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Old 09-02-2015, 02:02 PM   #11
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Originally Posted by Duckogram View Post
5.76 is way too low. I just returned from a 10,000 mi trip from S Fla to Coeur d'Alene via NM, Moab, Hells Canyon and back through Glacier, Rocky Mtn and Chicago. I average over 8. I had a CEL come on and fuel econ was dismal like yours but it was a stuck valve in the evap canister. Fixed in TX and mpg back up. I get reasonable economy by driving at 60 - 63 mph, Slow starts, no cruise control unless on flat roads with favorable winds and no tow/haul (yes I tow).
The tow haul mode programming disables O/D.

There is another thread in this section where tuners are being discussed. All evidence indicates that a tuner will help you with your concern (which I share).

Spent a couple of weeks in your Ainsworth State Park last year. Loved it!
What is a CEL?... is that a check engine light? I've only driven this thing 300 miles over the 2 1/2 months we've had it... we live in the Willamette Valley and it's in between (2) mountain ranges... the Cascade Range and the Coast Range... both have twisty and windy roads that go over each... so I can understand my poor mileage a little bit. Next spring we'll run this thing down to California and hit some flat roads.
Though you did have a bunch of mountains to go over too, I hope I can get better than that 5.7 that I pulled.
Ainsworth State Park is nice... The Columbia Gorge has a lot to offer... lots to do!
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Old 09-02-2015, 04:05 PM   #12
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If you ask your Ford dealer to run Oasis on your VIN to see if there is an update for the PCM concerning shifting issues. Also invest in a Scan Tool, you can a retrieve and clear(if you wish) any trouble codes that are stored in the PCM. And finally, the Tow/Haul mode just changes the shift points, the trans still uses OD!
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Old 09-02-2015, 04:26 PM   #13
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Originally Posted by twojump36 View Post
What is a CEL?... is that a check engine light? I've only driven this thing 300 miles over the 2 1/2 months we've had it... we live in the Willamette Valley and it's in between (2) mountain ranges... the Cascade Range and the Coast Range... both have twisty and windy roads that go over each... so I can understand my poor mileage a little bit. Next spring we'll run this thing down to California and hit some flat roads.
Though you did have a bunch of mountains to go over too, I hope I can get better than that 5.7 that I pulled.
Ainsworth State Park is nice... The Columbia Gorge has a lot to offer... lots to do!
Yes, check engine light (actually it reads service engine soon for the codes I had)
As for the O/D issue, anyone who has a F-53 that has tried it and can confirm that the trans comes out of O/D when you actuate the tow/haul please chime in.
Maybe there is a problem with mine, a change over the years or bad info on the 5star website. I sure would like to know for sure.

Easiest way to check is when in cruise on a flat road without tow haul then push the button and look for rpm increase.

When you head South be sure to bring a fat wallet for fill ups.
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Old 09-02-2015, 05:02 PM   #14
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We do from western panhandle Idaho east over the mountains several times a year. Up to slow, down too fast as the song goes. Several long 6% grades.

Hate the way the engine and transmission are programed so am looking at some of the after market stuff out there, but need to wait as most void the powertrain warranty.

Also on flat lands don't like the up shifts for overpasses.

So keep posting so we can see what others are doing.
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Old 09-02-2015, 05:35 PM   #15
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I'm pretty sure my OD works in Regular D Mode and in Tow / Haul Mode...
I mean I don't really count the gears, but at the same speed (60-65) it seems to do the same RPM's in OD...
I just don't like the shift points getting to high gear... nothing I've driven revs that far except that NASCAR...
once it shifts out of 3rd, it runs great and is very manageable... 1st 3 gears though are crazy.
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Old 09-02-2015, 05:51 PM   #16
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You are all correct.. Our 2014 Sunseeker with the V-10 does not shift until it reaches at or slightly above the 3,000 RPM mark. I think your 2015 will have a 6 speed tranny
Ours has the 5 speed but either way they both work as engineered.


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Old 09-02-2015, 05:53 PM   #17
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Just though that I should mention that I may be confusing terminology between O/D and torque converter lock up. I'll do some homework on that...


Edit: I found this definition on the countywide transmission website. It may not be the gospel but it makes sense;

13. WHAT IS THE DIFFERENCE BETWEEN LOCK-UP AND OVERDRIVE?

Overdrive is a gear ratio inside the transmission of less than 1.00 to 1. For example, .95 to 1 means that, in overdrive, the input shaft turns .95 hundredths of a turn and the output shaft turns one complete turn. In most 2 and 3 speed transmissions, high gear ratio is 1.00 to 1, which is equal speed of input and output shafts. Lock-up is a function of the torque converter only. It means that the driving [or engine-driven] turbine is mechanically locked to the driven [or transmission-driving] turbine by a clutching device. A non-lockup or open converter is one with no such locking device. The driving turbine in this case is always turning faster than the driven turbine, and is thus slipping slightly, and loosing some efficiency and fuel economy, by turning the engine more RPM.
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Old 09-02-2015, 06:22 PM   #18
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You are correct Duckogram. The company I work for built the assembly equipment for the clutch carriers, torque converter, sub and final assembly and test for these transmissions.

As far as I am concerned keeping the torque converter out of lock is preferred when on hilly terrane.
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Old 09-02-2015, 06:49 PM   #19
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I have a Sunseeker 3010ds with the ford v10 for about three years. Most of that time we have had the 5Star tuning tune installed. It eliminates all of the shifting issues discussed. No more screaming trans as it shifts from low gear or down shifting going up a hill.
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Old 09-02-2015, 07:17 PM   #20
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I have a Sunseeker 3010ds with the ford v10 for about three years. Most of that time we have had the 5Star tuning tune installed. It eliminates all of the shifting issues discussed. No more screaming trans as it shifts from low gear or down shifting going up a hill.
Do you have information on this 5 Star Tuner?
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