Has anyone ever "opened up" their center crossmember to fit a one piece drive shaft? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Justin Jones · 02-03-2018, 02:40 PM

Quote:

Originally Posted by superhondaz50

5" Dana shaft outta a 2010 RAM 1500. 1350 u joints. Hogged out center, gusseted in the from, used a piece of roll cage bar for the bottom I had leftover from the last cage I built. Solid.

I had a buddy years ago that had a '72 GMC long bed with a stock height with the bottom cut out of his to use a one piece driveshaft. It was like that when he got it. He didn't make any effort to reinforce it either. He dogged the crap out of that truck and I don't think he ever had any ill effects from it.

"Supposedly" the one piece will transfer power a little better to the axle/gears etc.

Richard2112 · 02-03-2018, 04:18 PM

As a rule of thumb, the longer a drive shaft is, the lower it's critical speed. That is, the longer shaft will tend to resonate at a lower speed than a sorter one. The beauty of a two piece is that it is difficult or nearly impossible to reach resonant frequency unless it is out of phase or badly in need of a balance. Resonance in a drive shaft can ruin a lot of things.

02-03-2018, 04:18 PM	#2
Richard2112 Registered User Join Date: Jul 2014 Location: South East Ohio Posts: 644	Re: Has anyone ever "opened up" their center crossmember to fit a one piece drive sha As a rule of thumb, the longer a drive shaft is, the lower it's critical speed. That is, the longer shaft will tend to resonate at a lower speed than a sorter one. The beauty of a two piece is that it is difficult or nearly impossible to reach resonant frequency unless it is out of phase or badly in need of a balance. Resonance in a drive shaft can ruin a lot of things.



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