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Thread: Deflection shields (not to protect against the Klingons)

  1. #1
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    Deflection shields (not to protect against the Klingons)

    Due to the recent death of my front driveshaft from the DC joint it has got me thinking that if I were travelling at a higher speed I would be replacing the gearbox as well, I am getting a new shaft made up with a greasable joint however if it happened again there would be nothing stopping the shaft from destroying the gearbox,

    My question

    Would a metal semi circle bolted (either bar or a deflection cone) located around the top of the shaft be enough to deflect a failed shaft into a downwards direction therefore saving the floor, chassis rails and gearbox from damage?

    Of course not touching the balanced shaft but there incase of it's failure.

  2. #2
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    Most of the racing crowd use a yoke of one sort or another around the tail shaft in case of failure.
    It should be feasible, taking note of the clearance needed for extreme articulation.

  3. #3
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    The commercial Chev Ute - [like the Suburban, but the poverty pack that was used for ambulances a few years ago], had a section of flat steel about 2cm wide bolted under the body, acting as a yoke around the tail shaft - in case it broke at the diff end.

    The flat U shaped yoke had a bolt on each end securing it, so if it was knocked, it could swing / pivot on those bolts without damaging anything. I suppose you could do a similar thing & invert it so it stops the gearbox end of the shaft flicking up.

  4. #4
    lokka Guest
    Yep cant see why a tail shaft loop style thinomagig couldent be fasioned up to save the slush box from damage

  5. #5
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    Quote Originally Posted by lokka View Post
    Yep cant see why a tail shaft loop style thinomagig couldent be fasioned up to save the slush box from damage
    Cool I might get a couple of pairs of steel undies at the same time. (whilst the welder is out)

  6. #6
    lokka Guest
    Quote Originally Posted by dobbo View Post
    Cool I might get a couple of pairs of steel undies at the same time. (whilst the welder is out)
    Yep can be arranged

  7. #7
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    check out some japanese light trucks with the extension drive shafts ( long trays) they usually have them as standard,
    there was a mob in that advertised them in one of the off road mags a few years ago.

    remember years ago reading of a horrifying front uni failure in a holden out west, dropped the driveshaft, it dug into the dirt and flipped the car, they all died of course.


    john

  8. #8
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    Did this some years ago. Was underneath the 2A & thought, "Wtf if the front joint on the rear shaft lets go?"

    A bit of 1/2 steel rod with some flats welded to the end & bolted up, I had a mod that wouldn't allow it to drop onto the road & do a "leap frog".

    Never used but good insurance.

  9. #9
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    I agree, we use loops/bands of steel around tractor PTO shafts in case of failure, these can have quite a bit more momentum than a prop shaft. Only ever had one shaft fail, and the loop stopped it from futher damageing the implement and tractor.
    Pretty easy to put together, a piece of rod or flat bent to a circle and secured properly will do the trick.

  10. #10
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    Quote Originally Posted by JohnE View Post
    remember years ago reading of a horrifying front uni failure in a holden out west, dropped the driveshaft, it dug into the dirt and flipped the car, they all died of course.


    john
    This happened to my brother-in-law in a hilux at 100k on the freeway into sydney. Flipped the lux. No one was seriously hurt and Toyota accepted the problem as a warranty claim and paid out.
    '95 110 300TDI, F&R ARB Lockers, Twine Shower, Aux Sill Tank, Snorkel, Cargo barrier, 9 seats, swingaway wheel carrier, MadMan EMS2
    '85 110 Isuzu NA 4BE1 3.6l Diesel, 0.996 LT-95, Rear Maxi (SOLD)
    '76 SIII 109" Nissan ED33 5-SP Nissan GBox (SOLD)

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