AndyC
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 posted on 29/7/05 at 09:13 AM |
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Will my wheel fall off?
Hi,
I have searched previous threads on this topic but have been unable to find a definitive answer to settle my nerves.
I have discovered that both of my sierra front drive flanges are right hand threaded as oppossed to the N/S having a left hand thread. I will be using
new nylocks after replacing the bearings but is it safer to source a left hand threaded flange for the N/S?
Any advice greatly appreciated
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Scotty
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| posted on 29/7/05 at 09:37 AM |
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oohh, dont like the sound of that - i though the idea was self tightning nuts (so to speak)
let the experts come forth...
PLEASE NOTE! All comments made by this person are to be considered "Tongue in Cheek" and are not meant to be taken seriously in any way - so there!
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smart51
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| posted on 29/7/05 at 09:55 AM |
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early sierras did have a normal thread on either side. They changed it part way through production. Presumably they wouldn't have bothered if
there was no improvement.
That said, the tightening force on these nuts is hugh. I doubt that they'd come loose by accident.
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phelpsa
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| posted on 29/7/05 at 09:58 AM |
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I guess you'd check your car over regularly? In which case there probably wont be any problem. They changed because people who drove sierras
probably only had them checked at thee service/mot which could be 12000 or so miles apart!
Adam
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DarrenW
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| posted on 29/7/05 at 10:07 AM |
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If Ford originally had std threads on both sides i would presume this was tested and found to be Ok. Due to a possible concern they would have changed
it over later. I would guess the potential concern only affected a small number of vehicles under certain circumstances. Ford would need to develop a
car that could be driven by the masses with minimum maintenance in this area and be 100% fool proof. Se7en type vehicles generally see far less use
the Sierras, allbeit are driven at the limits. One option would be to tighten up to the specific torques and put a paint mark on the hub nuts. Over
time you can periodically check to see if there is any movement (slackening) and correct as required. If the movement proves to be problematic then
you can decide if it is best to change to LH on one side.
Lets see if you get a reply from someone with more experience of this. Another idea is to see if you can fit a second nut to act as a secondary
locknut (called redundancy countermeasure in automotive speak). Again with a paint mark you can easily inspect this (this is why HGV's and
PSV's have bright green plastic jobbies fitted to wheel nuts - so you can see ata glance if they have slackened off).
I hope this helps. Experts feel free to dive in.
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britishtrident
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| posted on 29/7/05 at 10:09 AM |
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On a 2wd the flange dosen't transmit any torque, there will be a rotation inertia couple from the stub axle if you lock a wheel but thats all
-- if you strip just tighten it properly, new nut and a drop of loctite on the threads and a dab on the splines.
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Peteff
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| posted on 29/7/05 at 11:47 AM |
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both of my sierra front drive flanges?
The front wheels don't drive on an Indy with a blade engine.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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AndyC
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| posted on 29/7/05 at 12:49 PM |
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Thanks to all for your advice- shall stick with the two R/hand threads i've got.
Peteff - My terminology is dodgy, should have said front hub flange as apposed to drive - would be a mighty tricky build to get the
front wheels to drive 
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bigandy
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| posted on 29/7/05 at 02:14 PM |
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I think I have two lefthand threads on the hub nuts on the front of my car.... I'm not 100% certain because I put them on so long ago!
Because they are undriven wheels, I am happy enough
Cheers
Andy
Dammit! Too many decisions....
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Liam
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| posted on 30/7/05 at 12:44 AM |
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Even on a 4wd the front hub nuts are both conventional threads. This is also the case on any front wheel drive car i've ever had the pleasure
of taking the front hub nuts off (pug 106, 205; alfa 164, gtv; rover 800, and probably more).
So I wouldn't worry either. Just make sure the nuts are torqued correctly and locked or staked.
Liam
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