Question about overdrive - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 5 (permalink) Old 07-15-2009, 10:18 PM Thread Starter
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Question about overdrive

i read somewhere that driving around town with overdrive ON kills E4ODs. i just wonder how true this is, and if turning overdrive OFF when driving around town does much. thanks

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post #2 of 5 (permalink) Old 07-16-2009, 07:14 PM
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Re: Question about overdrive

I would say that's not true.
first, your transmission won't shift to OD until about 45, so below this, it won't make a single difference. (might be a bit lower if you have 4.10's)
above that, your transmission is set up to downshift before it gets too low in the RPM range, so it should not make a difference there either.
if you're towing something more than, oh, say 5Klbs or so, I would shut it off because i've heard the OD clutches aren't really made for towing. don't know how true this is though...

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post #3 of 5 (permalink) Old 07-18-2009, 12:53 AM
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Re: Question about overdrive

I would also say false, I have had one for over 20 years I'm the original owner and my truck was the first month production E4OD and I have never drove it with the od off. The only thing ever done to my trans has been fluid changes about every 30,000 miles. It has a 4.10 axle also

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post #4 of 5 (permalink) Old 07-18-2009, 12:56 AM
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Re: Question about overdrive

i always shut mine off hen i get into the truck just cause i think it is a pain in the a** when it shifts and when i want it to go in....just personal opinion

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post #5 of 5 (permalink) Old 07-18-2009, 03:48 PM
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Re: Question about overdrive

I have heard the e40d and 4r100 in the superdutys are built to tow in overdrive. The only reason you should take it out, is if ur towing at a speed that tranny is shifting in and out of overdrive a lot. That will excessive heat and wear. Thats what i have heard and read before.

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