Passenger rear wheel shake when letting out clutch

[mbroadbridge]

My truck is freshly restored (new clutch, springs, bushings etc). On the passenger side rear, my new wheel bearing lasted maybe 500km before failing. When I let out the clutch from a standstill in first or reverse the passenger rear wheel shakes/chatters. Is there a chance that my trac loc has an issue?

 

[DirtDonk]

First time I remember hearing of such a thing. So I don’t have an answer for you, and I don’t know if a limited slip differential can do that. But it seems logical to focus on that.
Either that, or a bent housing.
Also, which wheel bearing type are you using? Still the original sealed ball bearing type, or the upgraded tapered rollers?

 

[Broncobowsher]

Did you see this once? I am sure the shutter is predictable. Just want to make sure it is that wheel only, or you just happen to notice that one wheel one time. Straight line, turning left, or turning right? Soft ground, pavement?

 

[mbroadbridge]

First time I remember hearing of such a thing. So I don’t have an answer for you, and I don’t know if a limited slip differential can do that. But it seems logical to focus on that.
Either that, or a bent housing.
Also, which wheel bearing type are you using? Still the original sealed ball bearing type, or the upgraded tapered rollers?

The axle is a big bearing style and I have SKF sealed bearings in it. The shaking just seems to resonate from that rear corner.

 

[mbroadbridge]

First time I remember hearing of such a thing. So I don’t have an answer for you, and I don’t know if a limited slip differential can do that. But it seems logical to focus on that.
Either that, or a bent housing.
Also, which wheel bearing type are you using? Still the original sealed ball bearing type, or the upgraded tapered rollers?

The axle is a big bearing style and I have SKF sealed bearings in it. The shaking just seems to resonate from that rear corner

Did you see this once? I am sure the shutter is predictable. Just want to make sure it is that wheel only, or you just happen to notice that one wheel one time. Straight line, turning left, or turning right? Soft ground, pavement?

it is every time you let out the clutch. Direction and terrain don’t mean anything. It is really focused to that rear corner which is why I question if it’s something like the flywheel

 

[SteveL]

My truck is freshly restored (new clutch, springs, bushings etc). On the passenger side rear, my new wheel bearing lasted maybe 500km before failing. When I let out the clutch from a standstill in first or reverse the passenger rear wheel shakes/chatters. Is there a chance that my trac loc has an issue?

If it's a fairly new install check the torque on the spring bolts and u-bolts.

 

[m_m70]

I'm really having a hard time following this one.

On the passenger side rear, my new wheel bearing lasted maybe 500km before failing.

How did it fail? Or are you saying because of the chatter, you believe it failed?

When I let out the clutch from a standstill in first or reverse the passenger rear wheel shakes/chatters.

Can you see this?? Or does it just feel like it's coming from there?? If you can actually see this happening, a video would be interesting to see!

it is every time you let out the clutch. Direction and terrain don’t mean anything.

This sounds like basic clutch chatter which is common. Mine had it so bad I thought the whole drive line was going to drop out.

It is really focused to that rear corner which is why I question if it’s something like the flywheel

Fought the chatter for years. Mine ended up needing new bushings in the z-bar and adjustment.

Good luck with this. Wish I could be of some help here....

 

[mbroadbridge]

When I rebuilt the Bronco I had new ends welded on the axle (bearing housings). The bearings fit tight. When the new bearing failed so quickly I started to focus more on this chatter. The whole truck isn’t shaking, but it really feels like that back corner. If I Jack it up and roll the tire back and forth the passenger side can rotate maybe 2” before the driveshaft engages.

 

[DirtDonk]

That play is common in rear differentials. Especially limited slip and locking types.
But even open discs can have a lot of play between the spiders.
Is the differential new? And is it a limited slip, locker, or open?

 

[mbroadbridge]

That play is common in rear differentials. Especially limited slip and locking types.
But even open discs can have a lot of play between the spiders.
Is the differential new? And is it a limited slip, locker, or open?

It’s the Ford 9” Tracloc with no modifications. I took it apart and inspected it early on and everything looked good. I was questioning if maybe the thrust washers were thin and I didn’t notice or something was worn and I didn’t notice.

 

[DirtDonk]

Got it. Maybe someone else will chime in with their experience, specifically with Traclocs.
But I remember them having a lot of play at the wheel.
I shouldn’t say “a lot “as much as it’s more than you expect. And at the outside diameter of a tire, could easily reach 2 inches of rotation.

 

[m_m70]

And at the outside diameter of a tire, could easily reach 2 inches of rotation.

yup..........pretty normal from my experience with my lockers over the years.

 

[mbroadbridge]

When the flywheel is not great, does it shake the whole truck?

 

[m_m70]

When the flywheel is not great, does it shake the whole truck?

it can.
I would remove the rear drive shaft and put it in 4 wheel high and drive it around a bit and see if you still have an issue. If you still have the same chatter, you know it's not coming from the rear components.

 

[DirtDonk]

Or if you put it in four-wheel low, leaving the hubs unlocked, and you let out the clutch like normal, it would usually go away if it’s the clutch.
I don’t know how much that would change a rear wheel reaction, and I can’t explain why a bearing would deteriorate so quickly. But I know that when the clutches are deteriorating and chattering, putting it in low range will usually get rid of that issue.

 

[73azbronco]

might want to start over, remove flywheel, do a runnout check of crank end, then have them runout the flywheel. No, it should never chatter unless bad


You should not be blowing up rear bearings of any kind, unless maybe damaged going in?

 

[302fix]

I have the exact same problem.

This all really started after I added the front cage and suspect the additional body stiffness has exposed a suspension issue.

My setup is 3 inch lift with 32 inch tires and 3.50 gear.

So far I’ve added 7 degree rear wedge. New Ubolts. New flywheel and clutch and rebuilt trans. New shocks. No improvement.

Next I’m going to go with 4.11 gear with a differential rebuild.

Now that I’ve done all that I think the problem will be found in the spring perches or maybe the leaf springs.

Basically I miss diagnosed from the start. The advice here to drive it in front wheel drive and get a video is where you should start. Hindsight-more time diagnosing would have saved time, and money.