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Unread 05-01-2013, 10:14 PM   #1
g_oneill
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1995 YJ Wrangler 
 
Join Date: Aug 2011
Location: Woodbury, MN
Posts: 92
torque to crush a sleeve?

How much torque can you apply to the pinion nut to get the sleeve to start crushing on a D35. Installed new ring and pinion. I am up to 250 lb/ft.

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Unread 05-01-2013, 11:46 PM   #2
5-90
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1988 XJ Cherokee 
 
Join Date: Sep 2006
Location: San Jose, CA, Hammerspace
Posts: 5,344
Crush sleeve is a preload-setting device, and the torque varies. It depends on how much crush is needed to properly preload the pinion bearings. Somewhere around 200-210lb-ft, you should have begun tightening your pinion nut in small increments and regularly checking bearing preload - turning force - with a lb-in torque wrench to assess the amount of preload on the bearings.

STOP RIGHT NOW if you don't have an lb-in torque wrench that can be read (beam-type, dial-type. A "micrometer-type" won't work) and go get one - and get a spare sleeve, while you're about it. If the bearing preload is set too high, you must replace the sleeve and reset it! You can't "uncrush" a sleeve.
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Unread 05-02-2013, 09:04 AM   #3
g_oneill
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1995 YJ Wrangler 
 
Join Date: Aug 2011
Location: Woodbury, MN
Posts: 92
5-90 Thanks for the reply. I do have the right torque wrench to test. I was only at 6 in/lbs (Spec says 14-27 for new bearings) at 250 on my big torque wrench on the pinion nut.

I figured it out. I was using a 6inch impact extension on the end of the torque wrench (to reach out past the yolk). Giving me a false reading on the big wrench, I think it was twisting(removed the extension). I am now at 210 ft/lbs and 18-19 in/lbs on the preload. I then put on the yolk seal and a new nut went to 210 again now have 21 on the preload.

I remember cursing the shim process on the D30 and could not wait to get to the crush sleeve. I think I like the shims better.
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