Author Topic: Altered driveline cover requirements.  (Read 2989 times)

Offline BK

  • Full Member
  • ***
  • Posts: 248
    • View Profile
  • Your Best Time: 8.45 / 5.30
  • Your Track: Empire Dagway
  • Your Vehicle: Late 70's FED
Altered driveline cover requirements.
« on: January 27, 2016, 03:09:06 PM »
The link below should take you to the IHRA rulebook. Page 76 has the driveline requirement. I cant tell if it's saying I need to cover the entire driveshaft or just the u,joints.
The car is an Altered with suspension so the u,joints are required.
I'm not overly concerned about the shaft as it's pretty much overkill for my application, but still want to fit the rules and be safe.{"issue_id":285638,"page":76}

Offline Roger

  • Full Member
  • ***
  • Posts: 164
    • View Profile
  • Your Vehicle: 185 inch FED
Re: Altered driveline cover requirements.
« Reply #1 on: January 31, 2016, 05:52:26 PM »
The rule states that if you sit over or in back of the rear end section, then you must have .120” min. steel plate securely mounted to the rear end center section if you use universal joints.

Just bought an altered last week with a 4 link rear. When sitting in my car I sit in front of the rear end, not over it or behind it. The back of the roll cage shoulder hoop is about plumb with the u-joint on the rear end but my butt is well in front of the rear end so it appears this rule wouldn’t require any steel plate. If yours is like this then it doesn’t appear to be required. There is a drive shaft loop directly below the front of the seat in my car and another about 10” towards the rear along with a 3" wide piece of .120" steel attached between the two that won’t allow a loose shaft to come up and bite me in the ass. The setup has repeatedly passed tech at many national NHRA events though I don’t know if the car ever went through IHRA tech.

 Besides, the paragraph from the rule book appears to be talking about the preferred use of couplers instead of a driveshaft with a solid mounted rear end; couldn’t use a coupler instead of a driveshaft in our case. And there’s the driveshaft loop for the front of the driveshaft installed within 6” of the front u-joint.

Now if you’re sitting over the rear in your car then you might want to contact an IHRA tech person or an experienced chassis craftsman just to be safe. Myself, I want to keep all the parts I was born with in one piece cause I’m kinda attached to them so I’ll error on the side of safety. There’s two reasons my car is going to the chassis shop; making a few modifications to the car and letting the expert look for and fix any problems or concerns. Safety first.


  • Full Member
  • ***
  • Posts: 173
    • View Profile
  • Your Best Time: 8.28@168 door; 9.00@147 6-cyl alt; 8.53@160 RED
  • Your Engine: 300 Ford six NA w/ crossflow and prod. heads
  • Your Track: Milan, Thompson
  • Your Vehicle: Advanced Chassis altered , The Last Logghe altered, '30 RPU
  • General Location: North Coast
Re: Altered driveline cover requirements.
« Reply #2 on: January 13, 2017, 06:31:22 PM »
I had an aluminum driveshaft come apart. Blew apart like a hot weenie. Boy howdy I was glad that driveshaft guard did its job as I thumped to a stop.