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  #11  
Old 10-02-2012, 09:52 PM
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Something ain't right.

Even running w/o mds, it shouldn't have dropped that much if your speed was constant.

I'd say it's time for a visit to the dealer.

The truck in my avatar had 40" tires, almost 500 hp, a 750 cfm carb, no O/D, and I could still get 11-12 on the highway with it.
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Last edited by TRCM; 10-02-2012 at 09:56 PM.
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  #12  
Old 10-03-2012, 08:19 AM
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It's easy to accidentally bump the tranny into a different gear range without even knowing it. Other than that, I don't have any great theories as to why your mileage would drop suddenly.
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  #13  
Old 10-03-2012, 08:36 AM
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Yes well tell you the truth i have accidently done that b4 but i checked while i was still driving to see if i had done that and no it was still in drive.im thinking of filling up the tank and taking a 20 minute drive and see how it goes.
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Old 10-03-2012, 01:18 PM
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Quote:
Originally Posted by molina425 View Post
Yes well tell you the truth i have accidently done that b4 but i checked while i was still driving to see if i had done that and no it was still in drive.im thinking of filling up the tank and taking a 20 minute drive and see how it goes.
Keep us posted!
This has caught my attention
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  #15  
Old 10-03-2012, 01:46 PM
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do you feel like anyting is dragging,... like parking brake or anything else (bad tranny, bad rear diff, bad brake)that would make your truck work hardder
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  #16  
Old 10-08-2012, 08:20 PM
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Sorry guys just got around to driving my truck today.i filled it up and went for an hour n a half drive.everything seemed fine again.my mileage went back to the 19-20 range and sometime down to 16.still wanting to take it to a dealership and have it looked at to be safe n sure.
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