Loss of mpg after getting stuck - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 10-27-2013, 07:35 AM Thread Starter
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Loss of mpg after getting stuck

I went hunting two weeks ago in Colorado. Towing my camping trailer possibly 2.5-3k pounds. Hunting camp is at 9500' When I got there I loss traction in the snow and had to put it into 4wheel drive. Trying to get out I noticed the truck jumping in place as I was giving it skinny pedal. Never notice this before in any of my trucks prior to this. Also I could smell something was hot when I got there. Not sure if that's coming from the tranny or the engine. I had changed the oil the night prior.

After I got unstuck and got moving again and at the camp site. I turned the truck around and went to back up and all I could get was black smoke to roll out and the truck barely apply pressure to the tires. I had to rock the truck to get it to back up. Once I got it to move if I let off the pressure, I would have to restart the process of rock the truck forward and back to get it to move again.

Now on the way out there I went up in elevation from SLC to Co. On I-80 cruising at 75mph or just under 2k rpm and averaged 15-16.5 mpg.
On the way back I went on I-40 which top speed was 65. N but probably averaged 55 mph and got 10. Mpg. Now that I'm home and unhooked at at my normal cruising weight. I'm only getting 11.5 mpg.

My question are, did I screw something up in the tranny when I was stuck? or is all that normal because of the elevation? Or is the oil change part of my problem cause I used rotella?

Truck has 200k miles on it now. PO said that he had the tranny rebuilt around 100k mark. Is this a normal 100k mile rebuil?


Any thoughts would be appreciated.
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post #2 of 12 Old 10-27-2013, 07:41 AM
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Have you checked your hubs to make sure they aren't stuck locked?

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post #3 of 12 Old 10-27-2013, 08:09 AM Thread Starter
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How do I ensure they r unlocked? Lift the front end up and spin a wheel? Hubs dial should be turned counterclockwise?
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post #4 of 12 Old 10-27-2013, 10:37 AM
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if they are stock hubs they should have a arrow pointing which way to lock them.

jack up the front end with the wheels off the ground, if you spin a tire and the drive shaft spins they are locked in.

have you done any trans or transfer case maintenance?

trans case is often never maitenanced, it only takes 2 quarts of atf and 10 minutes to flush and refill.

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post #5 of 12 Old 10-27-2013, 02:34 PM
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Quote:
Originally Posted by gr8outdoorzman View Post
How do I ensure they r unlocked? Lift the front end up and spin a wheel? Hubs dial should be turned counterclockwise?
U should be able to just reach behind and spin the axle with the u joints in the hubs.

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post #6 of 12 Old 10-27-2013, 06:14 PM Thread Starter
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I had the wife who isn't colorblind to look at the trans oil. It's probably browner then it should be. So I will drain that and replace the filter. Anything else besides the trans case. Which I might as well do all at the same time.

And they r stock hubs, But they have no visible markings.

Last edited by gr8outdoorzman; 10-27-2013 at 06:21 PM.
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post #7 of 12 Old 10-27-2013, 06:18 PM
Ordnance on coordinates

 
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If the fluid smells like cat piss, start saving your pennies.

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post #8 of 12 Old 10-28-2013, 04:50 PM Thread Starter
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Smells like maybe a slight gasoline smell, but r we talking like a litter box that has been used by a 15 cats and hasn't been changed in a month or a fresh litter box with a small fluffy kitten
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post #9 of 12 Old 10-30-2013, 04:39 PM Thread Starter
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What should I use for decron. Valvoline, Lucas, or Royal P? And what's the difference between decron V & VI?
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post #10 of 12 Old 10-30-2013, 04:58 PM
Ordnance on coordinates

 
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15 kittens.

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