| option - I wouldn't expect many people to be towing loads with these cars. If I'm not mistaken, most vehicles have the option to disable the overdrive for applications where a trailer or analogous having some considerable mass to it is towed. Running the trans in overdrive while towing something puts a lot of additional stress on it - running the trans in high-gear(1:1 ratio, non-OD) will bump up the RPM, maintaining line pressure in the trans as well as minimizing converter slip, all of which will help the trans from overheating. I'm not big on slush-boxes so there may be some (decently sized) holes in the info above, but the only other reason I can see for Nissan having a switched overdrive is perhaps to keep the engine revs up while moving at higher speeds - this will decrease the time it takes for the trans to downshift and turbos to spool in the event of WOT condition - more of a "performance" sort of user-configurable option.. If it were me that had an auto (never), in your situations I would simply leave it with OD enabled unless I was towing something or racing on the interstate (again, never).
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[ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving.
Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor.
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00:31:43 06/05/07
