Outboard Drive shaft S2 left hand thread?

[MRN I J]

I found the hub nut came loose on my S2, after very careful examination we came to the conclusion that the Imp stubshaft was made of a mild steel which stretched & they were made to a price of zero, my machinist mate made a stub shaft & nut in EN24 (4340 US), end of problem, torque the heck out of it, doesn't slacken with 150bhp, an LSD & hillclimb slicks.

[Pete]

I think this may of been an issue on my 550k mile europa. As one of the hub nuts on the rear. Looks like it has been altered to combat it.

[Chuck Nukem]

I think this may of been an issue on my 550k mile europa. As one of the hub nuts on the rear. Looks like it has been altered to combat it.

550k?!?!?!

[Pete]

Yes. Lol

[S2Zetec54]

Ok update...

I am going to buy a set of these drive shafts from PA motorsports, apparently they are EN24 he's going to turn them Down to 30mm to help with bearing choice and I think i am going to get him to turn up some inner spacers for me which he uses for his formula series cars where, if I understand correctly the contact area is larger at the ends than in the middle

After all this though I am rethinking which side to fit the left hand thread.....with old knock on wheel you'd put the left hand thread on the right hand side of the car.....thats right isnt it?? SoI am slightly befuddled

.....or does the D washer play a part here?

[SwiftDB4]

Good question about the thread orientation. My GT40 has left hand threads on the right side knockoffs. Europa owners don't seem to have loosening problems with RH threads on R side axles.
Seems I've seen this discussion before.

[S2Zetec54]

For the purposes of this thread I have been provided with this drawing which shows the dimensions of what I am buying

I have also added a screenshot of the inner spacer dimensions for all our models as I am interested in the following link being applied to my car for increased inner bearing contact using the 30mm bearing and a bespoke spacer such as this....may not be appropriate but intriguing

http://pamotorsport.com/for_sale/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=216&virtuemart_category_id=10&Itemid=109


Anyway...feel free to comment. (Not sure of the protocol of using grabbed information from the internet, I have permission from PA Motorsport but not the other one..would a moderator delete if necessary?)

[BDA]

Can somebody tell me if the diameter of the inside bearing land(?) (31 mm for S2 and 30 mm for TC) and the size of the U-joint the only dimensions that are different on those stub axles? Since they will turn the inside bearing land to 30 mm, do they also provide examples for the bigger TC U-joints?

These are supposed to be made of EN24 (which I think equates to 4340 steel in the US). This is very strong stuff (min yield = ~100,000 psi)! Depending on the heat treatment, I guess it could be much higher!

[MRN I J]

By heat treating EN24 it doesn't get harder like a lot of specialist steels which also becomes more brittle, it gets tougher which is more ideal for the applications we use it for, not many better steels above this, we have used some steel called M300 which is a lot tougher

[BDA]

Thanks for the clarification!

I finally took a look at your cars! Very interesting collection!

[Bainford]

Does anyone have a dimensional comparison for the two sizes of u-joints (TC & Special vs S1 & S2). Is it just the diameter of the u-joint bearing caps that is larger, or are the u-joint assemblies longer end to end as well?

[Pete]

I have a load of u joints in my garage. I’ll have to get a picture and measure after work tomorrow.

[jbcollier]

The TC/S ujoint is substantially larger all round.

[S2Zetec54]

My PA rear stub axles have arrived.

By the way there are no flats on the threads so one can't use the traditional D folding tab washer. As they are handed I'll try them like this first relying on the thread to keep them tight

Anyway I will use Richard Winters spacers and rear hubs for the rebuild along with new bearings

[lotusfanatic]

Lovely!