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Unread 04-11-2012, 06:29 PM   #1
jakeyj95
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1995 YJ Wrangler 
 
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Yj First ever gear setup 8.8

this is my first shot at gear setup, i took some pictures to see what you guys think, the backlash is .009" and i havent set either bearing preload yet. the pattern looks perfect to me but these are the first shim packs i put in based off what was in there before minus .005-.008" per side. my concern is that i didnt think there was anyway id be lucky enough to get it right on on my first try. any advice or opinions would be very helpful, oh and its an explorer 8.8 with motive 4.56s
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Unread 04-11-2012, 11:35 PM   #2
ratmonkey
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If you haven't set preload, those shots are pretty meaningless.

Set pinion preload, then make sure the carrier takes about two solid thumps with a dead blow to seat. Then take your pattern with enough drag on the gears to create about 50ftlbs of effort needed to turn them.

To set pinion preload on a crush sleeve axle without using a crush sleeve, you very carefully tighten the nut down with no sleeve in there till you get the correct turning torque.

if you'd fine everything right, that pattern indicates a pinion that is too deep and you should snug up that back lash...the wear looks odd too, appears that because things are a bit lose that you have some run out.
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Unread 04-12-2012, 04:56 PM   #3
jakeyj95
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thanks for the reply ratmonkey, i went ahead and set pinion preload,it was very touchy without a crush sleeve, i ended up tightening the pinion nut with just a deep socket in my hand. i added an .008 shim to the RGS and a .007 to the NRGS, it took about 4 good blows with a 3lb dead blow and it was fully seated. the pattern is definitly more defined now and seems to have evened out coast/drive side, BL is still .009". im gonna try adding a .003" shim to the pinion and see what happens
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Unread 04-12-2012, 06:25 PM   #4
Jason
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Quote:
Originally Posted by jakeyj95 View Post
im gonna try adding a .003" shim to the pinion and see what happens
I'd go the other way; looks like the pinion is too deep to me.
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Unread 04-12-2012, 07:38 PM   #5
jakeyj95
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Quote:
Originally Posted by Jason View Post
I'd go the other way; looks like the pinion is too deep to me.
by too deep do you mean too far from the axle centerline or too close because adding a shim brings the pinion closer to the centerline, i thought too deep meant too far from axle centerline
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Unread 04-12-2012, 07:49 PM   #6
Jason
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Too deep means too close to the ring gear center line. You got it backwards. You need to remove some shims from the pinion to get it away from the ring gear a bit.
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Unread 04-12-2012, 10:23 PM   #7
ratmonkey
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Exactly, you're reasonably close. I'd pull .005" from the pinion and see where you're at. I think you're still a little ways of from making small changes.
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