Please help my tiny mind........

[antonyj]

On the TVR rear drive shafts and the front stub axles, as you all know there are left and right hand threads.

To my thinking (which is obviously wrong ) the rear offside would be left hand thread so that when the wheels are turning the nut couldnt undo (I know they are nyloc), but the case is actually opposite...

Can some one enlighten me as to why???

[Avocet]

This is one that raged for many years! I THINK one theory is that when you stand on the brakes and lock a wheel, the inertia of the nut could try to undo itself so the left handed thread goes on the NEARSIDE rear. I think it's largely a throwback from the days when cars had wire wheels with big, heavy brass centre nuts. Unfortunately for that theory, it could be argued that (especially in the case of a TVR!) the rear wheels would be extremely unlikely to lock under braking BUT it would be very easy to dump the clutch and have them go from 0 to a fair few MPH in a fraction of a second and therefore, the LH thread should be on the OPPOSITE side!

I think it is probaby nothing to do with all that and is nore likely to be something to do with the sort of effect you get when you put a small circle inside a big ring and rotate the big ring causing the small circle to turn in the opposite direction. Also, any play in the splines of the driveshaft will result in the hub shuffling backwards and forwards slightly against the inside of the nut/washer and that might have something to do with it. Interestingly, the older Tasmins that used the Jag rear suspension sometimes had problems with the nyloc nuts coming undone so these were drilled and had a roll pin put through them AS WELL.

...but to be honest, I don't really know!

[antonyj]

Anybody else???

[SplatSpeed]

i though left hand threads where on the left only thats how i thought i remembered it until this

thought this was the usual case with wheel bearings

old escort mk 3

so the left wheel rotating tightens the nut

ask gtwayne he has silly wheels with only one nut

so four nuts on the wheels and one behind one

[antonyj]

SplatSpeed said:

i though left hand threads where on the left only thats how i thought i remembered it until this

thought this was the usual case with wheel bearings

old escort mk 3

so the left wheel rotating tightens the nut

ask gtwayne he has silly wheels with only one nut

so four nuts on the wheels and one behind one

But if you imagine looking at the near side rear wheel, if it was rotating forward and you held the nut still, it would undo......

Edited by antonyj on Tuesday 17th April 18:48

[Avocet]

It's not just cars with centrelock wheels. Heavy goods vehicles have traditionally had a left-hand thread on their nearside wheel nuts. That's another piece of my (incomplete!) jigsaw...

[SplatSpeed]

antonyj said:

SplatSpeed said:

i though left hand threads where on the left only thats how i thought i remembered it until this

thought this was the usual case with wheel bearings

old escort mk 3

so the left wheel rotating tightens the nut

ask gtwayne he has silly wheels with only one nut

so four nuts on the wheels and one behind one

But if you imagine looking at the near side rear wheel, if it was rotating forward and you held the nut still, it would undo......

Edited by antonyj on Tuesday 17th April 18:48

what exactly are we talking about holding it the wheel nut fairies???

[antonyj]

lol, I know in reality nothing would hold it.......