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Old 08-15-2014, 07:38 PM   #1
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Dodge truck guys, help me out here if you can please.

My daughter has this '01 Dodge 1500 magnum, it has a chrysler 9.25 rear end in it and it makes this awful almost grinding noise when decelerating, not when speeding up, not when maintaining speed, only when decelerating. I read up on some of the Dodge forums and thought it was the clutch packs, I replaced those, the ring, pinion, carrier and bearings all look really clean, no metal shavings no discolored oil, no excess play, the clutch plates looked a little worn so I replaced them, got it back together and drove it, still this noise.

I made this video of the noise, this thing has the worst tire noise I've ever heard, it's obnoxious but she likes it, so. You can plainly hear it above the tire noise and wind. Thanks and I appreciate any insight in to what this is.

01 Dodge 1500 Magnum rear end deceleration noise - YouTube

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Old 08-15-2014, 11:05 PM   #2
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Hi OM. My Son had a 99 ram 1500, awful noise from rear , everything checked good.. Only thing I didn't check was the wear pattern of the ring and pinion.. 6 months later the pinion gear broke and the rear of driveshaft was left dangling on the ground. Two nights ago, my son stopped to help a disabled 01 ram 1500 on the roadside. Guys driveshaft was dangling. They pulled the diff cover on the roadside. You got it, pinion gear broken! Good luck!!

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Old 08-15-2014, 11:31 PM   #3
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Thats what I keep hearing, I didnt find any play at all in the pinion, but apparently it's a well known issue in the 9.25. Thank you for relating your experience with these axles.
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Old 08-16-2014, 07:51 PM   #4
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Wow, that's loud! Sounds to me like the pinion bearings are out of it. Grab the rear yoke and see if there is any movement. Those 9.25 diff kits are actually pretty cheap. Problem is, they don't come with the crown and pinion. If my guess is correct, you'll probably need them too.
Can you hear anything just jacking it up and spinning a wheel?
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Old 08-16-2014, 07:56 PM   #5
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No, no noise on stands and no play at all in the pinion, I just had the carrier out and replaced the clutch packs and there was no play inside or out on the pinion, but that seems to be the consensus.
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Old 08-16-2014, 08:02 PM   #6
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Did you try decelerating in neutral? Just to make sure it's not tranny noise resonating back.
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Old 08-16-2014, 08:56 PM   #7
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I did, yes, no difference at all

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1500 , 9.25 , chrysler , deceleration noise , dodge

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