ae86 crush sleeve length
02-18-2014, 06:55 PM
Post: #1
ae86 crush sleeve length
Hi. Does anyone know the length of a new and unused crush sleeve or pinion spacer for the pinion gear. Also, the solid spacer pinion has the same length of the crush sleeve? Many thanks
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02-18-2014, 10:53 PM
Post: #2
ae86 crush sleeve length
[Image: AEU86 AE86 - ae86 crush sleeve length]
http://forums.club4ag.com/zerothread?id=31174

Crush tube is compressed (crushed) on purpose until the required
preload on the bearings is achieved. It does not use shims.

Solid spacer does not crush. Shims are added or subtracted and the
assembly torqued up to achieve the required preload. The process mey
have to be repeated several times until the preload is correct.

The two items cannot be compared by length.

Cheers... jondee86
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02-19-2014, 01:59 AM
Post: #3
ae86 crush sleeve length
Thanks jondee. Yep I understand, I just want to know if I can still use my old crush sleeve. Getting a new crush sleeve is hard to find in my area, and if I order solid spacer, it will take time to get here. I'm planning to make a solid spacer and shims if my old sleeve needs to be replaced and I can't find a new one here.
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02-19-2014, 06:01 AM
Post: #4
ae86 crush sleeve length
The OEM crush sleeve is designed as a one time use item. The factory
say you should use a new one each time. However, if you understand the
purpose of the crush sleeve, then it is possible to re-use it under certain
circumstances. For example, there was a very good writeup somewhere
on the old Club4AG site, showing how to change a leaking pinion seal
without using a new crush tube. In that case the bearings are not changed
and so the distance apart does not change. By tightening the nut back to
exactly the place it was before, the original preload is again obtained.

But when the bearings are changed, it is likely that the bearings will be
slightly further apart, and therefore the bearings will contact the outer
race and become preloaded before the crush sleeve is loaded.

[Image: AEU86 AE86 - ae86 crush sleeve length]

This will result in the crush tube being loose on the shaft, and the shaft
being able to float longitudinally, changing the contact patch between the
CW and pinion. Therefore when fitting new bearings you should always
use a new crush tube. The purpose of the crush tube is to act as a self-
adjusting (no shims) spacer between the inner bearing races. A solid
spacer needs to be shimmed to obtain correct preload, and that can be
a time consuming process.

Cheers... jondee86

PS: You could of course try using a shim with the old crush tube to get a
second life out of it, but for sure I never told you that Tongue
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02-19-2014, 11:30 AM
Post: #5
ae86 crush sleeve length
thanks again jondee. Now I am stuck on what to do. I tried looking for a new one and can't find new crush sleeve. If only I know the dimensions of the solid space, I can temporarily fabricate one till I get a new solid spacer. I already set the pinion and carrier bearing preload, and also backlash. Should I install it or not? Btw, the R and P are new 4.778 from weir
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02-19-2014, 12:14 PM
Post: #6
ae86 crush sleeve length
Total length of the solid spacer is 54.5mm, if that can help.
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02-19-2014, 01:04 PM
Post: #7
ae86 crush sleeve length
How is that crush tube so hard to find? Toyota sell a kit for the differential that contains it for a reasonable price IIRC. I think I have 2 of them somewhere in my basement. If you really cant get it locally I would consider selling one to you, but that will take time as well.

FABRICA MI DIEM, PVNC!
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02-19-2014, 02:04 PM
Post: #8
ae86 crush sleeve length
choyr Wrote:I already set the pinion and carrier bearing preload, and
also backlash. Should I install it or not?
You can't use the differential assembly without a spacer or crush tube. If
you do, you risk serious damage to the CW&P and the pinion bearings.
The spacer or crush tube is there to lock the two bearings solidly together
with the specified torque applied to the pinion nut. You cannot torque the
nut and lock the shaft in position without a spacer or crush tube.

Cheers... jondee86
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02-19-2014, 03:55 PM
Post: #9
ae86 crush sleeve length
jondee, currently the spacer installed is the old one. it is already in rotating torque of around 11inlb.

@ivan, i'm living in the mountains Smile Smile, ae86 is not sold locally. I am also very far from the capital city. all of my performance parts come from US at the moment. that is why instead of ordering a new OEM sleeve or solid spacer, it is faster to fabricate 1 solid spacer with the help of my friend. my mistake is forgetting to order the solid spacer together with the R&P.

@thanks project D. I will try to tell this to my friend, also rely the thickness (3mm) from this blog. http://tkamango.blogspot.com/2012/01/sol...eeves.html
I will also bring my old pinion gear as basis for the solid spacer. I will also make him fabricate shims with different thickness. will try it tomorrow morning. Is mild steel enough or I should use carbon steel?

many thanks everyone
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02-19-2014, 11:20 PM
Post: #10
ae86 crush sleeve length
choyr Wrote:... currently the spacer installed is the old one. it is already
in rotating torque of around 11inlb.
How much torque was applied to the pinion nut to reach the 11inlb of
rotating torque ? If you applied 80ft-lb or more to the nut before reaching
the 11inlb, then the crush sleeve is supporting the bearings correctly, and
you should be able to use the pinion.

But if you reached 11inlb with only 20 or 30ft-lb of torque on the nut, then
there is not sufficient load on the sleeve, and you should not use it.

Cheers... jondee86
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