Transmission case sleeves, ZF 4HP22/24 EH valve body questions

[Annddrriy]

I already mentioned earlier what happened with car I drove last time in post 518. Car stop moving forward after second gear shift on then car stall and I put shift range switch to reverse gear it moved 2 meters then stop. Forward gear clutch pack is burn out. Time came to change clutch A which is go down first in automatic transmission. Car did not run over 50.000km.

[Annddrriy]

In your previous post you were write about 8-pins wire loom hard to find out from another car. The 7-pins wire loom not exist in the E32 735i models. I'm not sure about E32 750iL 1994 models it might has 7-pins wire loom and 750iL models for sure takes E-9 version which is has 7-pins connection on the valve body.

[shogun]

In your previous post you were write about 8-pins wire loom hard to find out from another car. The 7-pins wire loom not exist in the E32 735i models. I'm not sure about E32 750iL 1994 models it might has 7-pins wire loom and 750iL models for sure takes E-9 version which is has 7-pins connection on the valve body.

It does not matter if 750 or 735: 4HP22/24 Transmissions made before around 09/88 - 12/1988 have an electrical control unit inside the box that is controlled via 8-pins.Transmissions after that have a control unit with 7-pins.
Here pics from a 735 conversion from 8 to 7 pins http://bmwe32.masscom.net/johan/gear...rbox_swap.html

[Annddrriy]

Ok thanks ! I did check all wiring connection between all ECM I didn't find anything missing all connected good also volts presents every where it needs. The problem is in switch box of the transmission to not shift gears properly. Some of the shift valves prings has mess it up in the valve body.

[Annddrriy]

All solenoids shifts good except when 1st gear shift ON MV2 solenoid not turn ON and on 3rd gear MV1 solenoid not turn OFF as suppose to be in repair service manual. Where is correct in the manual or as its in the vihecle ? If car would has electrical problem then it would not shift gears at all. Same thing with the springs mess it up in valve body. The spring of the pressure regulator valve is too soft it builds pressure in the regulator valve moving more than should be.

[Annddrriy]

I hope so transmission mechanic going to replace the pressure regulator valve spring wire diameter 0.80 to soft spring same like in transmission 5hp18 pressure regulator valve spring with wire diameter 0.40 then all gears will shift smoth.

[Annddrriy]

Any one know if is center transmission case are same where valve body A touch to the case in BMW 735i E23 and BMW 735i E32 ? Thanks in advance for your answer !

[shogun]

That you can check in the online parts catalogs, if there are different numbers and there is always mentioned fits to Stucklistennummer......

[Annddrriy]

Online parts catalogue it will give different number of the hydraulic electronic version has hole in the case for valve body wire harness and number should be different. If the oil feeding hole located same place online parts catalogue does not write about it.

[shogun]

If different part numbers, then most probably not interchangeable.

[Annddrriy]

Transmission driveshaft output flange from ZF4HP22H can replace to ZF4HP22EH ?

[shogun]

4HP24 has p/n 24211217314 and is only used on 4HP24 on E32 750 and E31 850Ci with 4HP24, the collar nut 23221201331 holding it is M20X1,5. 1991 735iL US spec has output flange 24211217135 , Only applies to eh-control, collar nut is same 23221201331 M20X1,5. output flange 24211217135 is used on lower powered than M70 engines, like E30 M20, E28, M10, M20, M21, M30; E24 M30; E23 M30, S38; E32 M30.
As the collar nut is same size on both, I assume the flange connecting to the driveshaft is larger in diameter on the 4HP24, as the 4HP24 driveshaft is stronger too. driveshaft 26111227202 only used on M70 E32.

[Annddrriy]

Mechanic rebuild transmission car not moving reverse and forward. He said valve body not good because it make a lot of pressure. I replace valve body to another one still same. Oil leaking from torque converter and then shift selector is set to D noise coming from transmission when selector is set to R more noise coming from transmission anyone know what he could did wrong ? Thanks !

[shogun]

wrong wiring? see post #534 from whiskychaser, quote: Originally Posted by Annddrriy: 4 and 11 must be engaged in the reverse gear otherwise the vihecle won't move anywhere. 4 and 11 and 5 and 8 is reverse gears.
============================
Please look at the file in Shogun's link. And page 26 of the Tech Guide.
If you engaged the clutches you suggest, you would end up with a forward and reverse gears being applied at the same time. Is this what happened to your car - you wired it like that and have blown the trans as a result?

[Annddrriy]

Mechanic said he does not like how car shift it need another valve body. Reverse gear works from manual shift valve. I did not wired anything in the car it is all same as was before. Car was running good before till forward clutch burn out. Mechanic replace forward clutch car was moving 3 km then stop and no reverse gear. I turn engine off for few minutes then start again it was moving another 3 km then stop moving forward and reverse.

- - - Updated - - -

I think he did not rebuild transmission properly.

[shogun]

I think he did not rebuild transmission properly.

No one on the forum can comment on the quality of work of your mechanic. We do not know him. If he is a qualified ZF automatic transmission expert and has done the work before, there should be no problem, 4HP trans is no high tech trans.

[Annddrriy]

If to put valve body from Porsche 993 with external oil tube on it and added governor on the back side of transmission it will work ?

[shogun]

A Porsche valve body is probably different from yours and also the transmission control unit. If I would decide for my own car: I would go 100% original configuration as it was delivered ex BMW factory
Europeantransmissions info is it fits only Porsche 993 ZF 4HP22

[Annddrriy]

The valve body with external oil tube has no wire on it. This is ZF4HP22H hydraulic version same as BMW 735i 1982-1985 E23.

[whiskychaser]

If to put valve body from Porsche 993 with external oil tube on it and added governor on the back side of transmission it will work ?

It is highly unlikely that someone will confirm if a part from a Porsche 993 trans is going to fit your car. Nobody will have tried it. When replacing parts, it is always best to refer to the ZF part number for the trans. It is on the side of the trans. Then refer to the parts list for it . There is a risk that what you select will not fit/work if you don't. Even if the governor did fit on the later output shaft, how would it be operated? Do your case and throttle body have provisions for a throttle cable?

Take Shogun's advice: go 100% original configuration as it was delivered ex BMW factory

[Annddrriy]

It is going to operate like hydaulic version valve body. Throttle body will work with the engine and TCU will be disconnected and on dashbord will apeare trans program. Who cares what it is on dashbord apeares. The transmission will work right like hydraulic version.

[Annddrriy]

What is apply gap between friction discs on forward gear clutch pack ? It is about 0.70mm. He did about 2.3mm it is to much and when ATF applying clutch pack oil has leaking throgh it and clutches slip without lock up.

[shogun]

The advantages of a EH against a old style hydraulic only system:
A functioning EH valve body will adjust the mainline pressure automatically. Landrover manual, page 16, 17 : Pressure Regulator Solenoid - MV5
Fluid pressure regulation in the hydraulic ZF transmissions is controlled by a combination of spring pressure and modulator pressure.
In the electronic ZF MV5 controls mainline pressure to a degree not possible with hydraulics alone. The electronics allow almost an unlimited range of pressures from very low during light throttle shifts to maximum pressure during hard acceleration. Operation of the solenoid MV5 is described on the next page 17
The simplified illustration below shows the pressure regulator solenoid. The solenoid is sprung normally closed. When power is applied the valve opens and some of the mainline pressure bleeds off through the vent reducing actual working pressure. Maximum pressure occurs with the valve de-energized or close. The pressure regulator solenoid is adaptive and over time will adjust mainline pressure to suit driving style. Sedate driving habits will result in lower pressures than aggressive driving. Lower pressures improve shift qualities but can result in slippage. The ECM constantly monitors clutch slip time and adjusts the pressure accordingly (the ECM is programmed with an '"ideal" nominal time). This not only accounts for driving style but also for clutch wear http://bee.mif.pg.gda.pl/ciasteczkow...p22/4HP_22.pdf

[whiskychaser]

It is going to operate like hydaulic version valve body. Throttle body will work with the engine and TCU will be disconnected and on dashbord will apeare trans program. Who cares what it is on dashbord apeares. The transmission will work right like hydraulic version.

Cutting the power to an EH valve body does not convert it into an H. What it does do is give you one high forward gear and no pressure regulation. The 'H' valve body contains a pressure valve but it seems that you are not using that. You have already said that your mechanic believes the pressure to be too high so this sounds like a step in the wrong direction. Perhaps consider how you are going to mount the governor support and fit the governor. To my knowledge, there are 5 different output shafts for the 4HP22 and they vary from 8.25 to 13.25 inches in length. Which one will you chose? The H transmission requires a TV cable but the EH does not. Does your case have provision for one and what will you attach it to? If you can't answer these simple questions, perhaps forget building some kind of hybrid and stick to the EH?

[Annddrriy]

BMW 735i E23 1985 do not have TV cable it has just manual selector on drivers side that is all it has.