Ich benoetige diesen Kugeldurchmesser:

Es geht um ZF Teilnummer 1043 226 028 Valve, "D" CLUTCH ONE-WAY CHECK VALVE ASSEMBLY aus Plastik, dafuer gibt es in USA eine modifizierte Kugel aus Aluminium: "Replacement" ALLUMINUM CHECK VALVE
https://web.archive.org/web/20…ulletin/DTC.BMW/01-34.pdf

Beschreibung des Problems und Beseitigung hier kopiert: BMW ZF-5HP-18 "BIND-UP" WITH SELECTOR IN MANUAL "2" POSITION, 1st GEAR

Before or after overhaul, vehicles equipped with ZF-5HP-18, may exhibit a "Bind-Up" condition in the Manual "2" position, 1st gear.The cause may be, the plastic "D" Clutch One-way Check Valve assembly located in the Lower Rear valve body, shown in Figure 2, may be broken allowing the "B" Clutch (Reverse Input Clutch) to be on while the "D" Clutch (Low/Reverse Clutch) is on in 1st gear. Replace the "D" Clutch One-way Check Valve assembly , as shown in Figure 1, with a new assembly from ZF, or a new "Aluminum" check valve assembly offered by: Mario Aristides.

jemand in England hat es nachgemessen fuer mich an einem gebrauchten Schaltkasten, die Abmessung:
4.56mm is as accurate as I can be. If I set my digital callipers at 4.6mm the ball slides through the jaws. The check valve isnt part of a kit so I would be tempted to get a new one from ZF, particularly as it is not the easiest thing in the world to remove.

Ob der jetzt schon Verschleiss hatte, ist natuerlich unbekannt.

Das Ventil komplett sieht so aus http://cobratransmission.blogs…alve-body-part-valve.html
ZF5HP18 Valve Body Part (Valve)
This is a small plastic valve or coupling used in the middle section of the valve body housing in the ZF 5HP18 automatic transmission used in the BMW. The part number is 1043 226 028. Only one is needed per transmission. This part is compatible with transmission part numbers (not all units listed):

- 1056 000 081 (24 00 1 219 955) Code: LW
- 1056 000 087 (24 00 1 421 214) Code: MG
- 1056 000 088 (24 00 1 421 411) Code: MN

Hallo André,
entschuldige, dass ich da jetzt erst drauf antworte, hatte Deinen Beitrag letztes Jahr nicht gelesen, da damals in Urlaub.

Haben den kompletten Ventilblock auseinander gehabt und gereinigt, auch die Kugeln nachgemessen und teilweise ersetzt, als auch die Papierdichtung. Laeuft wieder sehr geschmeidig nach der Ueberholung.
Bilder massig hier auf der Seite von meinem Schrauberkollegen, links 5HP18 anklicken, dann runterscrollen.
http://e32b12.blogspot.jp/
Die Papierdichtung im Schaltkasten hat folgende Nummer
1056 327 100 alte Version 5HP18
1056 327 110 neue Version 5HP18

Einzelteile hier fuer den Schaltkasten http://www.tsgparts.net/index.php?p=product&id=94&parent=55

hier noch mal Links

https://web.archive.org/web/20…ulletin/DTC.BMW/01-34.pdf

https://www.transmissiondigest.com/november-2001-issue/

Before or after overhaul, vehicles equipped with ZF-5HP-18 may exhibit a bind-up condition in the Manual 2 position, 1st gear.
The cause may be that the plastic D-clutch one-way checkvalve assembly in the lower rear valve body (#15 in Figure 4) is broken, allowing the B clutch (reverse input clutch) to be on while the D clutch (low/reverse clutch) is on in 1st gear. Replace the D-clutch one-way check valve assembly (See Figure 5) with a new assembly from ZF, or a new aluminum checkvalve assembly offered by Mario Aristides (phone 305-666-3544 or fax 305-666-8238).