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Steel 2 piece driveshaft conversion for crew cab

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Old 12-27-2017, 01:13 PM
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Are the 14+ truck driveshafts that weak ?
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Old 12-27-2017, 01:44 PM
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Originally Posted by MrJimi1121
Are the 14+ truck driveshafts that weak ?
Yes. And sometimes they show up from the factory not true
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Old 12-29-2017, 02:49 PM
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I have a 5" .120 wall 6061 T-6 aluminum with a Sonnax billet yoke. 135mph plus for a good stretch and no issues. It mostly comes down to the speed that the drive shaft is spinning that makes them come apart. Driveshaft Specialist in San Antonio made mine. They said I would break the diff before I broke the drive shaft.
Attached Thumbnails Steel 2 piece driveshaft conversion for crew cab-img_1775%5B1%5D.jpg   Steel 2 piece driveshaft conversion for crew cab-img_1776%5B1%5D.jpg  
Last edited by Slapps74; 12-31-2017 at 12:39 AM.
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Old 12-29-2017, 03:55 PM
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Originally Posted by Slapps74
I have a 5" .120 wall 6061 T-6 aluminum with a Sonnax billet yoke. 135mph plus for a good stretch and no issues. It mostly comes down to the speed that the drive shaft is spinning that makes them come apart. Driveshaft Specialist in San Antonio made mine. They said I would brake the diff before I broke the drive shaft.

Yours a crew cab? What was the cost of it?
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Old 12-29-2017, 07:37 PM
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Originally Posted by 91LT16SpeedFormula
Yours a crew cab? What was the cost of it?
Negative RCSB and it was 6 or 7 hundred. I don’t remember.
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Old 12-31-2017, 12:20 PM
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Yup driveshaft specialist built mine as well and no problems 5" .120 wall same as Slapps74. The problem with the CC and EC trucks is the length of the shaft, its just too damn long. Your best bet is a two piece shaft and making a crossmeber for it while getting the correct driveline anlges. Weve done several trucks and we can go 130+ with not a single issue.
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Old 12-31-2017, 09:52 PM
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Originally Posted by Slapps74
I have a 5" .120 wall 6061 T-6 aluminum with a Sonnax billet yoke. 135mph plus for a good stretch and no issues. It mostly comes down to the speed that the drive shaft is spinning that makes them come apart. Driveshaft Specialist in San Antonio made mine. They said I would break the diff before I broke the drive shaft.
I need to do the same. I have to already get the driveshaft shortneded so I might as well have a new one built
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