LEGENDS > Drivetrain & Gearing

Drive Shaft

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art1:
 Was wondering if anyone could share some insight on a wreck I had last week. As I was heading down the straightaway I heard a loud noise come from the rear end of the car and lost control and hit the wall. My question is when I inspected the car the pinion yoke was completely broken at the rear end. Do these break on their own? or did something else cause it to break? The rear end spins freely with no issues.

Thanks,

Art

VMS Motorsports:
Assuming there was other damage...my guess would be that you broke a right side trailing arm bolt, forcing the right rear back, which, can break the yoke, as it would be the next stress point. Noise you heard was  the driveshaft banging around at a few thousand RPM in the tunnel.

Of course this is a guess not knowing any of the other damage. I have never seen a yoke just break by itself without other contributing factors

s10custom:
What Jim said. happened to us last year and cost us a front and rear clip. Added the double shear tabs to the trailing arms to help prevent this.
 

art1:

 I think you are right on the money, went out and checked the RR trailing arm and the bolt was broken where it attaches to the frame. I took a big hit when the car backed into the wall damaging two rims, left rear shock, rear panard bar and suspension parts on the right front. This is the second time this bolt has broken in six races, any idea why it is breaking. All bolts have been grade 8 and the rear end is a double shear.

Thanks for the feedback,

Art

s10custom:
Are the trailing arms double sheared on the chassis also and not just on the rear end?

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