Tim_K
Guest
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Post subject:
Re: Crush Sleeve & Rearend Set-up
(Mon Jun 04, 2001 4:25 pm)
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| (User Above) wrote: |
: I have never had that happen, may-be a
: defective "non-crushable"
: sleeve!?!
:
: Are you using new pinion bearings? Basically a
: crush sleeve is a cheap & easy way (when
: it works) to set the "preload" on
: the pinion bearings. Note that the older
: rears used selectable "shim-packs"
: to do the same thing. If the bearing are
: good used ones, then they will need less
: pre-load.
:
: Also note that the racers tend to replace the
: crush sleeve with a shorter solid sleeve and
: use shims to get the final pre-load needed.
: (this allows for a looser - less friction
: setting that will not "drift" with
: the pounding of race use)
:
: If you want to stay with the crush sleeve,
: either add a thin shim to the old one or
: take the old one and "hammer"
: around the bulge, this tends to expand the
: length slightly (measure before &
: after)then re-crush it to add bearing
: pre-load.
: DD
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Got it working. After taking the entire axle to a friends' house, and with a total of 4 people holding the axle still and putting a piece of pipe on a breaker bar, the crush collar still wouldn't crush, so we did the trick of hammering around the edge of the old one to expand it. I kept track of it with a micrometer. The new one that would not crush was .470" thick, the old one when loose was .435"-.440", and after hammering, it was up to .450"-.455". We put it in and things went together nicely. Still had to put a lot of torque on the breaker bar to get it set right. Since I'm using all new pinion bearings and a new front seal, I let the bearings be a bit of a snug fit, requiring a slight amount of effort to spin the pinion gear without the ring gear being installed. After installing the carrier and making and using a tool to adjust the side adjusters down the axle tubes, it was ready to go.
After we were done, we thought for a while of if we should change axles that evening (last night) or not. After 15 minutes of debate, we decided to do it. We (2 people, Tim_K and one other person) set a new record for ourselves by changing the whole axle assembly in 2 hours, 18 minutes. If not for rusty threads on the axle to spring U bolts, we might have broken 2 hours. The new axle is quiet and runs well. The Sure-Grip locks up good and does not chatter like the old one did. The 3.90 gears are a HUGE performance increase over the old 2.71's, but highway cruising speed is not all that great, as expected. Can't have everything.
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