COMPUSHIFT II Manual – COMPUSHIFT II Manual
Preparing for Your Installation
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1.7 Installation Notes for GM 4L80E / 4L60E Series
1.7.1 Transmission Output Shaft Speed (TOSS) Sensor
A few different types of Transmission Output Shaft Speed (TOSS) sensors are used in the GM 4L80E / 4L60E Series.
Two (2) different adapter wires are shown here. In both cases, one side of the adapter wires plugs into the TOSS
sensor; the other plugs into the COMPUSHIFT II wiring harness.
The connector with the orange gasket fits early-4L60E transmissions.
The connector with the blue gasket fits late-4L60E and all 4L80E transmissions (see note below).
1.7.2 Transmission Main Plug
Early GM 4L80E transmissions had two (2) types of main body connectors: one is used today, but the other (pre-1994
shown here) is
no longer available.
While COMPUSHIFT II does
not
provide the connector for the discontinued
model, fortunately, it can be easily fitted with the internal wiring harness / plug from a
late-model
GM 4L80E. Order
it from General Motors, Part No. P/N24200161, and have a qualified transmission shop install.
1.8 Installation Notes for Ford AODE / 4R70W / 4R100 / E4OD
Ford transmissions have the following positions on shift lever: Park, Reverse, Neutral, Drive, 2, and 1. Unlike GM,
there is no third gear selection. Instead, most Ford vehicles are equipped with an Overdrive Cancel switch and
indicator. When selected, this switch prevents the transmission from shifting into 4th gear while in Drive, and the
indicator illuminates to show that Overdrive (4th gear) is disabled.
Though the COMPUSHIFT II Kit does not provide it an Overdrive Cancel switch, one can be connected to the wire
labeled "OVERDRIVE CANCEL" on the Engine & Power wiring harness. Connect this wire to a SPST/NO, MOM (single-
pole, single throw normally open momentary) switch that connects to ground when turned on.
