Let’s talk about Trailing arm rear suspensions! On the right 4×4, this offroad suspension style can be a huge asset. Freeing up some space, building a beefy lower link, and using a smaller Coilover are big advantages. BUT there are two sides to this story! I don’t recommend Trailing arms for most offroad builds. They add complication to the initial setup, add weight and even reduce ground clearance. In this video, I want to help give you the basics so you can make a decision that will appropriately suit your project. Enjoy this video! Next week we will get this Landrover Discovery on the trail to test out these new mods. See you then!
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#offroad #4×4
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Can you make a video on air suspension ? How it differs in suspension dynamics than a coil spring
Maaaaaan I’m think the gladiator needs trailing arms too- like the hybrid high clearance kind.
A little bit of math for those who scratched their heads when Nate mentioned "25%":
When you move the spring 25% from the axle, in order to keep the same ride height, the new spring has to be 33% stronger, not 25%. Use the reciprocal fraction: The spring is 3/4 of the distance from the front to the axle, so the spring has to 4/3 times as strong. Same for the shock valving.
The following example includes some rounding to make for fewer fractions…
Using Nate's example, imagine that the arm is 4 feet long. You move the spring so that it is now 3 feet from the front joint and 1 foot from the axle. If it had 400 lbs of force at the axle, then there is 100 lbs per foot of arm length. Now at 3 feet from the front joint, you now need to account for that lost 100 lbs of force. So, divide that by the 3 feet and you get 33 lbs, or 33% more spring force needed, not 25 lbs or 25%.
That shows that the 400-lb spring would need 33% , or 133 lbs, more force, making it a 533-lb spring.
If it had a 300-lb spring, then 33% more would make the new one a 400-lb spring.
No matter what size it was, the new size or spring rate will need to be 33% more.
When I was a kid lots of cars still had the drive shaft in a pipe with a tapered tubular on each side to eep the axle square. A big strong tubular triangle. Studebaker light trucks axles were like that. This is just a modern rendition of that original technique.
eBay has dual duro bushing I been thinking bout using not even use sleeve…. company name is kpreneurethane or polyurethane 4 less and more…
Weird choices
Should do a video on shock placement on a rear axle. Front, rear or 1 front 1rear.
I'm confused. Will that stock airbag work without a coil around it for support? Seems to me that it will need something or it will just bow out to the side.
I have to say nice work I love the disco . I have a D1 and a RRC 2 door . My RRC I think in my mind has the perfect rear suspension because the load leveler in the back upper A frame allows for a lot of axle flex WAY more than a D1 ever had. If your loading up the RRC a lot you can still have a very soft ride and install a Defender 110 load leveler and it will carry a lot more weight . The axles will need to be up graded which is why I have a factory front and rear D60 . With the axle up can get for the D60 axles they can be built up super strong and still fit under a rover with out making a 1ton axle set up . Tony
McMaster carr will have that sleeve materiel
Honestly for the amount of work you do I would say why not buy yourself a small metal lathe. I have one and making those sleeves and simple parts don't take much and you could take tubing you have and resize the inside. Won't be too expensive but will get you off a pinch
Hi Nate, always enjoy your videos. If you still need the sleeves, I can fab them for you for the cost of material and shipping from Mount Vernon, WA.
P.S. when are you going to get more XL t-shirts in?
Excited to see how your experiment turns out for you!
I'm stretching my TJ to LJ length and pushing back my axle. What would you say would be the longest that you would make the control arms?
metal supermarkets for the bushing sleeve
I love your upgrade series on the Disco 2. I own one and love it. If I ever win a lottery, I'll send my Disco to your shop (as a project, I know you are not a garage). Keep up the good work.
Time to buy a Lathe.
What is that clamp setup on your evolution saw?
Try McMaster Carr for the bushing material. They won't be cheap but if they have it you can buy it in various lengths depending on your needs and it ships quickly.
If no where else, McMaster-Carr should have what you need. Kind of expensive though
Go to an Ag store, tractor supply , John Deere, Kubota and ask for bushing sleeves for control on 3 pt hitches.