79 trillium 4500 'bucking' - Page 2 - Fiberglass RV
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Old 12-23-2014, 11:28 AM   #21
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Name: Dale
Trailer: Trillium
Saskatchewan
Posts: 80
I pull my 4500 comfortably with a vw jetta, something funny is going on if you're getting that much bucking. I wouldn't jump straight to replacing axles tho, start with the cheap/easy stuff.

I'd go tow vehicle back,
1) is the receiver hitch tight on the tow vehicle? (i used to have one that would move making noises that sounded way worst than they should have)
2) is the ball the right size for the trailer?
3) is the coupler adjusted properly for the ball
4) do you have enough tongue weight? (mine pulls better with a battery and propane tanks mounted)
5) tire pressure? free to check
6) suspension condition
7) Frame condition
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Old 01-25-2015, 09:51 PM   #22
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Name: Claire
Trailer: 1978 Trillium 4500
British Columbia
Posts: 323
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One more point to add to Dales.
8. Is the Ball on tight.

We had a horrible first week towing in the cascades and discovered that our ball was coming loose. Tightened it up and no more bucking!
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Old 01-25-2015, 10:50 PM   #23
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Name: Walter
Trailer: Boler
British Columbia
Posts: 67
79 trillium 4500 'bucking'

Also your Jeep is a unibody. As a result any slop in the connection sounds really loud compared to an older body on frame. I always use a hitch clamp on a unibody.

Also tighten the coupler with the hitch removed from the tow vehicle. Clamp the coupler to the hitch, keep tightening the coupler nut until there is just enough friction on the ball it starts to resisted moving with hand pressure on the hitch. Then try the latch a couple times. If latch isn't working smoothly, very slightly loosen off the nut until the latch works every time. This is the perfect clamping force

But my money is on hitch hight and hitch weight.


Sent remotely
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Old 02-09-2015, 01:17 AM   #24
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Trailer: Trillium 4500 Jubilee 1979
Posts: 56
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My 1979 4500 original axle that was removed had 1200 stamped on it.
I believe the axle was minimal.
Bucking was always a problem; with LOTS of weight forward it lessened.
After installing the Timbren Axle-less Axle we've been on two trips and the trailer is not bucking. First noticed going over a rail track which would have had the trailer airborne before. Potholes did the same. It is safer now and I wish I had thrown out the 36 year old axle when it was "straightened".

This should link to the post.. Offroad best axle?
http://www.fiberglassrv.com/forums/f...xle-67402.html
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Old 02-09-2015, 09:33 AM   #25
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Name: Dave W
Trailer: Trillium 4500 - 1976, 1978, 1979, 1300 - 1977, and a 1973
Alberta
Posts: 6,926
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My 1978 4500 had 2000lbs stamped on it
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