How does this happen?!

[Lowcaljeepin]

I had some whining while coasting/ decelerating with light load so I figured it was my pinion bearings… so of course in true enthusiast fashion I see this as an opportunity to regear! But what the heck man? Anyone got an explanation for this?

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[Vtur]

Whining in coasting is usually sign of bad tail bearing. My guess is the tail bearing got loose and caused pinion to wobbles chipping off the teeth.

 

[Glad Jeeper]

Did you find the chipped off pieces?

 

[willys 41]

I had some whining while coasting/ decelerating with light load so I figured it was my pinion bearings… so of course in true enthusiast fashion I see this as an opportunity to regear! But what the heck man? Anyone got an explanation for this?

I have rebuilt 100s of diffs and when I hear a wine when coasting or decelerating it is almost always a loose pinion. There could be many reasons why you have a loose pinion. Bearings / crush sleeve or the nut back off.

 

[RubiNewbCB]

Are the factory gears produced by YUKON?

 

[willys 41]

Are the factory gears produced by YUKON?

I think they are Dana gears

 

[rharr]

I had some whining while coasting/ decelerating with light load so I figured it was my pinion bearings… so of course in true enthusiast fashion I see this as an opportunity to regear! But what the heck man? Anyone got an explanation for this?

That's not stock is it? OEM pinions use a double ball bearing bearing, not tapered.

I stand corrected.. i think, front bearing is tapers, back bearing is ball.

MIght want to consider this when you do your regear, this replaces the double ball bearing.

https://trailforged.com/product/jl-jt-rear-m220-axle-bearing-upgrade-kit/

 

[ShadowsPapa]

That's not stock is it? OEM pinions use a double ball bearing bearing, not tapered.

I stand corrected.. i think, front bearing is tapers, back bearing is ball.



Mish

Just the outer bearing is.

 

[RubiNewbCB]

I think they are Dana gears

The joke flew right over...

 

[jac04]

Did you use an impact on the pinion nut? If so, it may be possible that the teeth were damaged during disassembly, especially if there was excessive play in the outer pinion bearing.

 

[ShadowsPapa]

Did you use an impact on the pinion nut? If so, it may be possible that the teeth were damaged during disassembly, especially if there was excessive play in the outer pinion bearing.

Who does that??????

You hold the yoke, in some cases with a special tool that bolts to the joke, with a center opening for a socket to fit through, then you used a breaker bar to remove the nut as needed
Impacts on pinion nuts.
At least I never do.

 

[Lowcaljeepin]

Did you find the chipped off pieces?

Driveshaft pro in Whittier did not mention seeing them

 

[Lowcaljeepin]

That's not stock is it? OEM pinions use a double ball bearing bearing, not tapered.

I stand corrected.. i think, front bearing is tapers, back bearing is ball.

MIght want to consider this when you do your regear, this replaces the double ball bearing.

https://trailforged.com/product/jl-jt-rear-m220-axle-bearing-upgrade-kit/

Heavily considered it but the master kit included koyo bearings so I rocked with it if I ever have the same issue that’s gonna be my solution.

 

[Lowcaljeepin]

Did you use an impact on the pinion nut? If so, it may be possible that the teeth were damaged during disassembly, especially if there was excessive play in the outer pinion bearing.

They did not.

 

[Lowcaljeepin]

Who does that??????

You hold the yoke, in some cases with a special tool that bolts to the joke, with a center opening for a socket to fit through, then you used a breaker bar to remove the nut as needed
Impacts on pinion nuts.
At least I never do.

Hey good to see you back!! We were worried about ya

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