Knocking during hard acceleration

[Blueassassin]

My truck has only done it once I did a launch in High mode felt like the front tires tried to lift and made this sound won't do that one again.

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[SirMouthsALot]

Does it sound like the sides of the tread are hitting the ground under rapid torque? Mine will do it in standard height, but it never happens in low height.

I was thinking it was a lack of road force balance.

No, not even a little bit. It's very obviously a metal-on-metal sound.

 

[Jonger1150]

No, not even a little bit. It's very obviously a metal-on-metal sound.

Ah, that sounds different than what I experience. I believe mine is just tire wear.

 

[Jonger1150]

My R1T had the halfshafts replaced for this issue, but it came back not long after. After another service, I was in an R1T loaner that exhibited the same noise, then our R1S started doing it. Then another loaner like a year later that would also do it.

Putting on my engineering cap, I suspect it's some kind of a design defect where the torque pressure on the sliding joint prevents it from freely sliding, and forces the axles into the extremes of the tolerance in the mating pieces.

When the noise happens, if you let off after straightening out, and then get back into throttle, it's fine again. But, if you keep on the throttle until high speed, it starts rumbling and vibrating the whole truck because it never equalizes.

Wow, this describes it perfectly. Between the chatter noise and now this, I can't imagine that this half-shaft design sticking around. It's just not working for this vehicle.

I was going to see how it was after changing tires, but now I'm thinking it won't change much.

This suspension might have been too ambitious for a new vehicle and company.

 

[Lord Leroy]

Half shafts replaced and front drive unit replaced. Had it for about 2 weeks and seems to have fixed the problem. They also put more acoustic dampening material around the engine so that loud whine some of us get from 15-30mph especially when decelerating is better too.

 

[shap]

Half shafts replaced and front drive unit replaced. Had it for about 2 weeks and seems to have fixed the problem. They also put more acoustic dampening material around the engine so that loud whine some of us get from 15-30mph especially when decelerating is better too.

Same for me - same replacements, and for now it is fine. Not sure for how long. This is a freaking expensive repair if out of warranty...

 

[suprteck]

I just got my truck back and they said that noise is normal. Basically told me to wait till it gets worse.

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