Offroad trailer suspension

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Re: Offroad trailer suspension

Postby Dave Nathanson » Fri Mar 10, 2017 6:48 pm

Here are 3 photos all showing pretty much the same view; the inside of the drivers side trailer wheel. The important differences are that the first photo is with leaf springs, then second with the Timbren axle-less suspension with Straight spindle, and the 3rd photo is the same Timbren except with the 4" lift spindle.

Leaf straight axle IMG_7994.jpg
Leaf Springs & straight axle
Leaf straight axle IMG_7994.jpg (109.43 KiB) Viewed 1102 times

Timbren straight spindle IMG_9217.jpg
Timbren Axle-less with straight spindle
Timbren straight spindle IMG_9217.jpg (81.01 KiB) Viewed 1102 times

Timbren 4Lift spindle IMG_9342.jpg
Timbren Axle-less with 4" lift spindle
Timbren 4Lift spindle IMG_9342.jpg (74.88 KiB) Viewed 1102 times
Last edited by Dave Nathanson on Fri Mar 10, 2017 7:22 pm, edited 1 time in total.
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Re: Offroad trailer suspension

Postby Dave Nathanson » Fri Mar 10, 2017 6:58 pm

Here are photos of the Timbren straight spindle and the Timbren 4" lift spindle. Both are the heavy duty 3500# models. Both of these are right-side-up. They bolt onto the top of the suspension arm. So the flat side of the spindle mount does face down. I will mention that I'm impressed with the sturdy construction of the Timbren suspension.

Timbren straight spindle IMG_8117.jpg
Timbren Straight spindle
Timbren straight spindle IMG_8117.jpg (134.63 KiB) Viewed 1101 times

Timbren 4Lift spindle IMG_9215.jpg
Timbren 4 inch lift spindle
Timbren 4Lift spindle IMG_9215.jpg (79.95 KiB) Viewed 1101 times
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Re: Offroad trailer suspension

Postby Dave Nathanson » Fri Mar 10, 2017 7:21 pm

More Timbren details... Yes, there is a crossbar to connect & strengthen the two side suspension pieces. Timbren says this bar is optional, but I definitely wanted it. It is a 2" square tube, bolted in at each end.
Before installing the Timbren suspension we welded on a 5 inch by 1/4 inch plate from tip to tip along each side. That might be overkill for most people, but I've torn this frame before, so I knew some reinforcement would be very helpful. Actually we had to remove some of the previous angle iron reinforcement so we could add this reinforcing plate. The secured reinforcing plate also makes it less likely that the suspension can twist in or out.
Timbren crossbar & plate IMG_9341.jpg
Timbren crossbar & plate IMG_9341.jpg (186.11 KiB) Viewed 1094 times

Here is the end of that crossbar (driver's side). Timbren recommends bolting and welding it in, but that would make it very difficult to repair on the trail... As you can see, when my TD is connected to the Jeep, the lower edge of the trim is about 20" high just forward of the wheel. (ok, it is 19 7/8) Slightly lower in back, at 18.75".
Timbren crossbar end-measuring IMG_9336.jpg
Timbren crossbar end-measuring IMG_9336.jpg (53.41 KiB) Viewed 1085 times
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Re: Offroad trailer suspension

Postby Dave Nathanson » Fri Mar 10, 2017 8:06 pm

For those who may still be wondering about the difference between the Timbren straight spindle & the 4" lift spindle, here are two photos. Same trailer, same driver's side trailer wheel, same suspension, but different spindle.
Timbren straight spindle from rear IMG_9254.jpg
Timbren straight spindle from rear IMG_9254.jpg (77.03 KiB) Viewed 1066 times
Timbren 4 lift spindle from rear IMG_9346.jpg
Timbren 4 lift spindle from rear IMG_9346.jpg (90.49 KiB) Viewed 1066 times
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Re: Offroad trailer suspension

Postby working on it » Sat Mar 11, 2017 12:11 am

Dave Nathanson wrote:...Before installing the Timbren suspension we welded on a 5 inch by 1/4 inch plate from tip to tip along each side. That might be overkill for most people, but I've torn this frame before, so I knew some reinforcement would be very helpful. Actually we had to remove some of the previous angle iron reinforcement so we could add this reinforcing plate. The secured reinforcing plate also makes it less likely that the suspension can twist in or out.
The attachment Timbren crossbar & plate IMG_9341.jpg is no longer available
....
I've torn my frame, too, ripping a hanger off the frame. Because of that, when I was going to fix it, I added a 2"x2"x 36" long, 1/4" thick angle (with spring hangers welded - and bolted) to the frame, and a corresponding length of 2" tall 3/16" thick steel to form a "sandwich" around the original frame. It has stood up to an airborne trip over a massive pothole at 75 mph, without any ill effects. I'm sure that the reinforcement resisted a landing force that would've torn/bent my un-reinforced original frame. Not overkill, but thinking ahead.
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torquing of hanger assembly (theory).png
torquing of hanger assembly (theory).png (129.98 KiB) Viewed 1034 times
frame reinforcement &  spring hanger assembly installed.jpg
frame reinforcement & spring hanger assembly installed.jpg (93.55 KiB) Viewed 1034 times
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Re: Offroad trailer suspension

Postby drewh1 » Mon Nov 27, 2017 7:05 pm

IMG_0958.JPG
IMG_0958.JPG (20.38 KiB) Viewed 544 times
Dave Nathanson wrote:Here are 3 photos all showing pretty much the same view; the inside of the drivers side trailer wheel. The important differences are that the first photo is with leaf springs, then second with the Timbren axle-less suspension with Straight spindle, and the 3rd photo is the same Timbren except with the 4" lift spindle.

The attachment Leaf straight axle IMG_7994.jpg is no longer available

The attachment Timbren straight spindle IMG_9217.jpg is no longer available

The attachment Timbren 4Lift spindle IMG_9342.jpg is no longer available



Dave - just wanted to thank you for these posts. I ordered the Timbren with the 4" lift after reading your post. I haven't mounted the wheels yet (waiting on hubs) but it looks like I will have plenty of ground clearance when done.
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Re: Offroad trailer suspension

Postby Dave Nathanson » Mon Nov 27, 2017 7:59 pm

drewh1 wrote:Dave - just wanted to thank you for these posts. I ordered the Timbren with the 4" lift after reading your post. I haven't mounted the wheels yet (waiting on hubs) but it looks like I will have plenty of ground clearance when done.


Right on. Let us know how it goes for you. I had a hard time getting the right info, but together, we can get it all figured out for the next guy! :-)
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Re: Offroad trailer suspension

Postby drewh1 » Wed Dec 20, 2017 6:24 pm

IMG_0963.JPG
IMG_0963.JPG (18.31 KiB) Viewed 325 times
well it is not a great photo but this is it - 18" of ground clearance, I had to turn over the trailer hitch to raise it up and replace my wheel/jack as it was no longer long enough. So even with the 14" wheels and tires, I still have more clearance than the FJ.

I only drove it around the neighborhood but noticed it felt very solid and did not rattle over bumps at all. Can't wait to try it off-road this spring in Oregon.
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Re: Offroad trailer suspension

Postby slowcowboy » Fri Dec 22, 2017 8:06 am

I really enjoyed this tread lots of good info. I am happy with my leaf springs and gas shocks since I am a mild off roader in the local wind river moutains here in Wyoming. but it might be a good option choice for a four wheeler trailer. you can get way more off road with them to dump atvs for trips in to the woods. I think from your photos you need a good trailer frame which I don't have and I think its over kill for my travels but I like the idea a lot big time. I got a new kampmaster I am building with a better frame than the harbor freight one on my old tear. its a thought idea for the future. I like it. slow
Plans. there was supposed to be plans to be followed when I built this thing. Opps! AH, gee, tum,tee tum. I think I forgot about the plans 2 years ago. ------Tow vehicles, 1995 ford explore, 1994 ford ranger, 1993 ford F-150, 2009 4x9 Off road teardrop, on harbor freight greatly modified frame.
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Re: Offroad trailer suspension

Postby drewh1 » Sat Dec 23, 2017 12:42 pm

slowcowboy wrote:I really enjoyed this tread lots of good info. I am happy with my leaf springs and gas shocks since I am a mild off roader in the local wind river moutains here in Wyoming. but it might be a good option choice for a four wheeler trailer. you can get way more off road with them to dump atvs for trips in to the woods. I think from your photos you need a good trailer frame which I don't have and I think its over kill for my travels but I like the idea a lot big time. I got a new kampmaster I am building with a better frame than the harbor freight one on my old tear. its a thought idea for the future. I like it. slow


Well the gas shocks have to be a big help. As far as the actual trailer goes, I imagine I will be doing some welding on mine as time goes by. It is definitely not beefy enough for constant heavy off-roading but so far it is holding up. Nice thing about metal is you can always weld more on to it :lol:

BTW, that is a beautiful spot you travel in, Love Wyoming and always wanted to have that license plate on my trailer.
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