cubsfanfordman
New Member
There seems to be a lot of similar threads on F150 forum, which give me some ideas but I'm still trying to figure this out, maybe one of you can help. The situation is when I pull a horse trailer (2 separate ones) with 2013 Expedition (tow package, 9200 lbs capacity, 6000 with 600 lb tongue weight if not with weight distribution) i get a shudder at 50-55 mph that feels like I'm on rumble strips. Can't feel it in the steering wheel but feel it in the vehicle, like drivetrain. The trailer I pulled last is a brand new trailer and was empty, so about 2500 lbs. I pulled my boat today, 3500 lbs, with no issue. I think the horse trailer has more tongue weight however than the boat, it's probably approaching 400 empty and the 600 limit with 2 quarter horses in it. The boat is a little lower profile for wind resistance, but I can't believe that matters. The horse trailers pull great once you get to 60 mph. I did have the tow/haul switch on the shifter on, it doesn't help or hurt the issue.
- torque converter - kinda think not because it doesn't do it with the boat. Also doesn't go away when I take foot off gas and tap brakes
- misfire due to coil pack being bad on a cylinder - again, doesn't do it when not towing, or with the boat so I think not
That leaves me with something to do with driveshaft/pinion angle, etc that would be affected by the greater tongue weight of the horse trailer? I would suspect the trailer but its been identical with 2 horse trailers. I see posts about roadmaster active suspension and/or installing air bags. Think that could help?
Also, I've done very little towing in the past, never had transmission fluid changed, now I'm at 60K, should I have it serviced or leave well enough alone.
- torque converter - kinda think not because it doesn't do it with the boat. Also doesn't go away when I take foot off gas and tap brakes
- misfire due to coil pack being bad on a cylinder - again, doesn't do it when not towing, or with the boat so I think not
That leaves me with something to do with driveshaft/pinion angle, etc that would be affected by the greater tongue weight of the horse trailer? I would suspect the trailer but its been identical with 2 horse trailers. I see posts about roadmaster active suspension and/or installing air bags. Think that could help?
Also, I've done very little towing in the past, never had transmission fluid changed, now I'm at 60K, should I have it serviced or leave well enough alone.