Tranny or Engine problem? No power pulling out from stop randomly. - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 07-02-2010, 05:11 AM Thread Starter
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Tranny or Engine problem? No power pulling out from stop randomly.

2004 F350 Dually 6.0

Randomly our Dually will fall on it's face pulling out from a stop. This happens sometimes when empty, and sometimes with a loaded trailer. It feels like no matter how hard you push the pedal it's not accelerating at all. It may take 200 feet, or a 1/4 mile and then take off like a rocket. Switching between tow/hall, and or shifting from drive,down to 1 does nothing. This has been happening off an on for quite a while, in both winter and summer. And when the truck is first started in the morning, and in the afternoon while the temps are up. It's like it's stuck in 3rd gear or something.

Is that a common problem? I've heard of trannys not upshifting when there is an issue, but not them being stuck in a high gear from a stop.
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post #2 of 5 Old 07-02-2010, 05:51 AM
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Sounds like your torque converter isn't locking.

Shawn Carlson
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post #3 of 5 Old 07-02-2010, 06:03 AM
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My '06 F350 SRW used to do the same thing, never did figure out why.
Your right it feels like it's starting out in a higher gear, but could also be the turbo vanes are stuck in the open position causing the turbo to spool up very slow.

2006 F-450 XLT 4x4 Auto 4.30L Alcoa 19.5" 16,000 GVWR
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post #4 of 5 Old 07-02-2010, 06:07 AM
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Quote:
Originally Posted by Evil Eye View Post
Sounds like your torque converter isn't locking.
Torque converter should not lock up until trans has shifted into the higher gears... it would never be locked up when starting out from a stop.

2006 F-450 XLT 4x4 Auto 4.30L Alcoa 19.5" 16,000 GVWR
Kelderman 4-Link/4-Bag Rear Suspension, Lariat Seats, '08 Console, '11 Mirrors, CTS, SCT X3
ARP's w/OEM HG, BPD 6ph FICM @ 58v, BPD Oil Cooler w/stat, Ported Intake, 185 amp Alt
P-Max w/WPE billet wheel, Spearco IC, 4" Banks Exhaust, Shell T6, Zerex EC-1, Oil bypass filter

49,000 miles
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post #5 of 5 Old 07-02-2010, 06:38 AM Thread Starter
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OK, I was originally thinking the vanes sticking also. Is there a way to test the controller? The turbo was replaced a year ago, so I'd hope they weren't gummed up yet. It seems as though I should have some power even if the vanes are sticking correct? I'd think even with zero boost I'd still be able to pull out faster than a few miles per hour.

As for the torque converter....

Is it possible that it is locking up in first gear, and not letting the engine build enough rpm?
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