Case 580SR Service Manual page 170

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104 SECTION 21 - TRANSMISSION
Speed Ranges
The microprocessor controlling the powershift trans-
mission is pre-programmed to control the speed at
which the gearshifts take place.
This effectively protects the transmission from ex-
cess forces, should gearshifts be selected at higher
speeds than is desirable.
(Except 695SR) shown in the chart opposite with an
18.4 X 26 R4 tyre fitted is the approximate (within
10%) maximum speed available and at which speed
an automatic shift takes place in each gear.
(...) = Automatic upshift speed
[...] = Automatic downshift speed
As it can be seen, when downshifting from the 4th
gear at a maximum speed of 39.5 km/h, the micro-
processor will not allow the downshift to take place
until the speed has dropped to approximately 19.9
km/h.
Refer to the chart for the details regarding upshifting
and downshifting.
NOTE: in some countries the road speed of 40 km/h
is not allowed. In these circumstances the transmis-
sion is governed to a maximum of 30 km/h and the
shift speed range reduces accordingly.