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Tim is local to me and recently took his gears out on this exact obstacle.....the fronts were in a tight bind
and even with some common sense use of the clutch, the gears went bye-bye. Tim is not running a gear eater....It's an 85 X-cab pickup
22RE 5 speed with a single 4.7 case and 36" Iroks. The 3rd was purchased about 18 months ago from a national 4x4 chain
pre-assembed and ready to go. With Tim's modest use of the clutch and his drivetrain set-up, this should have lasted much longer.
First, to do an autopsy of sorts and then install some heat treated and cryo'd 529 gears from Bobby Longfield.
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The main damage to the ring...
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...
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The pinion teeth are stronger and the teeth usually stay intact.
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This is most of the debris found in the oil.
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Strange that the o-ring blew out. Tim reports that the ARB worked perfectly up to the very end.
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The special ARB adjuster wheel was tightened with the wrong tool....the chisel and hammer method is a no-no
with this adjuster. The raised ridges causes the seal housing to sit un-evenly and could cause an o-ring to
pop out.
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Strangely enough, the commercial 3rd did not have an oil retainer...no oil slinger....and came with
just a cheap crush sleeve. This new install will have the right stuff as shown above.
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Upon dis-assembly, I noticed that one of the adjuster wheels was not installed properly and most of the damage
was restricted to the wheel itself.
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This is the new Bobby Long ring and pinion along with the new seal housing assembly and improved Viton o-rings.
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The heat treatment is obvious looking at the blue discolorations.
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The ring is pressed on the ARB case. ARB seems to run tight tolerances and the tight fit is typical.
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As usual, red loctite and 75 ft/lb on the 10 ring bolts.
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Both cryo treated carrier bearings were pressed on.
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A .079 pinion shim is pressed on with the cryo bearing.
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The oil retainer taps into place very nicely right under the outer pinion bearing race.
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Both pinion races are pressed in place at the same time.
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ARB cases are just a little bigger than other cases so they are known to occasionally contact the pinion teeth.
I am being pro-active here and will use the flapper wheel to soften the edges and improve the clearance. This does
not effect strength.
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...
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The solid collar is left out until I get the pinion depth set correctly. The pinion nut is tightened until about 10 in/lb
of pinion drag is measured.
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too deep.
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heavy heel pattern...
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Teardown and remove the bearing and lighten the shim....
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Seems ok....but maybe I could go a little deeper now.
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...
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Re-shimmed to 071 and I like this much better.
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The coast side is not as "classical". Backlash changes did not help.
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With the correct depth, now is the time to install the solid collar and get the shim value right for it. On the 4th try,
I had a shim of .024" and 10 in/lb of pre-load.
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Tim works on trimming the ARB copper tubing here.
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The carrier bearing adjusters were carefully tightened to get the 150 pound pre-load.
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Just have to ding the pinion nut and done :)
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