1 piece driveshaft pros cons
Sep. 23, 2024
1 piece driveshaft pros cons
If you go with a one-piece, make sure you pick a shop that can spin it to rpm. Some shops only balance them at rpm, and that won't cut it. The prior owner of my truck put the one piece on. When I bought it, it still had vibes at 75 to 80mph. I took the shaft in to a good shop here, and they basically ended up re-building it. Now it's smooth. Because the shaft is so long, it has to be larger in diameter. I think mine is 4" in diameter. That's a safety concern, so make sure the shop knows what its doing. FYI, to rebuild my single piece shaft cost about $180 (two new u joints, rebalance, re-weld endcap, repaint) and only took 24 hours. (I was shocked at how cheap that was, but that shop was good. Probably had 10 people working there doing nothing but driveshafts.)
But I wish I had the double cardan setup. It's "more" stock, so it hurts resale value less. Overall it's probably lighter, and gives a little better ground clearance. If you go double cardan, you should get spring shims and tilt the diff up, so the shaft to diff angle is only about 1 degree. The older forerunners and maybe tacoma's used a double cardan shaft. Some people have found those and rebuilt them to save some money. But the shop could also convert your existing shaft.Click to expand...
1 pc. drive shaft for man.trans. pros and cons
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DriveshaftshopOriginally Posted by
I kinda disagree with this information. Almost all new Pick Up Trucks use a long single 5" aluminum shaft there very thin and need to be upgraded when adding HP, we actually did George Kook JR's (Kook's Headers) Supercharged F150 during the week, Truck is a double cab short bed with a 70" long single shaft (allot of fun to drive) We made a 5x.125 wall monster so it can be run on the Dyno and safe from breakage at high speed. There is no real solid reason not to run a single shaft in this car or others. SAE has given parameters on Critical speed-Safe factor speed-shaft design and shaft material and as long as the build falls between these parameters there is no reason not to go with a single shaft. We change tires so the car will handle better, we put more power into the engine so it will move faster, we change clutches and suspension parts all to make the car better. Engineering wise there is no reason a single shaft can not be used, it adds to the car and does not take away from it. There will always be a Ford VS Chevy type argument as long as we modify our cars so i believe its more of a personal choice, Both Vendors in that argument sell single shafts now.
The line I highlighted in black somewhat contradicts your facts. I mean, is this ultimately an emotional decision one must make, or is there a winner of the two, for our application, particularly on a $ per mod/results ratio?
Question: Has your 1 piece driveshaft design, 100% eliminated the "whip" issue that was known in the past, particularly at high speed? I'd like to bring up Cross-Bone's previous post, where he described that 1-piece driveshafted cars were vibrating at Autobahn speeds.
Question 2: Is a 1-piece driveshaft cheaper to manufacture than I 2-piece? If so, wouldn't all OEM's be running 1 piece designs today?
Question 3: Would a long, high speed luxury car, benefit from less NVH with a 2-piece driveshaft? Or is the 1-Piece design finally at par in this department?
Quote:
MercOriginally Posted by
No con's with the 1 piece shaft that I know of.
Also NVH inherent in some designs.
I hold allegiance to neither side, I'm simply keeping the debate alive with questions that should be asked imho, just a FWIW.The line I highlighted in black somewhat contradicts your facts. I mean, is this ultimately an emotional decision one must make, or is there a winner of the two, for our application, particularly on a $ per mod/results ratio?Question: Has your 1 piece driveshaft design, 100% eliminated the "whip" issue that was known in the past, particularly at high speed? I'd like to bring up Cross-Bone's previous post, where he described that 1-piece driveshafted cars were vibrating at Autobahn speeds.Question 2: Is a 1-piece driveshaft cheaper to manufacture than I 2-piece? If so, wouldn't all OEM's be running 1 piece designs today?Question 3: Would a long, high speed luxury car, benefit from less NVH with a 2-piece driveshaft? Or is the 1-Piece design finally at par in this department?Driveshaft Whip? You never heard of that?Also NVH inherent in some designs.
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