A/T - ZF A/T Oil Leaks, Diagnosis, and Repair Information
SI B24 04 12
Automatic Transmission
June 2012
Technical Service
SUBJECT
ZF Automatic Transmission Oil Leaks, Diagnosis and Scope of Repairs
MODEL
All with ZF 5-, 6-, or 8-speed Automatic Transmissions
SITUATION
An oil leak has been found and verified as coming from the vehicles ZF automatic transmission.
PROCEDURE
8HP Transmissions:
^ No 8HP transmission repairs of any kind are to be carried out without prior ZF specialist consultation and approval via a TC PuMA case.
2010 BMW 128i Convertible (E88) L6-3.0L (N51) Page 50
5HP and 6HP Transmissions:
Any leaking external seal may be replaced, refer to the following list of components that can be repaired in the event of an oil leak:
^ Oil pan gasket
^ Radial seals (torque converter, selector shaft, and output seal)
^ Oil pump screw sealing washers
^ Extension housing O-ring (5HP models only)
^ Electrical connector O-rings or Mechatronic sealing sleeve
^ Screw plugs
^ Cooler line seals
All other ZF automatic transmission repairs for an oil leak are not approved to be performed, regardless if a repair procedure exists for it in ISTA.
The exceptions to this policy are any specific repairs procedures which are published in a Service Information bulletin.
Important!
Under no circumstances should the oil pump assembly ever be removed from any ZF transmission.
Specific questions relating to leak diagnosis and repair can be addressed via a TC PuMA case. The ZF team will provide a recommendation for the
proper approved repair.
If an oil leak repair is carried out and the ZF transmission is subsequently still leaking, a TC PuMA case submission is strongly encouraged.
PARTS INFORMATION
The EPC part description "supplement" information for ZF transmissions will contain the letters "HP" and end with the letter "Z." For example:
GA6HP26Z.
WARRANTY INFORMATION
Approved ZF Transmission Repairs
Approved ZF transmission repairs, as described above, are covered under the terms of the BMW New Vehicle/SAV Limited Warranty or the BMW
Certified Pre-Owned Program.
Non-Approved ZF Transmission Repairs
