Hadders
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| posted on 17/7/08 at 06:39 PM |
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Changing Sierra push-in to bolt-on driveshafts
From what i can make out this is possible if i have the right diff, but does anyone have any experience of doing this and if so what exactly would I
need to make the change? Diff is 7" sierra 3.38 with LSD so obviously don't want (read can't afford) to change. Shafts are
standard push-in tripode versions from a drum-braked Sierra.
Any info / experiences apreciated.
Cheers
Ben
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eccsmk
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| posted on 17/7/08 at 07:00 PM |
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on one we did we simply pushed the drive flanges into place and added the circlip on each side
the shafts all fitted without any hassle
or maybe we were just very lucky
ATB
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Dusty
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| posted on 17/7/08 at 08:20 PM |
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Do you mean you have a diff with bolt on flanges and a drum braked tripode rear end. If so I recently fitted a flanged LSD diff and simply removed the
tripodes and stuck lobros on the splined ends and bolted it all up.
Pic; Drum braked rear end, old shafts and outboard tripodes, new lobros inboard, new (second user) 3.62 7" LSD.
 
Rescued attachment a.JPG
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Hadders
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| posted on 17/7/08 at 08:33 PM |
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I have the push-in shafts and a diff to suit, so i guess i will need the flanges to make it possible to bolt in the shafts. can i just get these
flanges?
Reason for the question is supplier has said they have the dimensions for shortening bolt-on shafts but not for push-in ones, so the easiest thing
maybe for me to buy new shafts, CV's and hubs from disc braked car.
Interesting that you can put different joints on end of the shafts though Dusty.
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Mr G
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| posted on 17/7/08 at 10:34 PM |
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Edit: If your diff accepts push in tripod shafts then it's not LSD (Only one shaft would push in fully)
If the 3.38 is lsd then it's one that's had an lsd added from a 3.62 or 3.92 so would of though the lobro diff flanges would of been
attached when rebuilt.
As long as the driveshafts are 25 spline and not the cossie ones then the ends can be mix and matched.
I'm still not clear what setup you've currently got
[Edited on 17/7/08 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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Liam
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| posted on 17/7/08 at 11:18 PM |
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Hmmm if you've got an LSD with push in shafts it must be a quaife or other aftermarket. You may be able to just fit flanges from a bolt-on diff
into your push on if you can still access the innards enough to fit the circlips. Dunno if that would be the case though with an aftermarket LSD in
there.
Dont quite get what you're doing - having driveshafts shortened? If so can they not just shorten the push in shafts the same amount
they's shorten the bolt ons?
Liam
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JimM
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| posted on 18/7/08 at 11:48 AM |
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Taking this a little further ..... for a LSD.
What is the minimum parts list that needs to be changed to fit a LSD to a standard Sierra diff and drum brake setup. I'd like to upgrade but
with least cost possible.
Idiots level explanation please ...
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Mr G
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| posted on 18/7/08 at 12:25 PM |
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Minimum parts version would be:
7" LSD diff and a pair of matching lobro driveshafts/hubs - You can retain the drums by cutting off the caliper lugs and a bit of grinding
For discs as well you would obviously require calipers/discs plus changing the handbrake cable and adding flexible brake couplings to the calipers.
[Edited on 18/7/08 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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Hadders
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| posted on 18/7/08 at 08:26 PM |
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Thanks for the replies guys. Liam, Mr G, you are right. I have standard push-in shafts, but bought a reconditioned 3.38 diff with a Quaife ATB added.
I supplied shafts so they supplied correct diff / fitment.
When i supplied shafts the company - Stuart Taylor - said their supplier had lost the dimensions for shortened tripode shafts and so i had to measure
myself. Now they have sold the business to Caged, i'm having the same conversation with them. Yet to hear what they can do. However, have
spoken to GB Engineering and a number of other shaft manufacturers and they say with what i have i have to get an end float (i think) measurement.
This is so critical and i have no experience of it that i am wondering if i can change to bolt-ons so that i can just order shafts from Caged as they
should have measurements for them. Otherwise I have to work out a way to measure the exact length of shafts i need and i'm not sure how.. yet.
Help!
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MikeR
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| posted on 20/7/08 at 09:38 PM |
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i'm doing something similar - i'm getting custom shafts made for a drum rear end as i'm fitting a de-dion axle that is escort width.
I've spoken to the usual suspects and have a bloke lined up to make the shafts far cheaper than everyone else - i've got a suspicion that
he makes them for some others or makes them out of treacle due to the price (not GB engineering - they make their own but will only do the 160 quid
shafts now).
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