overdrive 4l80e 1996 ck 3500
is there a trailer mode switch in this truck,how do u prevent trans from shifting to overdrive when towing a trailer
Look at your shift indicator, it should show P for park R for reverse, N for neutral, D for drive 1, D for drive 2, 2 for 2nd gear and 1 for 1st gear. If there is no overdrive overide button on the shift lever then you put it in D for drive 2. that way it will have a 1,2,3 shift, no 4th or overdrive. You may still get the lockup converter function depending on computer programming in the ECM.
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