jq1
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| posted on 23/4/03 at 07:14 PM |
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Granada Rear End
Has anyone got any info on how to use the granada diff and shafts in a locost chassis? I have a cosworth scorpio running gear and it seems a shame to
not use it. I have seen some diagrams of the setup used for a sierra rear end are they in any way similar?
THESE THINGS TAKE TIME!!
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James
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| posted on 23/4/03 at 11:17 PM |
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quote:
Originally posted by jq1
Has anyone got any info on how to use the granada diff and shafts in a locost chassis? I have a cosworth scorpio running gear and it seems a shame to
not use it. I have seen some diagrams of the setup used for a sierra rear end are they in any way similar?
If you've got IRS plans such that you can use a Sierra diff then there's no real problem using the Granada but bear in mind the Grandad
has a 1" wider track than the Sierra.
You also need to pay attention to how wide the top mount is. They are usually 7" or 7.5" but there are a few 9" around too
apparently.
There are two types of Sierra shaft- one which is in three parts and is held together with Torx bolts and one which is complete and has a splined
shaft at one end which feeds into the diff.
If you tell us which type of shaft it has (I suspect the 3 part one) and which size diff we may be able to help further.
Hope that helps,
James
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eddymcclements
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| posted on 24/4/03 at 07:55 AM |
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I'm using a Granada Scorpio diff, hubs, brakes and shortened drive shafts. They came from a '92 2.9 V6 (not Cosworth) and appear identical
to those fitted to disc-draked Sierras - in fact they must be as they're now fitted to a Stuart Taylor IRS chassis which was designed around
Sierra components.
Hope this helps,
Eddy
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stephen_gusterson
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| posted on 24/4/03 at 08:57 AM |
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in my view the sierra is the granada with a smaller body or vice versa for running gear purposes.
The granada always had disk brakes, and is my strong suspicion that like granada, all disk rear cars have the long torx bolted joints.
If these are the earlier T40 bolts, they are bastards. They need a lot of torque to get them out after a bit of corrosion and the T40 cant take the
torque. I went thro 3 torx T40 half inch drive heads.
Its best to grind the top off the subborn ones and screw the exposed remaining stud out with a pair of mole grips.
atb
steve
[Edited on 24/4/03 by stephen_gusterson]
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ChrisW
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| posted on 24/4/03 at 09:19 AM |
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I'm currently trying to combine a Granny and Sierra back end to build my car (following advice from Grant at Luego). On the car I've just
stripped (2.8i v6 Auto) the diff is the same as the Sierra one I already had but the drive shafts are too long for the standard design (and as
mentioned, I couldn't get the torx bolts undone)
Anyway, my plan is to remove the bearing carriers from the Granada and swap them onto my existing Sierra shafts to convert them to disc brakes. So
far it appears to be possible but I'm yet to actually bolt it all up. Will let you know...!
It looks as if the ends that go into the diff are identical on both sets of shafts so with any luck you will stil be able to use your Cossie diff.
A final point - it was suggested that all Granny's came with LSDs. This was not the case with the one I have!
Chris
[Edited on 24/4/03 by ChrisW]
My gaff my rules
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jq1
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| posted on 24/4/03 at 09:55 AM |
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granada
Thanks for the help . I have taken apart the granada rear end and yes the torx bolts are a nightmare. I have decided to go ahead with the design but
I have a few questions.?
Does the fact that the granada is one inch wider really matter? Is it just a case of refabrication of the wisbones?
are there any other calipers I could use as the ones I have are antilock and ver heavy.
Thanks for the help
THESE THINGS TAKE TIME!!
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ned
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| posted on 24/4/03 at 10:00 AM |
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I'm sure people will correct me but can't you just use sierra driveshafts, as these should be shorter than the granada ones?? and I
presume will fit as the diff is the same?
Thought about sierra calipers? not all rear disc sierra's were abs were they? also may depend on the uprights I guess, mounting brackets etc.
Andrew.
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James
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| posted on 24/4/03 at 10:41 AM |
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quote:
Originally posted by ChrisW
Anyway, my plan is to remove the bearing carriers from the Granada and swap them onto my existing Sierra shafts to convert them to disc brakes. So
far it appears to be possible but I'm yet to actually bolt it all up. Will let you know...!
<snip>
I'm hardly one to talk about making life easier but could you not sell both and just buy a disk back end? You might even get enough for a 4x4
LSD one if you want it.
Cheers,
James
P.S. I'm sure you know but just in case: Grandad is 5 stud Sierra is 4 so won't you have to use the Grandad front uprights to match?
[Edited on 24/4/03 by James]
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ned
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| posted on 24/4/03 at 12:13 PM |
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I would have to agree with james, sell the granada back end and buy a sierra back end, or source one from a scrappy.
I found someone on this forum who sold me a sierra disc brakes rear end, straight off a car (needs cleaning up) for £25!
As James mentioned, an xr4x4 rear end is even better as it has an LSD.
Andrew.
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eddymcclements
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| posted on 24/4/03 at 01:09 PM |
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James, Ned - why sell the Granada back end and buy a Sierra one? They are essentially the same, and it's not easy to find a disc-braked Sierra.
If the only problem is the driveshaft length it's hardly insurmountable - ST Motorsport can shorten it for you at any rate.
My Granada donor was fitted with ABS, but the calipers themselves are identical to disc-braked (non-Cossy) Sierras. The ABS system sensors plug into
holes on the uprights and sense fine "teeth" on the outer driveshaft (the splined part that passes through hub bearings). You can just
junk the sensors, plumb the calipers in as normal and there's no problem.
As for 4-stud or 5-stud, you can just swap the drive flanges from a Sierra onto the Granada drive shaft splined ends - it's a straight swap with
no mods.
Here's a picture of a Granada hub carrier bolted onto my upright, with a Sierra
4-stud flange. The large nut retains the splined driveshaft end in place, tho' in this photo the outer CV joint and shaft itself are removed.
Here's another photo from a different angle.
Feel free to mail me for more photos, measurements etc.
Cheers,
Eddy
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ned
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| posted on 24/4/03 at 01:54 PM |
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Fair comment eddy, out of curiosity do you know how much it would cost to get a pair of driveshafts shortened?
I just thought having a complete sierra disc back end without bespoke/modified parts might make it easier to maintain if replacements are ever
required....
I also thought it might work out cheaper than fiddling around with shortening drive shafts etc etc.
My answer isn't by any means definitive, just my opinion from my experience.
Andrew.
beware, I've got yellow skin
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Viper
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| posted on 24/4/03 at 02:00 PM |
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why not just get a pair of xr4 shafts and be done with it sod going to the expense and grief of having them shortened and balanced
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jq1
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| posted on 24/4/03 at 02:01 PM |
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Shortened drive shafts
I hope this is not to stupid a question but why must the driveshafts be shortened?
THESE THINGS TAKE TIME!!
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ned
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| posted on 24/4/03 at 02:07 PM |
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because (if you read the previous page you'd know that) granada's have a 1" wider track than a sierra.
beware, I've got yellow skin
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Liam
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| posted on 24/4/03 at 02:51 PM |
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I've always been fairly sure that Granada and Sierra shafts are exactly the same length. The extra half inch per shaft is most likely taken up
in the movement of the cv's which is about 40mm per shaft. I think that's much more likely than the idea that ford bothered making
1/2" longer shafts for the granny. I'd really like to know for sure though - i.e. have sierra and granny shafts in my hands at the same
time, to put this to rest.
Not all Granny's have LSD's - only 24V have them as standard if memory serves. You'll almost definately have the 7.5" LSD in
your 24V scorp - same as the sierra cossie but probably with the standard sized diff flanges and driveshafts.
The extra 1" (if it really is in longer driveshafts) only matters if you're buying a pre made chassis based around sierra parts. If
you're making your own chassis/suspension then id doesn't matter at all whether the driveshafts are longer or not.
If you are buying a chassis then most of them do take the 7.5" diff (but check with the manufacturer) but you may need to change to sierra
driveshafts if the granny ones are too long (which they probably arent).
Hope that helps,
Liam (using XR4x4 back axle - and front axle =) )
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ned
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| posted on 24/4/03 at 04:10 PM |
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anyone got granny/sierra drive shafts to measure them for us and comment??
beware, I've got yellow skin
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Liam
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| posted on 24/4/03 at 04:29 PM |
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I'll take the cv joints off both ends of one of my shafts and get the exact shaft length. It'd be handy to clear this up and see
what's what.
Liam
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theconrodkid
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| posted on 24/4/03 at 05:58 PM |
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ned,ive got a pair of seirra shafts looking for a home,mail me if u want to be their new owner
who cares who wins
pass the pork pies
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ned
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| posted on 25/4/03 at 08:26 AM |
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thanks conrodkid for the offer though I do already have a complete sierra disc back end, I was merely curious in my earlier posts.
beware, I've got yellow skin
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