ae86 crush sleeve length

[allencr]

Lengthen your old one, either with a hammer - the peening end of a ball-peen -, or with shim/s.

[choyr]

jondee, you are indeed correct. i reached the rotating torque only around 40 ftlbs. this means I cannot use this old one right? then I have no choice either put shims to the old sleeve, or make a solid spacer and shims

[jondee86]

choyr Wrote:jondee, you are indeed correct. i reached the rotating torque only around
40 ftlbs. this means I cannot use this old one right? then I have no choice
either put shims to the old sleeve, or make a solid spacer and shims

I hope you realise that you have just forced me to read though a lot of
hardcore tech articles to try and figure this one out And I still don't
really know for sure what causes the crush tube to come loose ??

Basically you need to preload the bearings to keep them happy. The
crush tube is essentially there to provide some decent clamping force for
the pinion nut, to stop it coming loose and unravelling. Staking the pinion
nut is another attempt to keep it from moving.

Once installed the crush tube does not see any extra load. In theory, you
don't even need it if you could lock the pinion nut after preloading the
bearings in some other way... by welding it for example. The radial loads
on the pinion gear translate into axial tension loads in the pinion shaft.
Sudden loads can produce enough "stretch" to overcome the bearing
preload, and then the shaft will snap back elastically. This is effectively a
"hammer blow" on the end of the crush tube.

When this hammering occurs repeatedly, either the crush tube becomes
slightly shorter, or the pinion nut becomes loose and starts to back off,
(I'm not sure of the exact mechanism) and the pinion shaft starts to float
longitudinally. This is a situation that is commonly referred to in
engineering circles, as the point at which everything turns to sh*t.

So to answer you question... yes, you could use the old crush tube if you
are confident that the pinion nut will stay exactly where it is. I can't
remember how much thread you have to work with... maybe Loctite a
jam nut on top of the pinion nut, mark it and check it after you have been
driving for a while.

I would still recommend getting a new crush tube (and new pinion nut)
and installing it as soon as you have the opportunity.

Cheers... jondee86

[irishtwincam]

http://www.weirperformance.com/solidpini...rkits.html

[choyr]

sorry for the late reply. this was taken last week. this is the fabricated solid pinion spacer & shims. installed in my lsd temporarily, but actually it does the job. but I will still order new one from weir. will replace this maybe around june.


inserted to the pinion