BMW 1989-1995 525i Service Manual page 250

240-14
AUTOMATIC TRANSMISSION
ATF service-A4S 310R
A4S 310R transm issions may or may not be fitted with a
dipstick. Early versions of the A4S 31 OR were equipped with a
dipstick. On later models. the dipstick was eliminated.
On cars without an ATF level dipstick, it is recommen ded
that ATF level checking be left to authorized BMW dealer with
the appropriate temperature measuring equipment. The most
accurate check of the ATF level is best done on a lift with the
engine running in neutral and the ATF at a specific tempera -
ture.
WARNING -
The ATF should be warm when draining. Do not
drain the ATF if the engine and/or transmission is
hot. Hal ATF can scald.
1. Remove dipstick, where applicable.
2. Remove drain plug and drain fluid into container. See
Fig. 24.
~.......,o
o
I ,
o
0011595
Fig . 24. ATF drain plug (Al on A4S
31OR.
3. Remove rear (large) oil sump mounting bolts and re-
move sump and sump gasket.
NOTE -
The A4$ 31 O R uses inch bolls. not metric bolls.
4. Remove strainer mounting screws and rem ove strainer
togethe r with gasket. See Fig. 25.
TRANSMISSION SERVICE
0 - -
00 11596
Fig. 25 . ATF fluid strainer mounting bolts (arrow s) on A4S
31OR.
Installation is the reverse of removal. Always replace the
drain plug seal and all gasket(s). Clean the sump and the
sump magnet using a lint·free cloth . Use new bolts at the
sump and tighten the bolts in-line, one after the other (I. e. do
not tighten the bolts in a cross-wise pattern). Fill the transrnis-
sion with the specified amount of fluid. See Fig. 26.
.....
011743
Fig. 26 . ATF fill plug (A)
on
A4S
31O R.
NOTE-
• On cars
witt:
A TF level dipstick. check the A TF level
using Fig. 2 7 and Table e. The fluid level should only
be checked with car
on
level surface and unloaded.
• On
cars without ATF level dipstick. the car must be on
level surface and unloaded. preferably on
a
lilt. With
the ATF at a temperature of 30·5S' C (86· 131°F). re-
move the ATF tiller plug. Place the transmission
in
neutral and start the engine. With the ATF at the spec-
ified temperature. add ATF until it spills from the filler
hole. Reinstall the filler plug.