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Asking about axles

Posted: Sun Sep 30, 2018 12:08 pm
by ard126k
I've been looking through some old 'Slices; and I noticed a couple of items by the late great Robin Rew.

In the first he says that he has "fitted a few 3.07:1 ratio axles into overdrive SE5/5a's as they will pull this ratio quite easily..... but that gearing is too tall for the 6 series" and I'm puzzled as to why that would be the case, given that all the models have the same engine?

In the other article he says that spreading the axle casing is only necessary when fitting new diff bearings, not if reusing used-but-serviceable bearings. Is this correct?

I'm interested in axles at the moment because I'll have to do something about the GTC's one one of these days....

Alex.

Asking about axles

Posted: Sun Sep 30, 2018 1:37 pm
by Coupe Racing
When I have removed the CWP assy I have not to date needed to spread the case - but it is tight none the less

Asking about axles

Posted: Sun Sep 30, 2018 2:07 pm
by roymck
The 3.07 axle ratio works well in a SE5/5a but maybe due to the increased weight and increased frontal area it’s not suited for the larger cars . Never needed a axle spreader myself .

Asking about axles

Posted: Sun Sep 30, 2018 4:55 pm
by ard126k
Interesting replies! I have a surplus axle lying about. Can't quite remember where it came from but I might have a play with it to see how hard it can be before I start on the GTC!

Asking about axles

Posted: Sun Jan 13, 2019 6:07 pm
by ard126k
Right. I have the 'lid' off the axle, and I've taken the caps off the diff main bearings. I've arranged to borrow a slide hammer from the local garage to pull out the halfshafts, so after that the diff should be ready to come out. Is it just a matter of careful levering one side at a time, or is there more to it? :?

Alex.

Asking about axles

Posted: Sun Jan 13, 2019 10:00 pm
by scimjim
Have the half shafts been out recently? If not, it’s unlikely a slide hammer will work.

Asking about axles

Posted: Sun Jan 13, 2019 10:43 pm
by ard126k
Not on this axle but that was how I got one out to renew a wheel bearing on the SE5

Asking about axles

Posted: Sun Jan 13, 2019 10:47 pm
by AJL Electronics
Half shafts will come out with a slide hammer, it's the hub that needs the skill and tools (like wot i az)!

Asking about axles

Posted: Sun Jan 13, 2019 11:11 pm
by GavinR
The diff may come out without a spreader, but it's easier with one
You need to keep the diff bearings parallel to the case

I made one from 3 pieces of angle iron, a length of 1/2" threaded rod and 2 M16 bolts with the heads turned down to fit in the 2 recesses either side of the diff casing

Asking about axles

Posted: Mon Jan 14, 2019 10:36 am
by ard126k
Never occurred that I could make my own spreader! I should have some angle iron lying around. I'm imagining a "U" of it, with the threaded rod on the open side to provide the opening force. But doesn't the rod have a tendency to bend under the strain?

Asking about axles

Posted: Mon Jan 14, 2019 1:14 pm
by GavinR
Yes, a "U" shape with the threaded rod on the open side
You're only stretching it a fraction to overcome the preload on the bearings, maybe 1mm or 2mm at the most
This is why you can get them out without a spreader

Asking about axles

Posted: Thu Jan 17, 2019 11:44 am
by ard126k
It seems Scimjim's prophecy has come true,the shafts aren't for coming out via slide hammering☹️ I undid the 4 bolts at the end of the axle, that 'should' be all that holds them in, so any other bright ideas?

Asking about axles

Posted: Thu Jan 17, 2019 5:29 pm
by GavinR
This is a pic of my spreader
Image

Slide hammering should work, but I've also removed halfshafts by removing the wheel cylinder from the back plate and putting a threaded rod through the resulting hole to the bracket on the axle and winding it out. I thought I had a pic of this but cannot find it. Also be careful not to bend the axle bracket if you try this...

Asking about axles

Posted: Fri Jan 18, 2019 12:11 pm
by ard126k
Thanks for the picture Gavin. Pretty much what I imagined, save that I had all the angleiron facing the same way, which is silly because they wouldn't fit together properly!
I'll have a look at using threaded rod to push the shaft out. I'm going to need a more gentle method of working as one of my elbows has got damaged with all the crashing and banging the slide hammer about!

Asking about axles

Posted: Fri Jan 18, 2019 4:00 pm
by Roger Pennington
ard126k wrote:
Fri Jan 18, 2019 12:11 pm
as one of my elbows has got damaged with all the crashing and banging the slide hammer about!
been there, done that....... :roll: :oops: