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C6 tail shaft housing

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Post  Dave De April 19th 2015, 9:38 am

At the track leaving off the brake I broke the front yoke ears off and cracked the tail shaft around the case flange. Im thinking that the 1330 size u joint yoke failed first but the tail shaft housing carnage is severe. The housing is the 14 inch long part and Im moving up to an aluminum shaft with 1350 joints.
Is there a better tailshaft housing or is this normal to take the housing out from the yoke failing?
Power is at 900hp level, car weight is 3150. Converter stall at 4600 with the car leaving at 4000. Driveshaft angles are at 2 degrees.
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Post  Frank Merkl April 19th 2015, 12:18 pm

if the front ujoint fails it's going to break the housing
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Post  Dave De April 19th 2015, 1:16 pm

Thanks Frank
That information is good to know. Is there anything I should look for before I throw another housing at it?
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Post  maverick April 19th 2015, 1:26 pm

I'd say you already have with the shaft & yoke upgrades.

BTW, you suffered much less carnage than I did with a similar failure. Cool
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Post  bbf-falcon April 19th 2015, 2:31 pm

WHY was you using 1330 joints w/900hp?

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Post  Dave De April 19th 2015, 4:03 pm

bbf-falcon wrote:WHY was you using 1330 joints w/900hp?
Living on the edge I guess.....
Kinda stupid
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Post  Frank Merkl April 20th 2015, 12:03 am

I'm not that keen on an aluminum driveshaft but if the manufacture say you'll be good, go with it ! 1330 ujoints were your prblem !
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Post  DILLIGASDAVE April 20th 2015, 8:57 am

Dave De wrote:..............Driveshaft angles are at 2 degrees.

Is that 2.0* driveline profile a street-highway/street-strip "equal but apposing" profile (like having slip yoke C/L to driveshaft C/L = +2.00* & driveshaft C/L to pinion C/L = -2.00*)? Or is it a drag only "point crank directly at pinion" profile (slip yoke C/L to driveshaft C/L = 0.00* & driveshaft C/L to pinion C/L = -2.0*)? Or is it some other angle combination?

If it's a ladder bar or 4-link car with coilovers & using the "drag only" driveline profile, IMO the rear driveshaft to pinion -2.00* U-joint operating angle (pinion angle) is a little too much if combined with a 0.00* front U-joint operating angle.

If it's the "equal but apposing" street-highway/street-strip driveline profile, (front +2.00* & rear -2.00*) on a ladder bar or 4-link setup it's probably a little high but could be OK. But in this situation there's not much you can really do, if you change the pinion angle without also changing the slip yoke angle the driveline angles are no longer "equal but apposing".
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