THE
AUTOMATIC
TRANSMISSION
Reverse
Confirm that there
is
drive WITH engine braking.
Drive (automatic)
Check the speeds
at
which all up-and down-shifts are
changing (these are detailed below
on
the 'CHANGE
SPEED CHART').
NOTE.-In
suspected cases
of
faulty transmission gears
and/or clutch units, a stall speed test should
be
carried out
in all gears to determine
which
of
the clutch units and/or
brake bands are faulty. The mechanical power
flow
diagrams indicate the components in use for each gear.
H there is slip in all gears a
Iow
oil pressure is indicated
which
should
be
confirmed by a pressure check as detailed
in
Section Fa.2. •
•
Manual 2,
3,
4
Confirm that there is drive
WITH
engine braking.
Section Fa.1
Manual 1
Confirm that there
is
drive with NO engine braking.
Neutral
Check that there is key start in this position only, and
not in the drive positions.
FAULT DIAGNOSIS
Road test procedure
It
is
important to carry out a road test in all cases
of
suspected faults in order to confirm which component(s)
of
the automatic transmission are faulty or require
adjustment.
In
suspected cases
of
slip or poor acceleration a con-
verter stall speed test should be carried out as detailed
in Section Fa.2.
Check the performance in all seven selector positions
as given below:
Fa
CHANGE SPEED CHART
Selector Position
Throttle Position
Gear Shift
M.P.H.
Km.P.H.
'D'
Light
1-2
10-14 16-22
2-3
15-19 24-30
3-4
20-24
32-39
'D'
Kick-down 1-2 25-33
40-53
2-3 37-45
60-72
3-4 49-57
78-91
'D'
Kick-down 4-3 43-39 70-64
3-2
35-31
56-50
2-1 22-18
35-29
'D'
Closed
4-3
20-16
32-26
(roll out)
3-2
14-10
22-16
2-1
8-4
12-6
•
•
Fa.l4
,
..
l!'~'.t·
MINI. Issue
2.
16495
mk1-performance-conversions.co.uk
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