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Old January 28th, 2011, 09:40
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DieselSJ DieselSJ is offline
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Join Date: May 2005
Location: QC AZ
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Re: Everything you ever wanted to know about the AW4

Originally Posted by ehall View Post
Good info Ken, thanks for getting this started. Here's some more data.

1987-1991 had a Power-Comfort switch that caused the TCU to change between two different shift tables. 1992 and later models did not have the switch, and used the Power mode by default.

On my 1991 model, the "Power" mode uses the following shift table:

3rd w/ torque lockup
Overdrive (no lockup)

When the Comfort mode is enabled, the table changes slightly, and also occur at lower RPM to produce a smoother shift

3rd w/ torque lockup
Overdrive w/ torque lockup
Are you sure about the OD with no lockup in power mode? That would generate A LOT of heat. Plus my '91 locks the TC in OD in power mode.
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