BUGA Community
Technical => Driveline => Topic started by: jesus_is_alright on October 05, 2011, 07:11:57 PM
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At the moment I'm sitting on 100kph (I know some of you are jealous)
I can wind her up to 110+ but I get some serious shaking going on. The best way to describe it is a bad wheel balance, or the engine running the wrong firing sequence.
Now I know that its neither of these problems, because my mags are new and balanced.
Might be worth getting them re-aligned.
Also, the shudder can be felt through the steering wheel / column.
Any idea of what to check / replace first?
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Ps, I know its a steering / suspension / wheels problem because I've killed the engine whilst driving at speed and its not affected it, so it can't be engine/trans. Also it feels like its frontend, not rear
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you dont have drums on the front do you?
i would look at tailshaft angle first.
i dont know how they do it professionally but i would try raising back of tranz with a washer or 2 to see if it improves/ gets worse of course if it gets worse try spacing the tranz crosmember so your lowering the tranz.
ben
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Yeah I got beddy drums on the front.
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oh look at the drums then see if you can get them balanced. they wobble at high speeds if not i think.. not 100percent sure
ben
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When mine had the same problem it was a bent output shaft on the gearbox causing the tailshaft to wobble slightly. An out of balance tailshaft would do the same at higher speeds. It cost me a cracked Hadfield bell housing before I found it!
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I've had the drums machines, shoes re lined, all new wheel cylnders, so they 'should've be all good
Also modified and balanced tailshaft a few months ago
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At the moment I'm sitting on 100kph (I know some of you are jealous)
I can wind her up to 110+ but I get some serious shaking going on. The best way to describe it is a bad wheel balance, or the engine running the wrong firing sequence.
Now I know that its neither of these problems, because my mags are new and balanced.
Might be worth getting them re-aligned.
Also, the shudder can be felt through the steering wheel / column.
Any idea of what to check / replace first?
check your wheel bearings.
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can you get front drums balanced? consider these drums originally designed with the beddy that only got up to 70 - 80kph max.
ben
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Also look at the rack to steering column coupling as well.
Warren
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Have you had a wheel alignment done since you put the new wheels on and had all the work done to the brakes? If not then start there. Also get the wheel balance checked anyway at the same time. I've lost count of the number of times my wheels have supposedly been balanced when I've had new tyres fitted and have then had to make another trip back to the tyre outfit to get them redone properly.
Once you've done the basics then start looking elsewhere.
Probably not a silly idea to get your shocks checked as well if you haven't already replaced them.
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I have had several different things causing vibration at speed. Out of balance front wheels. Universal joints chewing out. Worn tie rod ends. The trickiest was worn lower ball joints----replaced the one that was obviously faulty but also had to replace the other that felt perfect.
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Are your mags multifit? If so, you must fit hubrings to align the centre of the wheel exactly to the hub. Vibration will occur otherwise. & don't get the poxy plastic ones, get metal ones made up. I had a set made up for about $120.
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Hey all, thanks for all the help.
I got new wheel bearings the same time as I did all the other work. The mags are not multifit, and they have self locating nuts. I might look at getting my drums balanced. I need to get all my drums adjusted anyway. again thanks for all the feedback
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someone had something similar a while ago and it ended up being their wheel nuts were too long so it appeared that they tightened but would leave a little slack
By memory it was fixed by putting another washer on each nut
good luck
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if your wheel bearings are tensioned properly, check the balljoints by jacking the van and rocking the top and bottom of the tyre lightly to feel for play, if there is any more than buga all play, then they're likely your culprit.
Cant hurt to look into balancing the drums tho..
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J.I.A.R...... I had this drama when i first bought my van, it also had jelly beans , ended up being simple spacers as the wheels seemed to tighten up on the drums, but didn't quite. I just then changed to discs, would be the best thing you could do..
some said they would/could balance the drum, " but had to be done on the vehicle" $$$$$, sorry.
good luck ! go the disc!
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i just fitted disks to my green one....heaps better...
and 10 bolt diff in the rear...
hq stud all round now..
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Just took the beddy motorhome for a spin upntue motorway and got her wound upto 90 kph and noticed a bit of a hammering or tapping sensation in the steering wheel.
Took the centre cover off but not movement at the retaining nut.
It stops when below 80 kph , new front Pirelli steer tyres all balanced.
any ideas what it could be?
Does the steering rod have bushes in the steering tube?
Maybe they need tighting o r replacing?
Cheers
Ian
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Ian
I tried looking on here for more info but couldnt find it, someone has had this problem before and had to replace both the coupling and the universial, see picture below
(http://i198.photobucket.com/albums/aa315/johnabbott_2007/johnnos001.jpg)
Warren
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also look in direction of the drums if you have drums on the front. seem to sometimes create wobble.
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That was me Warren.... ;D ;D ;D ;D Best thing i ever did.
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Thanks for the info and suggestions, I'm in Sydney all this week
But will look further into it on my return.
Yeah, Ben I've got drums all round, so that might be a factor,
Or perhaps the tyres need rebalancing, or worn ball joints,
Or the universal needs replacing as Warren has indicated...
I just don't want it to be something that's gonna fall off or jam
The steering when I'm ranging down the road at 90 kph :o
Cheers
Ian
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ive got a story!
mate had a vs ute or somthing likethat. jacked it up on stands and reved her up cause he wanted to see the speedo get to 200kph. well a uni let go cause the angle was all wrong when it was on stands.. never herd the rest of the story but i cant imagine it ending well:(
just creep home Worby876.. you should be fine..
ben
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I just don't want it to be something that's gonna fall off or jam
The steering when I'm ranging down the road at 90 kph
Don't worry - it wont go that fast :)
Warren
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Worby, just give the wheels a shake up and down and side ways and then the tail shaft, if all good just do as Ben said and kreep home.
Bush mechanic 1 0 1
fencing wire can make a tempery uni
tailshaft loop
a tree branch can substitute for missing wheel
a broken ball joint or tie rod
a good burn out always fixs the balance on the back tyres(thats what I tell her)
The vibration could also be coming from the drive train, water pump, fan, ring gear, clutch and the list goes on. Please get it looked at and be safe
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mate had a vs ute or somthing likethat. jacked it up on stands and reved her up cause he wanted to see the speedo get to 200kph. well a uni let go cause the angle was all wrong when it was on stands.. never herd the rest of the story but i cant imagine it ending well:(
ben
Lucky you didn't try that with the ride on mower that you had up on the roof of your beddy once, ey?
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ay markb!
hey rossie how fast can you go with fencing wire as a uni?
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Not fast Ben, but it stops you getting stuck in the middle of know where. And if he thinks his got a vibration now, he ain't felt a vibration. Me and a mate did it up top of QLD in a HD ute in the early 80's. very slow trip and all I remember most was the slapping of the excess wire on the tunnel, and stopping a couple of times to redo it :D :D Those were the days ::) ::)
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Ah fencing wire - a bushies best friend ;D
When I was a spotty lad living in the bush I had a morry minor Panel Van, driving along the top drivers side ball joint gave way - got out the pliers, walked over to the fence, cut off a few feet, wired it all in place and limped into town ::)
Warren