Gav
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| posted on 12/2/06 at 09:55 AM |
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Are Lobbro/pushin shafts interchangabe?
As the subject, can i remove the lobbro shafts from a Sierra V6 7inch diff and 'push in' my pushin shafts?
would like to find out before i go back down the scrappies with a set of tools 
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Gav
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| posted on 12/2/06 at 10:05 AM |
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or failling that, can i still use my drums etc with lobro shafts?
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cossey
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| posted on 12/2/06 at 10:37 AM |
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if it isnt a lsd then you can remove the lobros and use the push ins.
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carnut
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| posted on 12/2/06 at 10:41 AM |
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Can you use push ins on an lsd?
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cossey
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| posted on 12/2/06 at 10:52 AM |
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nope the lsd needs different length driveshafts whereas all push ins are the same length.
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Gav
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| posted on 12/2/06 at 11:02 AM |
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My pushins are not the same length if your talking about about total shaft length.
The near side one is shorter then the offside one.
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Flat Pack
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| posted on 12/2/06 at 11:08 AM |
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This has come up a few times recently and seeing as I managed to make a complete hash of it I'm pretty confident on what you can and can't
do
You can't simply remove the output flanges from the LSD and push in the driveshafts as the splined end of the shaft that fits into the diff will
be too short on one side.
What you can do provided you get the right bits is use a lobro joint at one end of the shaft and a tripode (push in one) at the other end. This means
you can still use rear drums. Firstly you need a diff that takes 100mm diameter lobro joints, I think all 7" non Cossie diffs were like this.
You can fit 2 of its lobro joints in place of the inner push in joints on the driveshafts from a 2.0l drum braked Sierra. If you don't know
what Sierra your push in shafts are from, the only way to tell is to remove one of the inner CV joints and count the number of splines on the actual
driveshaft it was attached to. 25 splines and the Lobro will fit Its literally a direct replacement, pull one off and pop the other one on.
That should give you what you need, I think RichieC has a pic of a driveshaft he did like this somewhere.
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Gav
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| posted on 12/2/06 at 11:10 AM |
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Thanks,
That was exactly what i was looking for.
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aerobrick
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| posted on 12/2/06 at 12:49 PM |
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Gav flat pack is bang on there is a post on the fordsierraownersclub.site on this subject.
And some good photos too
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RichieC
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| posted on 12/2/06 at 01:14 PM |
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The thread on the Sierra site is for paying members, but heres the document from the topic author Marty:
Rich
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Gav
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| posted on 12/2/06 at 05:18 PM |
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Thanks!
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mookaloid
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| posted on 12/2/06 at 08:12 PM |
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Mmmmmm interesting,
Would it be fair to assume that some one with a disc braked rear end who has a LSD but wants an open diff (or a Quaife ATB which is designed for push
in shafts) could change the lobros for push ins at the inner end?
Cheers
Mark
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scotmac
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| posted on 17/2/06 at 03:15 AM |
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It appears the lobo/torx style flanges (disc brake ones) use a clip on the inside of a "open" diff (original style sierra diff). Thus, is
it typically the case the "closed" diffs (ZF, quaife, ...) are all designed for the push-in style shafts???
If so, then i have the same question as Mark. ie, i have ZF, and i want disc brakes. So, can i use the push-ins on the diff side, and the disc brake
style on the outside???
TIA, -sm
[Edited on 17/2/06 by scotmac]
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scotmac
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| posted on 17/2/06 at 03:18 AM |
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And if the answers to my last questions are that i need the push-in on the inside, and i can use the disc stuff on the outside, then where the f*ck do
i get the push-in flanges if i am in the states??!!!??
Aren't all the US based Merkurs torx bolted??
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Liam
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| posted on 17/2/06 at 01:26 PM |
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Whether you can use flanged shafts on an aftermarket diff depends on whether you can access the mechanism inside to fit the circlips. Looking at what
quaife atbs look like it'd definately be impossible ti fit the circlip on those, dunno about ZF though, but probably the same. You need the
circlip though as unlike the push-in tripode joints, the lobro joints aren't sprung, so without the clip there is nothing to stop the flange
working out off the spline or at least past the oil seal.
With the correct push-in and lobro shafts, you should be able to hybrid them to create a shaft with push-in inners and lobro outers for disc brakes,
sort of the other way round to Flat Pack's post.
Your easiest option though might be to run normal push-in shafts and get a disc brake conversion kit that are freely available.
Liam
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scotmac
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| posted on 18/2/06 at 12:39 AM |
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Thanks for the reply Liam.
I actually have these uprights:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=4610414182&rd=1&sspagename=STRK%3AMEWN%3AIT&rd=1#ebayphotohosting
I was hoping to just be able to bolt the above upright to my existing fabricated rear uprights, which are made for the drums. ie, the bolt pattern on
the above cossie's looks to match the drum brakes bolt patten. Then i just need pair of rotors/discs and calipers and i am set....i hope!!!
So, assuming, as you said, that i can use the torx style (non-push-in) shafts w/ the push-in flanges, does anyone know how/where i can get those
push-in style flanges/driveshafts????
TIA, -sm
BTW, sorry for hijacking the thread.
[Edited on 18/2/06 by scotmac]
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birt
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| posted on 18/2/06 at 11:00 PM |
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The latest Quafie ATB's will accept lobro joints. Although it is still true that you can't get inside to fit the circlips, they now use
'snap rings' which sit in the groove on the lobro shaft where the circlip would be. when the lobro joint is pushed into the diff the snap
rings simply expands and hence retains the joints. This is now possible since Quaife have added a chamfer to the inside of the diff so that you can
remove the joints using a slide hammer and the chamfer will contract the snap ring so that the lobro will come back out again with a little force.
I know this because I have fitted a new Quaiffe ATB to my Sierra diff and I am using lobro joints both sides with disk brakes.
As for having shafts with lobro's on the diff side and push ins on the hub side (or vice versa) surely this is not a good idea.. The push in
joints are spring loaded and hence don't need retaining circlips. The springs in the joints appose each other and therefore keep themselves in
place. If you put a lobro on one side then only one side of the shaft would be spring loaded and hecne would be in danger of coming out....?
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mookaloid
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| posted on 19/2/06 at 11:01 AM |
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Hi Birt,
So you don't need to buy Quaife's own Lobro flanges any more? This is the main reason why I haven't bought an ATB diff yet.
Cheers
Mark
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birt
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| posted on 19/2/06 at 11:35 AM |
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Mark.. I have slightly over simplified it.. Quaife have made the diff able to accept Lobro joints via the internal chamfer. But the snap ring does
not simply sit in the old circlip groove. You therefroe have to buy the lobro joints from Quaiffe at a ridiculous price...
OR...
You take your old lobro joints to Stuart at Classic Conversions in Sheffield. They will machine a new groove in the right place and provide the snap
rings at a fraction of the cost.
This is what I have done. And here are the pics to prove it. I dissmantled my LSD, threw away the Ford Visco bits, had the lobro joints modified by
Classic Conversions, stripped the case, bought a Quaife ATB unit from Rally Design and sent the lot to Road and Race Transmissions in Kent who put it
all back together with new bearings and seals. Top job all round.
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birt
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| posted on 19/2/06 at 11:36 AM |
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hmm, where did those pics go, try again....
 
Rescued attachment diff_mix.jpg
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mookaloid
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| posted on 19/2/06 at 01:37 PM |
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Lovely job mate
Thanks for the info too
Cheers
Mark
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scotmac
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| posted on 2/3/06 at 08:35 AM |
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Yes, very nice Birt. I would love to do the same...ie, some modification that allows me to use lobro joints. However, i don't believe the ZF
diff i have is going to be setup internally to take the snap rings, the way the quaife is, right??? Correct me if i am wrong...PLEASE!!! ;-)
[Edited on 2/3/06 by scotmac]
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birt
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| posted on 3/3/06 at 12:49 PM |
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Not sure about the ZF Diff, but Stuart at Classic Conversions seems to know everything about diffs, gearboxes and the like...
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