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Unread 06-20-2013, 04:54 PM   #1
JoeFaz
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1999 WJ 
 
Join Date: Sep 2012
Location: San Rafael, Ca.
Posts: 68
O/D use?

I read something here once, but can't find it, now. I have a '99 WJ with the 4.7 V-8. I'm not sure when to use the O/D. I don't tow anything ( I may someday, just don't now), and most driving is only a few miles back/forth to work but it does include highway time. Is it preferable to use the O/D on a regular basis, or only when towing loads? I know nothing about what it's function is other than when I turn it on, my rpms go up. Does it effect the already crazy-bad gas mileage (12-16 highway, 10-12 city)?
Thanks!

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Unread 06-20-2013, 04:59 PM   #2
oaklyjeep10
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2002 WJ 
 
Join Date: Oct 2011
Location: Rome, Georgia
Posts: 473
All overdrive is in another gear. When you push the button to turn it off you're just keeping the transmission from shifting into the highest gear.
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Unread 06-20-2013, 05:00 PM   #3
narnwv
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2000 WJ 
 
Join Date: Sep 2009
Location: Cross Lanes, WV
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Od is always on. Leave it on, unless you're towing.

Typing on phones sucks.
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Unread 06-20-2013, 07:40 PM   #4
JoeFaz
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1999 WJ 
 
Join Date: Sep 2012
Location: San Rafael, Ca.
Posts: 68
Ahhh, I was confusing "off" with "on". D'OH!
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