No reverse under load ????

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Mar 23, 2004 | 10:13 AM

66coupenw

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No reverse under load ????

Got a '03 F350 4X4 6.0 auto CC dually. Sometimes when I'm backing up under load, up a hill and/or with a trailer hitched up, reverse doesn't seem to have the oomph to move me. I can floor it, but it barely crawls if at all. No problem without a load. I need to bring it into the dealer for some other warranty items and I'll have them check this too, but I figured I'd see if any of you all have experienced this. Any thoughts?

Mar 23, 2004 | 01:39 PM

Hot Spot

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Does the trailer you are backing by chance have surges brakes on it?

Mar 23, 2004 | 05:21 PM

78fordman

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From: Jefferson, Iowa

Could be a blowen seal in the reverse cylender.

Mar 24, 2004 | 07:23 AM

HDMustF250

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From: Middle Geogia

Have you checked the transmission fluid level?

Mar 24, 2004 | 09:09 AM

66coupenw

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Thanks all. Hot Spot: good thought but that ain't it. Trailer brakes definitely aren't energizing. HDMust: tranny fluid's fine.

But ... here's a wild thought! These beast's have antilock brakes, right? Do you suppose something's happening there where wheel skid is being detected in reverse and brakes are applying? It would make sense, as it only happens when trying to back up under load, uphill and/or on a loose surface when one would expect the wheels to slip. Any thoughts on that theory?

Mar 24, 2004 | 09:36 AM

jaygos

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From: Texas

Are you braking when backing up? is your foot on the brake? I don't think Anti lock would be it. I would think a seal in the trany
is out.

Mar 24, 2004 | 04:03 PM

Loyd Lucas

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Rear pump gone?

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Mar 24, 2004 | 09:55 PM

Pony Power

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From: Washington

Had that problem with mine. Can't remember for sure but it was either a blown gasket leaking pressure through to another area or a valve doing that; and the flows canceled out the reverse. I could back up on flat ground but if I had to back up going uphill putting a load on it, I would get about 20 feet before it would lock up.