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#1 |
Registered User
Join Date: May 2013
Location: Mooresville, NC
Posts: 12
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Under instead of over the rear end
So I see that everybody raises the rear frame rails over the rear end to get low. Why does no one ever go under? Then you always have unlimited down. Only a limit on the up.
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#2 |
Registered User
Join Date: May 2013
Location: Scottsdale, Az
Posts: 245
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Re: Under instead of over the rear end
That sounds like a lot of work when building bridge is easier, instead finding the right levers or trailing arms to work right
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#3 |
Registered User
Join Date: May 2013
Location: Mooresville, NC
Posts: 12
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Re: Under instead of over the rear end
I don't really see how anything changes. Other than the route the rail takes. Without a bridge you don't have to adjust the bed other than for the housing.
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#4 |
Registered User
![]() Join Date: May 2012
Location: Scarborough ME.
Posts: 413
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Re: Under instead of over the rear end
You still need something up there or built up from the frame to mount the top of the shocks, upper spring seats, and all the structure for the bed floor mounts to, so it doesn't seem like it would be easier or lighter anyway. I used to run an under slung frame on my circle track car but you still had the rear cage tubing to mount the coilovers etc from. To me for a regular truck the over the top seems simpler.
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1962 Impala SS 383 stroker Tremec TKO 600 Black 1965 SWB BBW Fleetside Custom Cab PB Coilover setup Black 2003 100th Anniversary Road King Classic Silver Black |
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#5 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,626
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Re: Under instead of over the rear end
It can be done but the scrub height gets too low. In order to have clearance for movement of the axle downward (you need about 4" from frame to axle tube) the frame bottom would be below the bottom of the wheel rim. If you're building a donk with 26" rims it might work.
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#6 |
Registered User
Join Date: Dec 2012
Location: Woolwich Twp, NJ
Posts: 445
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Re: Under instead of over the rear end
I was thinking the same thing - the travel would be such that anytime you hit a pothole or speed bump you would have some serious issues - my development has these Belgian block curbing at the street and if I couldn't air up I would be picking up pieces.
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64 Step Side - The Mistress |
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#7 |
Registered User
Join Date: Jan 2009
Location: houston
Posts: 196
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Re: Under instead of over the rear end
People have done it. It's called under-slung. What happens if you're running big wheels and have a flat? Axle hits the frame before it untucked to get it off. No thank you.
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