Front end judder
- Aircooled Johnnyo
- Posts: 115
- Joined: 11th October 2012 - 8:07pm
Front end judder
Hi all
Driving my 72 Fasty and when I brake there is a juddering coming from the front of the car. I assumed it was warped brake discs, so I changed the front discs, pads and bearings. However it has made no difference. Any ideas? Also whilst checking out my fuel gauge sender I broke the filament wire, does anyone know where I can get some?
Cheers
John
Driving my 72 Fasty and when I brake there is a juddering coming from the front of the car. I assumed it was warped brake discs, so I changed the front discs, pads and bearings. However it has made no difference. Any ideas? Also whilst checking out my fuel gauge sender I broke the filament wire, does anyone know where I can get some?
Cheers
John
- purplepeter
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- Location: Bath, Avon
Re: Front end judder
For the sender, have a read of this: viewtopic.php?f=26&t=11983&p=58827&hili ... ome#p58827
Check the top arms of Your front axle for movement- it's explained in the Haynes manual or search on here
Check the top arms of Your front axle for movement- it's explained in the Haynes manual or search on here
- Aircooled Johnnyo
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Re: Front end judder
Cheers Peter
Great help as always
John
Great help as always
John
Re: Front end judder
and check your steering damper
- Aircooled Johnnyo
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- Joined: 11th October 2012 - 8:07pm
Re: Front end judder
Hi again.
Soooooo, still got the judders Have changed :- Front brake discs, pads, inner and outer bearings, front shock absorbers, the ball joints were new anyway, new steering damper. I have adjusted the steering box to remove a little bit of slack. Still have the judders.
At the weekend I removed the top arms to inspect. Hopefully the attached photos work, but the arms look okay to me, they measured 32mm on the inner bearing surface and 35 mm on the outer bearing surface, the dimple in the end of the rod looks fine as well. The car is slightly lowered on the front splines if that would make a difference? I have road tested with different (original) wheels which made no difference, and I cannot find any play in the tie rods or pitman arm. Is it worth removing the lower arms to check for wear? Anyone have a good front beam available? HELP!!!!! AAAAArgh.
Cheers
John
Soooooo, still got the judders Have changed :- Front brake discs, pads, inner and outer bearings, front shock absorbers, the ball joints were new anyway, new steering damper. I have adjusted the steering box to remove a little bit of slack. Still have the judders.
At the weekend I removed the top arms to inspect. Hopefully the attached photos work, but the arms look okay to me, they measured 32mm on the inner bearing surface and 35 mm on the outer bearing surface, the dimple in the end of the rod looks fine as well. The car is slightly lowered on the front splines if that would make a difference? I have road tested with different (original) wheels which made no difference, and I cannot find any play in the tie rods or pitman arm. Is it worth removing the lower arms to check for wear? Anyone have a good front beam available? HELP!!!!! AAAAArgh.
Cheers
John
Last edited by Aircooled Johnnyo on 7th August 2018 - 1:11pm, edited 1 time in total.
Re: Front end judder
Cant help directly with the issue, but ive sorted your image links out. You have to click the share arrow then copy the embed code to get the direct image link rather than just copying the page web address.
Have you tried running it at stock height, and have you had a proper wheel alignment done? What makes you certain is the front? I had a pulsing brake pedal many years ago and it was oval brake drums at the back causing the problem. Dont forget the back brakes will engage before the fronts, so you could try a light press on the pedal and see if it shows any signs
Have you tried running it at stock height, and have you had a proper wheel alignment done? What makes you certain is the front? I had a pulsing brake pedal many years ago and it was oval brake drums at the back causing the problem. Dont forget the back brakes will engage before the fronts, so you could try a light press on the pedal and see if it shows any signs
The sultan of swing
- Aircooled Johnnyo
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Re: Front end judder
Thanks Broady
I hadn't even thought about the rear brakes. If I gently pulled the handbrake on whilst moving that would confirm the rears ok or not?
Could you also tell me what the part in the picture of me pointing is for? It just bolts in, but should it me in a certain position?
Cheers
John
I hadn't even thought about the rear brakes. If I gently pulled the handbrake on whilst moving that would confirm the rears ok or not?
Could you also tell me what the part in the picture of me pointing is for? It just bolts in, but should it me in a certain position?
Cheers
John
- purplepeter
- Posts: 2339
- Joined: 8th August 2006 - 4:41pm
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Re: Front end judder
That holds the other end of the Torsion bar
Re: Front end judder
It might do, gotta be worth a try. But with the hydraulics you would get more feedback through the pedalAircooled Johnnyo wrote: ↑6th August 2018 - 4:26pmThanks Broady
I hadn't even thought about the rear brakes. If I gently pulled the handbrake on whilst moving that would confirm the rears ok or not?
Could you also tell me what the part in the picture of me pointing is for? It just bolts in, but should it me in a certain position?
Cheers
John
The sultan of swing
- Aircooled Johnnyo
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Re: Front end judder
Righto
Cheers
Cheers
- Aircooled Johnnyo
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Re: Front end judder
Pete
Why the odd shaped bracket thingy?
Why the odd shaped bracket thingy?
- purplepeter
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Re: Front end judder
Ask Dr Porsche!
I couldn't say for certain, but maybe it prevents movement of the arm below it, otherwise it's effectively a bloody big washer that'll take quite a lot of strain
You know the torsion bars cross each other?
Have You checked for lateral movement on the top arms?/ what state are Your thrust washers in?
I couldn't say for certain, but maybe it prevents movement of the arm below it, otherwise it's effectively a bloody big washer that'll take quite a lot of strain
You know the torsion bars cross each other?
Have You checked for lateral movement on the top arms?/ what state are Your thrust washers in?
- Aircooled Johnnyo
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Re: Front end judder
Good old Ferdi!
I detected a small amount of lateral movement, maybe 0.5 of a mm. I don’t know what to look for for thrust washer wear, any images I could compare?
I detected a small amount of lateral movement, maybe 0.5 of a mm. I don’t know what to look for for thrust washer wear, any images I could compare?
Re: Front end judder
Not something you can compare image wise. Its to be measured, ill post the info from my bentley manual when i get chance. what youve done is exactly how you would check for it though.
I believe the funny shape washer have a tab on the front which acts as a bit of lock to stop the bolt from undoing
I believe the funny shape washer have a tab on the front which acts as a bit of lock to stop the bolt from undoing
The sultan of swing
- Aircooled Johnnyo
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Re: Front end judder
Cheers Broady
Re: Front end judder
If you grab the top of each front wheel and pull and push out and in, is there any slack? If so that can be taken up in the upper bar. There's an M8 bolt and lock plate on the the end, and the slack is caused by wear on the plastic wear plates.
Dave.
- Aircooled Johnnyo
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Re: Front end judder
This is a pic of the beam end/thrust washer?
Does this shed any light on the possible wear?
When I grabbed the wheel I couldn't feel any movement by the way.
John
[imgThrust washer by J Marchant, on Flickr[/img]
Does this shed any light on the possible wear?
When I grabbed the wheel I couldn't feel any movement by the way.
John
[imgThrust washer by J Marchant, on Flickr[/img]
- purplepeter
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Re: Front end judder
Yes, that's it- there should be one each side of the beam
I use a chunk of fence post & a lump hammer on the passenger side top arm (Fence post gives you freedom to swing without whalloping the wing) to push all of the freeplay over to the drivers side, before tightening the little bolt.( less work/strain on the bolt & enables You to do the job without an assistant to check)
Then, obviously, get as much grease into the beam as possible.
I use a chunk of fence post & a lump hammer on the passenger side top arm (Fence post gives you freedom to swing without whalloping the wing) to push all of the freeplay over to the drivers side, before tightening the little bolt.( less work/strain on the bolt & enables You to do the job without an assistant to check)
Then, obviously, get as much grease into the beam as possible.
- Aircooled Johnnyo
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Re: Front end judder
Pete
Do you think that the thrust washer (which I assume is the silver round part with the slots in it) is showing wear? Or any of the other parts in the pictures?
Cheers
Do you think that the thrust washer (which I assume is the silver round part with the slots in it) is showing wear? Or any of the other parts in the pictures?
Cheers
Re: Front end judder
That's thrust washer looks in good fettle, check the other side foe the same.
I will give you the book procedure for adjustment later. Peters approach is ok, but those washers can crack so id avoid hitting them if you can.
I will give you the book procedure for adjustment later. Peters approach is ok, but those washers can crack so id avoid hitting them if you can.
The sultan of swing
- Aircooled Johnnyo
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- Joined: 11th October 2012 - 8:07pm
Re: Front end judder
Thanks everyone
John
John
- Aircooled Johnnyo
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Re: Front end judder
Thanks Broady
- Aircooled Johnnyo
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Re: Front end judder
Wellllll
Broady you are today’s genius.
Rear brake drums were out of round, new shoes and drums and she stops perfectly. Transformed the driving experience completely, thanks to everyone for your help and a gold star to Broady
On another note has anyone got an image of how the battery positive cable routes through the body to the starter motor. Mine goes through the floor pan and ou and over the rear axle, sounds wrong to me, surely it would chafe on the axle?
Thanks again
John
Broady you are today’s genius.
Rear brake drums were out of round, new shoes and drums and she stops perfectly. Transformed the driving experience completely, thanks to everyone for your help and a gold star to Broady
On another note has anyone got an image of how the battery positive cable routes through the body to the starter motor. Mine goes through the floor pan and ou and over the rear axle, sounds wrong to me, surely it would chafe on the axle?
Thanks again
John