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Since it appears to be Ford month here on Expo?:
The above pic is the approximate section of a 19 Ranger frame where the ZR2 bent, you can see where ford has reinforced the upper and lower sections of their frame with plates, the ranger also has a hole on the inside of the frame with rolled edges. This hole is in the approximate area where the ZR2 bent is in this pic:
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The ZR2 holes (there are two) are smaller than the ranger one but the ranger of course has just the one and the reinforcements. Seems like a silly place to put a hole in the frame.
I poked around a 17 F150 supercab we have at work. It also has two holes in the frame in the same place just aft of a burly looking crossmember. From what I read they’re there to allow the truck when hit from behind to bend upwards and pull the top of the box away from the cab. This is to keep the box from “crimping” the back of the cab and not allowing the back doors to open. That’s the idea anyway, doesn’t always work. Here’s a pic of when it works:
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The Ranger T6 version overseas I don’t think has this hole (I can’t find a close pic) as the upper/lower frame reinforcements are not present. Does anyone have specific information as what’s was changed between the NA ranger and the T6? All I can find is that the frame rails are new and “fully boxed” because “payload”. T6 has similar payload and it’s also fully boxed.
Think these holes are part of Americanizing the Ranger and the GM twins. The Holden/Isuzu Dmax also don’t seem to have these holes.
Holden frame repair plates: no holes.
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And Ranger T6 frame repair plates: also no hole.
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I think Ford knew about the possibly of this happening because as I’ve been reading bending Australian truck chassis’ is common. Ford put the upper and lower reinforcement plates to retain some strength because NA crash standards required them to put a weak spot in what appears to be a critical spot on the frame.
Whether or not GM felt the frame was strong enough in that spot not to require reinforcements is a big question to me.
Anyway here’s a bent T6 ranger based truck. Yeah it’s a Mazda BT-50, I chose this one because it’s a video and the owner is very forthcoming as to what happened.