99lightning

im back to this I want to get a valve body for my car does anyone know if they are the same as the Chrysler valvebody? Otherwise I have to send mine out to get modified.

shardul

iTrader: (1)

from what i understand they are the same. i could be wrong

99lightning

A1402700069 is a valve body out of a SRT jeep

Dawson718

Go to highhorseperformance.com they have upgrade one for 599.00

whipplem104

The conductor plates are different but otherwise they are the same. Check out Ding's Racing in Vancouver WA. They have valve bodies for this as well.

SICAMG

One thing I can tell you...do not use IPT. I am a transmission builder by trade but did not know how/what to modify on the 722.6 valvebody. So IPT sounded very confident on the phone so off it went to them. I get it back and the trans will not down shift to first and finally stops moving when hot. I send it back and they said that the wrong pressure regulator was used so it was loosing pressure. Fine. But I can tell you the only shift that worked the way I wanted was the 3-4 shift. All the others there was NO difference at all. $600.00 for this. I ended up buying a used valve body and did my own exploring with that....then modded my own valve body. Everyone tells you that the 722.6 Mercedes is really "not modifiable" to the likes of what people want. But the Dodge boys do it to there's !!! And its the same shet!!

99lightning

hows your car shift now since you modified valve body

Hulk

^ ^^ +1

forcefed4door

Ipt is complete garbage. The owner is an excellent salesman, smooth talker. But man they f up a wet dream. They completely fubared one of my transmissions on an is300. Must have removed it 5 times and still couldn't get it to shift properly.

whipplem104

The difference in expectations in the Dodge market is huge. I do a lot of work on these transmissions and for both markets. The Mopar guys not only will accept harsh shifts that the Mercedes crowd will not but almost expect them or want them. The problem with most of the modified valve bodies out there are that in order to get the pressure up for firmer shifts you have to adjust the pressure by the same psi across the board. And that equates to very firm if not harsh low throttle upshifts and downshifts. Especially the 2-1 downshift. The other problem is that it is very easy to upset the balance of the two main pressures during the shift phase. You can end up with a transmission that binds up a little on the shifts and that may not be an immediate problem but can cause premature wear.
I have run the other products in cars and on a test bench and have logged the pressures as well. And honestly I do not recommend to Mercedes customers to buy one at all unless they go for a drive in a car with one and still say they want one. And unless you are making more than around 650-700 whp it is just a waist of money.

cm60k

^^

Believe whatever this guy said, his soooo knowledge with his stuff..

ZAYED,,

SICAMG

Every thing said is so true, Here is the problem that I have when it comes to mods that are intended to do something specific. Example 1 - I buy a TCU tune and I am told/sold on the fact that all these great things are supposed to happen when I put it in my car...and I see no change AT ALL and I am out 400.00 ...than something is wrong. Example 2 - When I am sold I a valve body mod for 600.00 and put it in only to find that only one shift really has any noticeable difference and now I am out a total of 1,000.00 plus time and oil's its very disappointing. Expectations are based on feed back from a vender and they tend to stretch things a bit.....or a lot !! I guess its just a learning curve in this industry on the consumers end. Oh well.


Hulk and 99lightning....its right on the money aside for a slightly early lock up but that's ok. I would have to work with a vender to retune the tcu and that's not going to happen.

Hulk

That's actually great news, I'm looking into this maybe, from logging you will see that a few hundred rpm before the shift the tb starts closing sometimes almost to 89% then shifts. I tried with many diff tunes but always the same, while the sl55 for example keeps the tb open 100% up until the shift. Something is different between these cars. I was hoping that maybe its a shifting difference between the 2

jmb614

I've noticed the same thing, sometimes the percentage varies as well. I'm wondering if it has something to do with torque management in either the ECU or TCU.

Hulk

Yup, but it will still go down, while the sl55 doesn't. Guys with zt2 will notice this more because it's real time. As for the tq management, I don't think so as I had mine removed and same this. I believe this is tune related but weird that the sl55 can get the same tune and their ecu doesn't start closing tb

99lightning

figured a set up valve body would help tranny life and just make things more crisp

whipplem104

I highly doubt that all torque management has been removed. The truth is that tq reduction during gear changes does not slow the car down if done properly. I have logged all of this and run cars with and without. What most Mercedes do during a gear change is timing reduction unless the requested torque from the tcu can not be achieved through timing then it will close the throttle. A mistake that can be made in tunes is to reduce or remove the timing pull. And what you want to do instead is increase the amount of timing that can be reduced and limit the throttle reduction. At full throttle shifts there is also some calculation on rate of acceleration and if timing alone can prevent hitting the rev limiter. This is also different that torque management during launches as it is a requested tq from the tcu. There are also protection modes sent from the tcu for different reasons.
Here is a log of a cl65 during a gear change. You can see the turbine speed and the tq reduction request from the tcu. Engine output will correspond almost exactly to the reduction request. What is important though is that the acceleration rate through the shift is there.

Hulk

Sent out the tcu numerous times and tried different variations of it, still same result, while my buddies sl55 with same mods and tuner will not start closing the tb a few hundred rpm before the shift. Really strange, this is not the first time this has been brought up, I did a search and this was also something coming up years ago but no one noticed the differences between the E and sl for some reason

whipplem104

The tcu does not request the throttle reduction it just requests a reduction in engine torque. The ecu makes the decision on what needs to be done to achieve this goal. Also if you are coming up on the rev limiter quickly the ecu will do this on its own regardless. So setting your rev limiter higher in the ecu could change this. You would have to know why the ecu is closing the throttle to know if it was a transmission tq reduction request or simply the ecu preparing for hitting the limiter. If you are in manual mode and do not request a shift does it still start closing the throttle at this rpm point? If so then it most likely has nothing to do with the tcu.

Hulk

I have never tried manual shifting since its unlikely I will be shifting at the track, but I'll do that experiment. I have numerous ecu flashes as well still same thing. Why does the sl with same mods and tune not do this. I know I'm not the only E with this situation.

whipplem104

Honestly I can not tell you exactly why one car would do this and another one would not except that it is in the tuning. But it could be as simple as what the rev limiter is set to in the ecu. Even a few hundred rpm can make the difference. But I am sure it is in the ecu side of things. I work primarily with transmission stuff and my understanding of what is going on is limited to the requests and responses. And I know a bit more on the Chrysler side of the engine tuning from people I work with. Again in the Chrysler products there are table for the amount of timing that can be used to reduce engine torque. We increase this to help achieve the tq reduction and prevent the throttle from closing.

Hulk

It has to be in the ecu at this point was hoping the tcu but will have to adjust the rev limiter on the ecu if that is even possible

Shifter

I built my own "electronic shift kit" and it can be mild to full firmness. steps 1-4

stockC43

More info please

cm60k

^^+100000000001..^^

ZAYED,,