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Rear trailing arms "Cranked"


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They don't.

I'm sure they're well made, Gwyn is known for his stuff being of good quality (better than his spelling anyhow :P), but there would be little or no advantage to installing those ones over the stock arms if you're staying at standard height.

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The basic thing to look at is the angle of the trailing arm vs the bushing mounting bracket surface. If it is parallel then you don't need any cranking, if it is under tension then you want as much 'crank' as returns the arm to parallel. My gut feeling is that the stock height arms could do with some cranking but cost means they're straight as this is the strongest configuration with the least weight.

Now for 'need' it is more and more needed as you lift since the pressure on the bushing in one direction while sitting at static resting height puts strain and causes extra wear. The 'correct' fix is to have something like X-Arms or Rose-jointed arms which eliminate the bushing pre-load by their design.

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Above sounds bob-on from what I see. Especially about standard needing a slight crank.

But it depends where in the standard axel movement you run. My 'coiler' runs quite high, so my bushes are stretched all the time.

I run standard soft rubber bushes to get flex. Which also reduce shock loadings.

Cranked will help the axel drop fully at one end, as long as the other side isnt bound-up by the chassis bush, which has to flex more on full compression. Do you even reach the bumpstop now when cross axeled?

Still a good product if you are going to stand the truck on them over a log, or drive like a crazy person :)

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its pretty much only alrc affiliated clubs that 'shouldn't' allow cranked arms . In standard class anyway. . . I have cranked arms for strength, however, as they are made for lifted trucks they tend to be a tad longer than stock, to retain diff angle. . . So my trailing arm bushes are in front of the chassis to get that right! . .

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Hants and berks dont allow cranked arms, neither do a few other clubs. In the "alrc" as you have said, but we did a friendly trail a month or two back and run are trucks with so many no nos lol I think i failed on something like 6 things

B.9.6. Any radius arms that have been welded to, drilled or cut into, deliberately notched or bent up/down/sideways are prohibited. Plus C.5.5.

The only club that i know of that allows arms and so on is AWDC which has millions of class's but they seem to run under there own book

Just worth a thought if you ever wish to try trailing propley, that some places might not like the cranked arms

Daniel

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No clubs in The Bahamas. I just want to make her as bush worthy as possible.

I was told that with +2 shocks and relocators the cranked trailing arms would help with articulation.

kinda makes sence.

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