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Old 01-03-2014, 10:37 PM   #1
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Question Grinding noise when decelerating?

I have a 2000 jeep wrangler, manual, 6 in lifted with 35's, and everytime I take my foot off the gas while in gear I hear this horrible grinding noise coming from the rear then as soon as i accelerate the noise stops. I have no idea what it is... thought it was the tcase, swapped it out for a new one and it still makes the same noise. does anyone have any ideas?

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Old 01-04-2014, 12:29 AM   #2
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Gears or brakes in rear axle? How's the fluid level in rear axle and transfer case? Ujoints good?

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Old 01-04-2014, 01:03 AM   #3
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Gears or brakes in rear axle? How's the fluid level in rear axle and transfer case? Ujoints good?
Ujoints are fairly new and I greased them a few months ago, the rear end just got new seals put in but I'm gonna drain the rear tomorrow and see if it's something in there... The higher the gear the more it grinds when I take my foot off the gas
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Old 01-04-2014, 05:19 PM   #4
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The rear diff backlash may need to be adjusted, or you may have a bad pinion bearing or something. Unless you're a gear adjusting whiz, I recommend making friends with a good drivetrain mechanic.
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Old 01-05-2014, 01:45 AM   #5
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The rear diff backlash may need to be adjusted, or you may have a bad pinion bearing or something. Unless you're a gear adjusting whiz, I recommend making friends with a good drivetrain mechanic.
But wont your drive shaft be loose. Seem im have the same problem but my drive shaft is tight. I justed change my front differential ring& pinion a month ago. Before I changed it i notice my front drive shaft was pretty loose ( very bad) signaling I have a bad bearing.
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Old 01-11-2014, 12:25 AM   #6
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i took off my rear driveshaft and found that my pinion nut was extremely loose... so i tightened it hoping that will fix it but i prob need a new crush sleeve
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Old 01-13-2014, 11:43 AM   #7
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Did it fix the problem?
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Old 01-14-2014, 09:03 AM   #8
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its either pinion angle or gears
you have to determine when it started happening to help us out..

did you even do gears?

with yer 6" lift im going with driveline.

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