O/D Or No In City Driving - 5.4L ???
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Joined: Mar 2011
Posts: 96
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From: Nova Scotia, Canada
O/D Or No In City Driving - 5.4L ???
So what's the concensus ..... is it better for gas milage to use O/D or not when doing city [non-highway] driving? In my prior truck [GM 5.7L] I found a notable improvement in throttle response and a slight improvement in gas milage when I locked out O/D [left it in "3" in that case]. Curious to see thoughts on this. TIA 
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Joined: Apr 2006
Posts: 1,501
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From: Butler, Pennsylvania
I always keep it out of OD if I'm going less than 45 mph for short distances with stop and go traffic. Not sure if it's better for gas mileage but I think it helps the transmission since it's not constantly downshifting/upshifting. Plus the TQ locks around 35mph so with it being locked the transmissions still staying cooler.
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Joined: Oct 2009
Posts: 6,172
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From: Missouri
I always keep it out of OD if I'm going less than 45 mph for short distances with stop and go traffic. Not sure if it's better for gas mileage but I think it helps the transmission since it's not constantly downshifting/upshifting. Plus the TQ locks around 35mph so with it being locked the transmissions still staying cooler.