HPDxxx
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| posted on 24/3/21 at 10:59 AM |
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Ford Sierra 7" - Titan LSD install - FLANGE issue
Hello guys,
i have a westfield with 7" sierra open diff installed from factory.
i have sent the unit to specialized dealer for installing a brand new Titan LSD.
they tell me that the flanges where i have attached drive shafts aren't compatible with this LSD...
it's something related to lenght and locking seger... i'm waiting photos from they.
do you have come experience about that?
thanks
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mackei23b
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| posted on 24/3/21 at 02:58 PM |
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Now I'm sure I did used to know this one...but for the life of me I can't remember. That said I know that all the Caterhams that run a
Titan diff use the tripod joints so it's worth investigating what the differences are between the lobro joint and the tripod and this may give
you the answer..?
I'm assuming that you have the lobro, bolt on CV joints?
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HPDxxx
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| posted on 24/3/21 at 04:04 PM |
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yes, i have 7" with lobro 100mm flanges.
caterham use push-in driveshaft, not bolted like mine.
here you can see photos from dealer.
HERE i think it's similar problem with trans-x
lsd:
quote:
This differential lock is only available for FORD 7" differentials. All Caterham with 7" differential always have the version with plugged
drive shafts. Various replicas use the 7" differentials with inserted shafts. If you supply us with drive flanges, they must have the same
length and an intact retaining ring for us to be able to provide this Tran-X lock. Otherwise, the appropriate drive flanges must be purchased from
Quaife.
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CosKev3
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| posted on 24/3/21 at 04:29 PM |
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If those output flanges are different lengths you had a LSD already.
Open diffs with bolt on driveshafts the output flanges are equal length
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mackei23b
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| posted on 24/3/21 at 07:42 PM |
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Agreed, it's a viscous LSD, the 2 piece flange for the crown wheel is a clear indicator as well as the input shaft lengths. The Ford LSDs can
lose their effect as the oil breaks down, you can test this the efficiency of the LSD, there is some info on the net somewhere on the service guide
for the Ford LSD.
The Titan will be a better diff as the Ford diff is really too stiff for a light car. That said I had one and it was still good fun!
Good luck...
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Charlie_Zetec
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| posted on 25/3/21 at 10:20 PM |
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Pretty sure I had a similar situation when I changed my Ford LSD to a Quaife unit years ago - ended up having to buy the Quaife output shafts to make
it work. I believe you can get the originals machined down to suit, but I couldn't tell you the details or where I found out as it's been
so long....
Artificial intelligence is no match for natural stupidity!
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HPDxxx
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| posted on 26/3/21 at 07:24 AM |
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the oem unit isn't viscous.
yes quaife flange can be a solution, they have same lenght and elastic seger to lock, thanks for input.
i'll try to mod original one, becouse due to the brexit now it's very difficult buy in uk, last shipping take me 2 month and goes crazy
with custom.
i'll keep you update.
thanks guys
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mackei23b
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| posted on 26/3/21 at 09:49 AM |
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Here you go http://www.locostbuilders.co.uk/viewthread.php?tid=204392 here is a link to the ford viscous unit you have...
There are no ramp angles or clutch plates in that diff
[Edited on 26/3/21 by mackei23b]
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HPDxxx
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| posted on 26/3/21 at 10:10 AM |
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thanks for help...
now i have installed a Titan carbon plate LSD... and the oem flange doesn't work.
do you know if it's possible to take off lobro from driveshaft and convert to "push-in" tripod? like caterham...?
the problem it's the lenght of my lobro flange doesn't match with titan, i need two with same lenght.
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HPDxxx
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| posted on 26/3/21 at 10:15 AM |
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so you tell me that i have flanges with different lenght becouse i had a viscous lsd installed before.
so i need two flange equal lenght from open diff?
some one have these to sell? 
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CosKev3
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| posted on 26/3/21 at 03:34 PM |
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quote:
Originally posted by HPDxxx
so you tell me that i have flanges with different lenght becouse i had a viscous lsd installed before.
so i need two flange equal lenght from open diff?
some one have these to sell?
Yes you had a viscous LSD.
Open diff would have equal length output shafts
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HPDxxx
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| posted on 26/3/21 at 03:43 PM |
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ok.. i have purchesed now a used diff unit with flanges without viscous unit.
i hope to use/mod these flanges with my titan.
i'll update you when will arrive. 
thanks for your support guys!
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mackei23b
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| posted on 26/3/21 at 04:06 PM |
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Good luck, I hope this sorts everything out for you.
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HPDxxx
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| posted on 29/3/21 at 07:21 AM |
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i'll update when all parts arrive thanks
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HPDxxx
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| posted on 9/4/21 at 08:50 AM |
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hello guys... forum is back! 
meanwhile diff unit with open diff it's arruived, and both flanges have equal lenght.
i need to short both for some mm and make a seat for snap ring compatible with titan.
i'll update when will be ready
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big_wasa
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| posted on 9/4/21 at 09:30 AM |
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If you have to shorten them can you not just shorten one from the ford lsd diff ?
The stubs are very hard steel. I had to use carbide bits to turn the outer hubs down.
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HPDxxx
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| posted on 9/4/21 at 10:08 AM |
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flange of ford lsd have different lenght, one it's too short and other it's too long, so i need anyway another couple of flanges and the
ideal one come from open diff (thanks to CosKev3).
here flanges from ford viscous lsd
here you can see open diff flanges
will be modded like this.
where you see washer it's the seat of snap ring on titan unit.
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big_wasa
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| posted on 9/4/21 at 01:03 PM |
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Thanks for the info very useful
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HPDxxx
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| posted on 9/4/21 at 02:27 PM |
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modded!
i'll make snap ring with armonic wire in photo...
cross finger i'll update when installed.
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HPDxxx
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| posted on 13/4/21 at 02:38 PM |
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it seems to work
i'll update when will on the road again 
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HPDxxx
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| posted on 22/12/23 at 03:01 PM |
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hi guys, after two years of use I can say that the change worked.
I'm not completely satisfied with the snap ring system, but they didn't cause any problems, both on the road and on the track.
but now I have another friend who bought a titan and is in the same situation as me, he needs two flanges for Sierra differential 7" equal in
length (like those found in open differentials).
Can you tell me a shop that only sells new or used flanges?
I only found them on the Quaife website, but they cost a lot.
Thanks for your help
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