Transmission & Drivetrain Gearboxes, Differentials, Clutches

Loud knocking clunking crunching noises inside trans

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Old Feb 26, 2012 | 02:57 AM
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portenio78's Avatar
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Default Loud knocking clunking crunching noises inside trans

Car drives in every gear and I pulled the axles hoping to find something with no luck. Car has a MFactory LSD. It seems the loudest in 4th and 5th. Something is deffinately coming apart in the case. Any suggestions before I pull the trans out on what to expect?
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Old Feb 26, 2012 | 04:11 AM
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Default Re: Loud knocking clunking crunching noises inside trans

Probably a bad bearing. Pull the transmission and split the case, it should be pretty obvious at that point.
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Old Feb 26, 2012 | 05:38 AM
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Default Re: Loud knocking clunking crunching noises inside trans

Noise is worse than bearing noise LoL. Sounds like a "circus" in there with broken and missing parts.
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Old Feb 26, 2012 | 08:20 AM
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Default Re: Loud knocking clunking crunching noises inside trans

Update: Had to push the car around in the garage in neutral, and the front wheels will completely lock up!! Start the car and put it in gear, and I can force it to unlock, but with a bog ol "clunk" from the tranny!!
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Old Feb 26, 2012 | 11:52 AM
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Default Re: Loud knocking clunking crunching noises inside trans

Sounds like a bad diff bearing, diff sounds like wobbling around in the case a bit now, if it's locking up and snapping you've probably ruined the final drive at this point, expect to find broken/chipped teeth on the ring and pinion. Expect something that looks like this:




^ that one didn't go bad from a bad diff bearing, I'm pretty sure it was directly related to wheel hop.
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Old Feb 26, 2012 | 12:25 PM
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Default Re: Loud knocking clunking crunching noises inside trans

Ya I had some bad wheel hop. The car is stiff, and when it wheel hops, it shakes the **** out of everything for sure.
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