Just regeared to 4,56. Pinion bearing was burned with 3000 miles - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 8 Old 10-05-2013, 06:19 PM Thread Starter
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Just regeared to 4,56. Pinion bearing was burned with 3000 miles

Rear pinion had almost no pinion preload. 2-5inlbs. Pulled the pinion and bearing was scorn, pinion had burned oil on it. And fluid looked like crap. Only have 3000 miles on the jeep. So much for quality control at the factory.
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post #2 of 8 Old 10-05-2013, 07:17 PM
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How many setups have you done?

What brand gears?

If I recall, you messed up a crush sleeve and made up your own preload spacer, didn't you?

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post #3 of 8 Old 10-06-2013, 03:18 AM
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also keep in mind that there is a break in period on gears, there are actually heat cycles that need to be done. although i cant remember off the top of my head
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post #4 of 8 Old 10-06-2013, 05:42 AM
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i think hes saying he pulled the oem gears and found this

'92 YJ
'13 WK2
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post #5 of 8 Old 10-06-2013, 08:32 PM
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his description is vague. there was 3k on the 4.56 or 3k on the stock jeep with the stock gears?...english please

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post #6 of 8 Old 10-06-2013, 09:23 PM Thread Starter
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Sorry. I have 7 miles on the new gears. Just finished this morning. I have done a half dozen sets. I am breaking them in correctly. Short trips, cool down periods etc. I made a solid spacer for the front axle.

The oem rear pinion was burned. 2500 miles on the odometer. Bearing was badly scored. Pinion had oil burned onto it. Fluid was nasty. Front was fine. When I checked the stock rear pinion preload it was <5 inlbs. I think that was the problem. I reused the front bearings and set the back lash at .008, had a perfect pattern, and set the pinion preload at 10inlbs I think on used bearings. On the rear I got backlash to 10, had a really nice drive pattern, coast patter was large and round but slightly outside. Pinion preload set to 30inlbs.

I expect it to be all good but will probably do a gear oil change at 500 miles and check the magnet on the drain plug and the color of the fluid.

Last edited by x-rated; 10-07-2013 at 04:19 PM.
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post #7 of 8 Old 10-07-2013, 09:02 AM
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i was told to do a oil change at 500 miles whe ni had my gears done, had new bearings done at same time.

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'13 WK2
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post #8 of 8 Old 10-07-2013, 08:17 PM Thread Starter
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I will do the same probably.
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