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Thread: Reverse-torque steer - steering pulls right off-throttle

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    Reverse-torque steer - steering pulls right off-throttle

    Quick question - I’m renting a Lancia Fulvia Zagato in Italy and its developed a problem - it pulls to the right when you come off-throttle. Looks like the CV has thrown a bit of grease in the engine bay as well. No serious noise, steering is fine otherwise. Any ideas what this could be? I haven’t driven it very hard, but hoping I didn’t break something through abuse on tight Italian hairpins...

    PS - the shop is called joeyrent out of Milan. Not quite as cheap as Hertz but they’ve been genuinely good guys so far.

    Thanks!

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    Senior Lancista impaw's Avatar
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    Re: Reverse-torque steer - steering pulls right off-throttle

    My guess would be a worn tie-rod end.
    Cured a similiar issue on my rally car with new tie-rod ends
    1966 Lancia Fulvia "Bella"
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    Re: Reverse-torque steer - steering pulls right off-throttle

    Turns out it’s a broken Cv joint. Cant figure out how I would have broken one without doing something reckless. Are these prone to fail? Anything you can do wrong to wreck it?

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    Legendary Lancista 1,6 HF's Avatar
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    Re: Reverse-torque steer - steering pulls right off-throttle

    It's unlikely you did anything to damage it. More likely the boot has been leaking grease over time.
    Ed Levin
    Fulvia 1,6 HF

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    Legendary Lancista lancialulu's Avatar
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    Re: Reverse-torque steer - steering pulls right off-throttle

    Worn idler box causes most off trottle steering problrms......

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    Re: Reverse-torque steer - steering pulls right off-throttle

    Quote Originally Posted by lancialulu View Post
    Worn idler box causes most off trottle steering problrms......
    I've also seen it with bad rod ends on the center link between steering box and idler
    Ed Levin
    Fulvia 1,6 HF

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    Legendary Lancista Marnix's Avatar
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    Re: Reverse-torque steer - steering pulls right off-throttle

    Quote Originally Posted by 1,6 HF View Post
    I've also seen it with bad rod ends on the center link between steering box and idler
    Actually on any of the steering rod ends. It is rather logical: if one of the rod ends is worn, and with front drive acceleration pulls on the wheels, and decelerating brakes them. With a worn rod end on one side, it will change the direction of one of the wheels, making the car turn. Had it on mine at the very beginning, on the rod ends of one of the links between wheel and steering box/idle box (I don't recall which side)

    The rod ends are a "pain-in-the***", at least some of the aftermarket stuff. There is a rubber protection boot over it, and it is held by plastic ring which looks like it is cut of of a plastic tube. These tend to break, and then the rubber boot gets open, letting dust and dirt in.When that happens, deterioration is fast.
    Lancia Fulvia 2C 1964
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    Re: Reverse-torque steer - steering pulls right off-throttle

    Quote Originally Posted by Marnix View Post
    Actually on any of the steering rod ends. It is rather logical: if one of the rod ends is worn, and with front drive acceleration pulls on the wheels, and decelerating brakes them. With a worn rod end on one side, it will change the direction of one of the wheels, making the car turn. Had it on mine at the very beginning, on the rod ends of one of the links between wheel and steering box/idle box (I don't recall which side)
    .
    No question; any of the rod ends can produce that effect
    Ed Levin
    Fulvia 1,6 HF

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