
SECTION 7C4 - HYDRA-MATIC 4L60-E AUTOMATIC
TRANSMISSION: ON-VEHICLE SERVICING
CAUTION:
This vehicle will be equipped with a Supplemental Restraint System (SRS). An SRS
will consist of either seat belt pre-tensioners and a driver's side air bag, or seat belt
pre-tensioners and a driver's and front passenger's side air bags. Refer to
CAUTIONS, Section 12M, before performing any service operation on or around any
SRS components, the steering mechanism or wiring. Failure to follow the CAUTIONS
could result in SRS deplo yment, resulting in possible p ersonal injury or unnecessary
SRS system repairs.
CAUTION:
This vehicle may be equipped with LPG (Liquefied Petroleum Gas. In the interests of
safety, the LPG fuel system should be isolated by turning ‘OFF’ the manual service
valve and then draining the LPG serv ice lines, before any service w ork is carried out
on the vehicle. Refer to the LPG leaflet included with the Owner's Handbook for
details or LPG Section 2 for more specific servicing information.
CAUTION:
Whenever any component that forms part of the ABS or ABS/ETC (if fitted), is
disturbed during Service Operations, it is vital that the complete ABS or ABS/ETC
system is checked, using the procedure as detailed in 4. DIAGNOSIS, ABS or
ABS/ETC FUNCTION CHECK, in Section 12L ABS & A BS/ETC.
1. GENERAL INFORMATION
As detailed in 7C1, material contained within this Section, details service operations that can be carried out on a
transmission while it is still installed in the vehicle, as well as the procedures required to remove and reinstall the
transmission assembly from/to the vehicle.
General servicing information is also included in this Section and it is recommended that this material be read and
followed, whenever servicing operations are to be carried out, on this transmission.
1.1 GENERAL SERVICE PRECAUTIONS
RECOMMENDATIONS
When servicing the transmission, all parts should be cleaned and inspected as outlined under 'Clean and Inspect',
in these recommendations. Individual units should be reassembled before disassembly of other units to avoid
confusion and interchanging of parts.
1. Thoroughly clean the transmission exterior before removal of any component.
2. Disassembly and reassembly must be made on a clean work bench. Cleanliness is of the utmost importance.
The bench tools, and parts must be kept clean at all times.
3. Before installing screws and other fasteners into aluminium parts, DIP SCREWS INTO TRANSMISSION
FLUID (Only use DexronÒ III) to prevent galling aluminium threads and to prevent screws from seizing.
4. To prevent thread stripping, always use a torque wrench when installing screws.
5. If threads in aluminium parts are stripped or damaged, the part can be made serviceable by the use of
commercially available, thread inserts.
6. Protective tools must be used when assembling seals to prevent damage. The slightest flaw in the sealing
surface of the seal can cause an oil leak.
7. Aluminium castings and valve parts are very susceptible to nicks, burrs, etc., and should be handled with care.
8. Internal snap rings should be expanded and external snap rings compressed if they are to be re-used. This will
ensure proper seating when reinstalled.
9. O-rings, gaskets and oil seals that are removed should not be re-used.
10. Teflon oil seal rings should not be removed unless damaged.
11. During assembly of each unit, all internal moving parts must be lubricated with transmission fluid.