CV axle - Sign of leak and likely eventual failure

[Tom 71 Maverick 24]

I think you're right about the extreme CV angle pushing grease out of the boot. This is on jack stands with wheels off the ground. As you can see my CV boot is leaking a bit of grease and getting flinged around. This is on the passenger side. Driver side is fine for now but still got an extreme angle on the CV joint. Not good.

In that image, is the wheel's weight supported by the jackstand or is it just hanging. That would account for some of the extreme angle if so.

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[Fibrepunk]

In that image, is the wheel's weight supported by the jackstand or is it just hanging. That would account for some of the extreme angle if so.

Likely just hanging. Here is another image where you can see when the wheel is just hanging.

 

[Silver23]

Looks to me like it was likely just grease caught under the boot/clamp during assembly. There is no way I would look at that little bit of grease and think it's going to fail because of that.

 

[Colliedogg]

Just my two cents worth, because the problem seems to be on hybrids mostly.
I wonder if there is more low end torque Associated with electric motors causing more strain on the joints at take off?

 

[icegradner]

Just my two cents worth, because the problem seems to be on hybrids mostly.
I wonder if there is more low end torque Associated with electric motors causing more strain on the joints at take off?

It shouldn't be the cause, it's not like these are the first hybrids to ever enter service, they've been on the road for over 20 years now. Never had any issues with CVs on my previous non-Ford hybrid.

 

[Colliedogg]

It shouldn't be the cause, it's not like these are the first hybrids to ever enter service, they've been on the road for over 20 years now. Never had any issues with CVs on my previous non-Ford hybrid.

Yes, true. But it may be as others have said. That the angle is more than it should be, and that electric motors produce more torque at lower rpm's.
I am just Hypothesizing. It may and/or may not be a cause.

 

[Colliedogg]

It shouldn't be the cause, it's not like these are the first hybrids to ever enter service, they've been on the road for over 20 years now. Never had any issues with CVs on my previous non-Ford hybrid.

Yes, the increased torque available from a hybrid car's electric motor can potentially cause more wear on the drivetrain components, particularly the tires, due to the near-instantaneous torque delivery, which can lead to increased wheel spin, especially during aggressive acceleration or in slippery conditions; however, modern hybrid systems are designed to manage this with sophisticated control strategies to minimize wear and tear.

 

[MoHillbilly]

I have a 1" level on mine so I figure the axles to go out fairly soon. When they do, and if Ford refuses to warranty them, I'll go back with the Tremor axles. They're coming from the factory with the 1" front lift and seem to be doing alright with it. From what pictures I've seen, look top be a bit heavier built than the regular axles..

 

[23grayXLT84]

Yes, the increased torque available from a hybrid car's electric motor can potentially cause more wear on the drivetrain components, particularly the tires, due to the near-instantaneous torque delivery, which can lead to increased wheel spin, especially during aggressive acceleration or in slippery conditions; however, modern hybrid systems are designed to manage this with sophisticated control strategies to minimize wear and tear.

Its a CV axles.
Zero excuse that it should be failing. CV axles have been around for how long ?
Poor design and/or poor quality.

 

[Automan21]

It’s not just hybrids. A lot of ecos on here with the same issue. Did my oil the other day and saw the same thing. Grease seepage through the clamp on the passenger side but none on the driver side. I cleaned with brake cleaner and then applied some black rtv on the boot where it contacts the axle to seal it up. Been dry ever since 200 miles and dry now.

 

[FunctionSpec]

It’s not just hybrids. A lot of ecos on here with the same issue. Did my oil the other day and saw the same thing. Grease seepage through the clamp on the passenger side but none on the driver side. I cleaned with brake cleaner and then applied some black rtv on the boot where it contacts the axle to seal it up. Been dry ever since 200 miles and dry now.

Good idea using black rtv where it leaks at. I just did mine right now with blue rtv and hope it stops the small leak of axle grease.

 

[Automan21]

Good idea using black rtv where it leaks at. I just did mine right now with blue rtv and hope it stops the small leak of axle grease.

Hope you cleaned the surfaces that u put the sealant on with brake cleaner. Looks like you have more than a bit of seepage. Like that wet mark passed the tag on there. Hopefully there’s still more than enough grease in the boot. Good thing is you won’t lose anymore. Good luck.
im at 724 miles from putting on sealant and still dry no seepage.

 

[FunctionSpec]

Hope you cleaned the surfaces that u put the sealant on with brake cleaner. Looks like you have more than a bit of seepage. Like that wet mark passed the tag on there. Hopefully there’s still more than enough grease in the boot. Good thing is you won’t lose anymore. Good luck.
im at 724 miles from putting on sealant and still dry no seepage.

Mine definitely had more than a bit of seepage. Little BB sized pellets of grease flung out and got on the frame that made it look like sloppy welding spots. Not a lot but just enough to go unnoticed. Cleaned everything with brake cleaner which is why part of the frame and half the axle looks "wet". Hopefully it holds up . Thanks for the idea!

 

[Rivers90]

I have a 1" level on mine so I figure the axles to go out fairly soon. When they do, and if Ford refuses to warranty them, I'll go back with the Tremor axles. They're coming from the factory with the 1" front lift and seem to be doing alright with it. From what pictures I've seen, look top be a bit heavier built than the regular axles..

Yes the Tremor cv's are stronger. But a heaver, stronger axle will hurt you MPG so it does have a downside.
https://www.mavericktruckclub.com/f...dard-cv-vs-tremor-cv-comparison-photos.55795/

 

[HeyBales]

Yes, the increased torque available from a hybrid car's electric motor can potentially cause more wear on the drivetrain components, particularly the tires, due to the near-instantaneous torque delivery, which can lead to increased wheel spin, especially during aggressive acceleration or in slippery conditions; however, modern hybrid systems are designed to manage this with sophisticated control strategies to minimize wear and tear.

If I lay into the pedal to get more than the power meter 10% HP and torque - I'm not getting just the electric motor - engine is coming on.
And at that point the amount of torque coming from motor isn't that high.

The difference between what is possible with motors and EV's, compared to the strategy used on the truck - is pretty huge.

I know if already driving within certain speed range and you nail the pedal the motor kicks in to help a lot and fast - so maybe that potential still exists.
I'll need to get some readings.

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