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Old 01-09-2010, 11:17 PM   #32 (permalink)
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This link shows how to make a manual torque converter lockup switch for a dodge/cummins 48re transmission. The details will be different, but concept is the same. Beware, there are warnings about possible input shaft damage on stock components. I haven't done it yet, but am thinking about doing it in the future.

3rd Gen Mystery Switch - DIY - Works great! - Dodge Cummins Diesel Forum

Originally Posted by micondie View Post
I have been watching the SG in my 2003 Caravan 3.3 and noticing the increase in mileage when the transmission locks up. This happens about 42 MPH. This is a little fast for around town driving. Does anyone know what parameters the computer looks at when it locks up and if any of these parameters can be affected by altering sensor inputs without affecting driveability or mileage? This aproach seems to have the potential for significant improvements in city mileage.
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