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What’s left of my input shaft. Pic may be disturbing.


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#1 Blown 346

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Posted 18 May 2018 - 12:42 AM

Finally got my truck back after a month of having the trans built and getting a custom Billet input shaft made. Anywhere the trans builder looked the shafts were rated to 1000HP at the flywheel. My truck makes 1010 on 14 psi. $3,400 later after having the entire trans re done and built for the track, I hope I dont have this issue again.

Snapped clean off without even a burr.

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#2 BigRed06

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Posted 18 May 2018 - 12:56 AM

Thats impressive!
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#3 Blown 346

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Posted 18 May 2018 - 02:08 AM

That wasnt off a launch either.  The truck just hit 3rd gear and about a second later heard a loud snap.    Im worried when it goes to the track and hope the new one doesnt break.


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#4 BigRed06

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Posted 18 May 2018 - 09:23 AM

Hopefully the new one was heat treated to harden it!
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#5 Rholston

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Posted 18 May 2018 - 11:11 AM

Thats actually really impressive to round it out like that and scary at the same time
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#6 matslp488

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Posted 18 May 2018 - 11:21 AM

Dang! You got a beast of a truck!
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#7 PaulitoIntimidatorSS

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Posted 18 May 2018 - 02:24 PM

Holy crap!!!!! that looks like it was rounded off on purpose lol. Best of luck with the new one, should have had two made since its custom just in case.


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#8 Blown 346

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Posted 18 May 2018 - 02:48 PM

I just found one that can handle over 1500HP.  So the truck goes back to the shop for them to install this one instead of the 1000HP one I have now. Pisses me off.  


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#9 someotherguy

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Posted 19 May 2018 - 09:47 AM

I'm no engineer or stress failure analyst or anything of the kind...

 

But it doesn't seem terribly coincidental that it failed where it did.  Maybe it's a weakness inherent in the spot where it's cut down for what, a snap ring, or...?

 

Richard


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06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


#10 Blown 346

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Posted 19 May 2018 - 12:39 PM

This was the stock one,lol.   The builder who said he built the trans (I wont say names as he is known here) the old owner spent $5,000 on it to have the best of the best and he only got a shift kit put into it.   

 

Input shafts almost always break at this point due to where the pump and convertor meet.


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