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Old 08-30-2020, 11:25 PM   #1
Talkwrench
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Default Again?! this time juddering at a stop

Its been months since replacing the center bearing and all has been fine, but just lately and only every now and then I get a juddering[?] just before the car stops.. WTF?! Anyway I cant pin point what it is. Ive looked down as its happening and my vacuum gauge is rock steady, Ive coasted, nothing, foot has been on the brake , nothing, I cant hear anything ..? I thought it might be a brake shoe dragging but I can pull away no problem, All seems normal when running, only just in that last two - three seconds before it stops.. The only thing Ive done recently is swapped to radial tyres [ 15x6 F100 rims]
Ideas guys?
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Old 08-31-2020, 12:04 AM   #2
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Default Re: Again?! this time juddering at a stop

out of round brake drum?
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Old 08-31-2020, 01:32 AM   #3
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Default Re: Again?! this time juddering at a stop

At idle and a great vacuum, it might be in your "head". But whom knows. Maybe the front end is loose or... all guesses. How is your kingpins to steering.
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Old 08-31-2020, 01:54 AM   #4
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Default Re: Again?! this time juddering at a stop

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out of round brake drum?
I think I would feel that throughout all the braking..? The juddering when I can feel it can be non existent to quite bad ..

Kingpins do have ware but not bad.. it wouldn't cause that type of juddering though, and why sometimes and not all the time?
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Old 08-31-2020, 02:00 AM   #5
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Default Re: Again?! this time juddering at a stop

Whom knows... But not engine though right?
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Old 08-31-2020, 02:14 AM   #6
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Default Re: Again?! this time juddering at a stop

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Long shot, check all wheel nuts are tight since wheels have recently been off.
Fault Finding 101; First look at what you have recently played with.
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Last edited by Phil Gillespie; 08-31-2020 at 11:34 AM.
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Old 08-31-2020, 09:18 AM   #7
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Default Re: Again?! this time juddering at a stop

not being smart never heard the expression juddering is it an aussie expression.I take it to mean shuddering but wondering is all
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Old 08-31-2020, 09:19 AM   #8
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Default Re: Again?! this time juddering at a stop

Did you install an aftermarket center bearing or NOS? Think back very carefully and try to recall exactly what you did on the installation.

Are all the nuts and bolts tight?
Are transmission and motor mounts tight?
Do you have "anti chatter rods?"

Does it happen "just before the car stops" with your foot on the brake pedal?

Does it happen when rear wheels are off the ground when on jack stands?

The loose wheel nut theory sounds very possible. Check that first.

Check the tightness of all the nuts and bolts you removed to replace the center bearing, if possible.

Pull rear drums and check wheel bearings etc.

Are all the rear radius rod nuts and bolts tight?

Last edited by 19Fordy; 08-31-2020 at 04:46 PM.
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Old 08-31-2020, 10:36 AM   #9
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Default Re: Again?! this time juddering at a stop

How about the clutch? Have you had problems with it engaging smoothly. I guess it's possible that it is not releasing smoothly. Reverse of when it shudders upon engagement. Never heard of it though, even tho I have had clutches stick, but usually after sitting.

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Old 08-31-2020, 11:25 AM   #10
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Default Re: Again?! this time juddering at a stop

Quote:
Originally Posted by Phil Gillespie View Post
Long shot, check all wheel nuts are tight since wheels have recently been off.
Fault Finding 109; First look at what you have recently played with.
Phil NZ
Along with the lugs, maybe a bent wheel?
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Old 08-31-2020, 01:09 PM   #11
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Default Re: Again?! this time juddering at a stop

Oil or grease on a brake shoe?.....Mark
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Old 08-31-2020, 03:02 PM   #12
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Default Re: Again?! this time juddering at a stop

Grimlins.
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Old 08-31-2020, 03:20 PM   #13
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Default Re: Again?! this time juddering at a stop

Mechanical brakes? Hydraulic?
Car? Truck? Motor bike? Push scooter? Farm tractor??.
IF they’re mechanical try disconnecting the pull rod or cable from one wheel at time and trying it.
Can you stop the vehicle with the hand brake. Feel anything?
Wear in the king pins usually doesn’t cause a shudder or a judder.
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Old 08-31-2020, 07:04 PM   #14
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Default Re: Again?! this time juddering at a stop

Quote:
Originally Posted by 54vicky View Post
not being smart never heard the expression juddering is it an aussie expression.I take it to mean shuddering but wondering is all
Shuddering will do [B]

35 pickup . Juice brakes

clutch operates as per normal was all apart about two years ago

wheels are straight I spun them up before I fitted the tyres

feels like the engine stalling and shuddering, however the vacuum gauge doesn't move , Alt light doesn't come on etc .

the center bearing is NOS was a prick to get in. I did had to tap the torque tube when putting it back together, didnt quite slide over the shaft. I did check after and all spun freely .. I know that shouldn't of happened at all ..

Are all the nuts and bolts tight? yes
Are transmission and motor mounts tight? yes
Do you have "anti chatter rods?" yes .. they where loose

Does it happen "just before the car stops" with your foot on the brake pedal? yes [and not heavy ]

Does it happen when rear wheels are off the ground when on jack stands? dont know

The loose wheel nut theory sounds very possible. Check that first. I torque them so ok

Check the tightness of all the nuts and bolts you removed to replace the center bearing, if possible. I'll check but have no doubts they're good

Pull rear drums and check wheel bearings etc. Jacked up rear and Ive got a random clicking - tick noise when turning both wheels.. aghh so that something, if it gets louder and more constant it will be similar to the center bearing gone again

Are all the rear radius rod nuts and bolts tight? yes

I went for a short trip after tightening the steady rods and it didn't do it , however its random and may take a longer trip..
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Old 08-31-2020, 07:08 PM   #15
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Default Re: Again?! this time juddering at a stop

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Grimlins.
Well Lawson it is 2020, god knows it hasn't been good and anything is possible. I have not been anywhere near water , mmm one of my dogs is called Gizmo...
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Old 09-01-2020, 09:12 AM   #16
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Default Re: Again?! this time juddering at a stop

"feels like the engine stalling and shuddering, however the vacuum gauge doesn't move , Alt light doesn't come on etc ."


You need to distinguish if it's the motor or something else and go from there.

Are you loosing RPMS ?
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Old 09-01-2020, 09:37 AM   #17
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Default Re: Again?! this time juddering at a stop

My '46 Coupe has done the same "juddering" on rare occasions. It happened when I was moving ahead slowly on a slight incline, while feathering the clutch. Again, it rarely happens, but it sure shakes the car and attracts attention to anyone around. It stops when I completely disengage the clutch. I don't have anti chatter rods, motor mounts are new and tight, and the clutch operates smoothly with the correct travel and adjustment. As it is a rare occasion, I'm not too worried about it.

Juddering = Jerking + Shuddering
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Old 09-01-2020, 10:54 AM   #18
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Default Re: Again?! this time juddering at a stop

My vote is something due to the clutch or clutch linkage. It sounds like what happens when you don't push in the clutch as you come to a stop. Like after driving an automatic and forgetting you are in a stick vehicle.
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Old 09-01-2020, 12:39 PM   #19
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Default Re: Again?! this time juddering at a stop

This may be way off track but I had a similar situtation with a 1992 vehicle when I applied the brakes.

Turned out one of the new rear brake drums was out of balance. New drum installed and
problem went away.
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Old 09-01-2020, 05:23 PM   #20
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Default Re: Again?! this time juddering at a stop

Rob, my 28 ccpu had a huge shudder when cold coming down our drive,sometimes I thought it would snap a stub axle or something, I put up with it for a month or so, as it was right when I next applied the brakes, stripped the front brakes and it had grease on the linings,cleaned it with brake clean and it’s now as right as.
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