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Yes, I've seen SR5s with and without sunroofs in the junkyard.
O/D is simply 4th gear on your transmission. If you turn it off, it will only upshift to 3rd gear. With it on it will upshift into 4th. It is common to turn it off when going up a slight grade to keep the transmission from shifting from 3rd to 4th and back constantly and your car will feel more powerful because your engine is in a higher RPM range. If everywhere you drive is flat, just leave O/D on.
Last edited by SuperRA; 07-12-2010 at 01:27 PM.
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