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Blew my driveshaft

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Old 01-18-2013, 03:14 AM
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Be thankful for the factory driveshaft loop
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Old 01-18-2013, 05:35 AM
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^^

Also be thankful it didnt disconnect from the diffrential end.
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Old 01-19-2013, 10:04 AM
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Originally Posted by DocS2000
Originally Posted by Andersonracing' timestamp='1358480062' post='22274684
Wow, you really lucked out. usually when that happens the drive shaft goes thrashing through the undercarrage tearing apart the tail housing of the trans and any wiring in its way!

Notice that it broke on the transmission side of things, so it would not thrash around too much before he had a chance to react to the noise.

My diagnosis is improperly torqued bolts. one of them was likely cross-threaded a bit and that caused a moderate rotational interia to develop into more and more movement. eventually, spinning that fast things go snap.

Strange for an S2000, but common with GM muscle cars, that why they require a drive shaft loop for cars on the track.
I lucked out in the sense that it happened at sub 5mph. Wasn't going too fast. I can say that there is a chance the bolts were improperly torqued. What is the correct/safe torque?


Originally Posted by realblag
Originally Posted by ipopvtec' timestamp='1358470801' post='22274423
What could have happened? Looks like it disconnected/broke/snapped. Hopefully no bolts broke in the transmission side. Last time the shaft was off was when I did my clutch (March). Since then I drove almost 7,000 miles... HARD. NJ to North Carolina tore up the dragon for a weekend (April) and it broke in November... Never felt a problem till then. I make 200hp to the wheels.
Your bolts were improperly torqued and/or you had damaged threads in the output flange from when the clutch job was done. It went 7000 miles because bolts are not gonna back out right away. It needed enough vibration for a long enough period of time to get things to that point. The driveshaft has to pull back about 10mm just to get the end of it out of the inside of the flange. Looks like your gonna have to replace the output flange and of course the bolts. You might need a propeller shaft (drive shaft), too. It seems to have flung a lot of the grease out of the cv-joint in that end.
Where can I buy the output flange? and how difficult is it to replace? I already bought an aluminum prop shaft from "the driveshaft shop" with stronger u-joints and the ap1 conversion kit. Where would i find new/proper bolts and such. Although used bolts were supplied, I don't really want to reuse anything.

Originally Posted by Billman250
Undertightened bolts. Guaranteed. They have been working themselves loose in very small increments for quite some time.

Originally Posted by Billman250
Be thankful for the factory driveshaft loop
I am thankful for the loop. See my replies above
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Old 01-19-2013, 05:33 PM
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Who changed the clutch? Either the nuts were not tight or the bolts were not the correct grade.

Utah
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Old 01-20-2013, 07:25 AM
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Originally Posted by Utah S2K
Who changed the clutch? Either the nuts were not tight or the bolts were not the correct grade.

Utah
I did
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Old 01-21-2013, 10:41 AM
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Originally Posted by ipopvtec
Originally Posted by Utah S2K' timestamp='1358649213' post='22278464
Who changed the clutch? Either the nuts were not tight or the bolts were not the correct grade.

Utah
I did
Can't go after anyone for damages then. Thankfully the parts you are looking for is not that expensive. New companion flange (with accompanying nuts, bolts, and ext) on the transmission side and a new drive shaft. You're good to go. Very lucky it wasn't on the diff side.
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Old 01-25-2013, 05:49 AM
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Originally Posted by CrAzYNeSs
Originally Posted by ipopvtec' timestamp='1358699155' post='22279074
[quote name='Utah S2K' timestamp='1358649213' post='22278464']
Who changed the clutch? Either the nuts were not tight or the bolts were not the correct grade.

Utah
I did
Can't go after anyone for damages then. Thankfully the parts you are looking for is not that expensive. New companion flange (with accompanying nuts, bolts, and ext) on the transmission side and a new drive shaft. You're good to go. Very lucky it wasn't on the diff side.
[/quote]


bought a new flange just to be safe
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Old 02-15-2013, 01:31 PM
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Sorry for thread jacking but can anyone point me to a DIY propeller shaft? Mine has been ticking for over a year now.. it magically went away and now it's back.
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Old 02-15-2013, 03:32 PM
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the bolt torque spec is 24 ft lbs, so they don't use very much torque
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Old 07-19-2015, 04:43 AM
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Reviving this, what size and torque is the nut on the out put shaft
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