodation is free...fully furnished including PC and ADSL, and many more. i will assign them to other branch, and i will assist all the time.

i will return the favor to you for sure. thanks.

my numbers:

mobile: +86 13566261878
office: +86 0577 88606651
home: +86 0577 88695900