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Old 02-14-2010, 10:42 AM   #15
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1974 31' Sovereign
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 19,569
You have the transmission in tow/haul mode, which does not limit top gears. It only changes the shift points higher. You could well be feeling the torque converter engaging and disengaging, also known as "hunting". Try placing the shift lever in the next position down, usually marked "3", and see if the symptoms persist.

Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
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Old 02-14-2010, 12:13 PM   #16
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Port Orchard , Washington
Join Date: May 2009
Posts: 4,463
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Originally Posted by CanoeStream View Post
.................................................. .............

Michelle? Bent hitch pin? Intentionally bent or due to effects of age & wear? Frank, it is common that the hitch bar fitted into your Expy's receiver has an adjustment to allow about a 15 degree tilt toward the trailer. That is an angle specified by ... morning moment here ... hitch mfgrs? antisway mfgrs?
I think she is talking about the cheap OEM type pins where one end is bent to form a handle and the other end takes a hair cotter pin or something similar. I have had the same experience with them being too small in diameter.


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Old 02-14-2010, 02:15 PM   #17
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2004 25' Safari
N/A , Michigan/Florida
Join Date: May 2008
Posts: 60
Well, after doing some soul searching prompted by your many suggestions, it seems like the problem may be solved.

I made sure all the tires in both the TV and TT were up to spec pressure, I found a few miles of dry, level, smooth road with no traffic. Yes, we have some of those here in FL at this time of the year -- albeit cooler than usual.

First w/o the sway bar I got the rig up to 25 mph and performed, once again, the brake controller (P3) adjustment per mfr instructions. Ran the rig for many miles at the speeds where the problem had shown up and varying the road conditions from smooth to bumpy -- no problem. Repeated the same cycle with the sway bar on -- same results.

Even over bridges with quite bumpy approaches, I could not get a jerk out of the trailer. Unless something else shows up next, I believe I did not do a good job with the initial brake controller adjustment and there may have been some erratic signals being sent to the trailer brakes. I'm happy.

BTW, I'm making a habit of anticipating very tight turns, as well as when backing in and removing the sway bar link altogether.

Again, thank you all for your excellent insights.

2004 25' Safari
2010 4x4 Ford EB Expedition
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