Xtreme Kermit
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| posted on 21/11/09 at 08:45 PM |
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Not a good day - lsd diff fitting issue
So finally gor round to starting the diff upgrade on Kermit today and hit a small snag 
All was going well, got the hub hub nuts undone, bearing carrier off, push in drive shaft withdrawn all without issue.
Then I bolted the bearing carrier back on and tried inserting the outer end of the drive shaft (lobro) into place and the damned thing fouls the
upright 
You may not be able to see it clearly, but it fouls both the top and bottom of the inside of the upright which is a quantum bespoke part.
Looks like I have to shell out on new uprights which take the lobros.
Does anyone know if the bearing carriers are the same bolt pattern on disk and drum braked sierras?
If they are, I may stand some chance of carrying on with this plan - otherwise I may have to completely rethink and do a disk conversion too
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owelly
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| posted on 21/11/09 at 08:54 PM |
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I'm pretty sure the holes are in the same position but rotated through 90degrees if that makes any sense??
http://www.ppcmag.co.uk
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Xtreme Kermit
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| posted on 21/11/09 at 09:04 PM |
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Struggling a bit, her is the layout I have.
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owelly
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| posted on 21/11/09 at 09:08 PM |
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Imagine turning the brake backplate through 90 degrees and thats where the holes are for a disc set-up. (IIRC!!)
http://www.ppcmag.co.uk
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Xtreme Kermit
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| posted on 21/11/09 at 09:12 PM |
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that is not good news, as one of my options was to pick up a set of uprights for a disk braked Xtreme from the boys at Q branch, and just use the rest
of the existing kit.
Sounds like a non starter
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Johneturbo
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| posted on 21/11/09 at 09:38 PM |
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no reason why u can't cut off the caliper bracket and use the disk hubs on ur drum brake set up. bolt holes are the same
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Xtreme Kermit
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| posted on 21/11/09 at 09:55 PM |
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Now there's a thought... That's what I like about this place - some great viewpoints!
Are the bearings the same for disk as they are for drum?
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Johneturbo
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| posted on 21/11/09 at 10:09 PM |
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no the bearings are bigger, they were for when i done the same conversion! i also had to get new uprights made for the same reason.
i already had disc brakes with a converter plate. but u can use the bearing cariers cut off the bracket for the calipers abd keep the rest.
another option is to use a lobro inner and use a push in outer, but u need to have the right number of splines on the inner part of ur push in
shafts.
only way of knwing is the cut the shaft open.
there are a few threads on here. if u do a search
http://www.locostbuilders.co.uk/viewthread.php?tid=113835
this thread explains it better than i did
[Edited on 21/11/09 by Johneturbo]
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Xtreme Kermit
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| posted on 21/11/09 at 10:20 PM |
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or i guess I could pull the back off the diff, remove the circlips that hold the stubs into the diff, and convert the diff to push ins.
Does that work with an LSD?
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Johneturbo
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| posted on 21/11/09 at 10:24 PM |
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Nope you can't do that. the inner shafts in the diff are unequal lengts for the lsd
bummer i know, as that would solve a lot of issues!
[Edited on 21/11/09 by Johneturbo]
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Mr G
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| posted on 22/11/09 at 12:28 AM |
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As Johneturbo has posted you can't just do that, the offside shaft would fit but the nearside one needs to have a shorter splined section as the
lsd unit is that side.
I've wondered if the splined end could be cut down to allow it to fit in using the removed stub on the nearside as a template for depth.
Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.
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snapper
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| posted on 22/11/09 at 05:57 AM |
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There is some info on the Ford Sierra owners club site
( with photo's) on making a bespoke shaft using a Diesel sierra push fit shaft and a DOHC blot on ( I think its Marty you need to search on),
you take off the diff end tripod and replace with the bolt on Lobro, that way you can keep your drum setup and uprights and use any bolt on diff.
A method I am hoping to use so i can keep the drums but fit my LSD
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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Xtreme Kermit
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| posted on 22/11/09 at 12:08 PM |
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thanks guys - I'm going to start drawing up a pros and cons list of each option and see which way to go.
I will share later...
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Xtreme Kermit
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| posted on 22/11/09 at 03:01 PM |
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So here are my options aside from hybrid drive shafts: What do you reckon?
1) Modify existing Uprights:
mark out interference
cut excess metal out
put strengthening in
Job Done
Pros: Lowest Cost: no new parts
Cons: Engineering skills I do not have
2) Buy new uprights
mark out holes for existing bearing carriers
drill new holes
Job Done
Pros: Very Simple
Cons: at least £200
3) Buy new uprights and fit discs
Buy new uprights
Buy driveshafts, hubs, carriers, discs, brakes, handbrake cable
Strip back end
Fit new uprights, hubs, discs
recon and fit calipers
recon drive shafts again
shorten handbrake cable :-(
Job Done
make new brake lines up
Pros
off the shelf - little engineering?
disc brake look good
Cons: COST £££££: largest amount of work: brake balance upset?
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Xtreme Kermit
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| posted on 22/11/09 at 06:49 PM |
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or as suggested by Johneturbo and snapper, make a hybrid shaft with a lobro inner and tripode outer...
Thanks guys, this now looks the easiest option.
All I need is a set of DOHC or Diesel driveshafts ripe for conversion.... (WTD ad coming up)
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Mr G
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| posted on 22/11/09 at 06:59 PM |
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Snapper - You can run an lsd with lobro flanges and lobro driveshafts and have drums without having to make up hybrid lobro/tripod driveshafts.
That's what i'm currenty running on my XR4i, on a seven I suppose it's all reliant on the design of the upright and if any meat can
be taken off to allow the lobro to be used ok.
On the sierra rear arm the hole needed enlarging and the abs 'nodules' needed removing from the shaft.
Concerning the hybrid shaft here's a pic I had from a previous thread on the topic (originally from the sierra owners forum iirc)
Cheers
G
[Edited on 22/11/09 by Mr G]
Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.
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