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Help: loud bang/clunk from tranny area

This is a discussion on Help: loud bang/clunk from tranny area within the General Help forums, part of the LSx Technical Help Section category; Well, i just had a new clutch installed a week ago. Everything seemed to be running fine.. Now fast forward ...

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    Senior Member wileyCoyote's Avatar
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    Help: loud bang/clunk from tranny area

    Well, i just had a new clutch installed a week ago. Everything seemed to be running fine.. Now fast forward to today, i'm driving to work as usual, and go over a bump, i think it's a bridge expansion joint, just like everyday, and hear something like "rattle rattle...bang". The noise sounds like it's in the tranny area, definitely under the floorboard/tunnel. It's like something broke loose from going over this bump.

    Now, it makes this "rattle, bang/thud, rattle",.. kinda noise when going over rough road/bumps or between coastdown and speed up. i drove it the rest of the way to work like this, being i was almost there. it's hard to explain the sound, ...it sounds as if there were a big rock down there that rolls/bounces around hits the floorboard/tunnel..?

    i looked underneath now that it's parked in the lot, ...didn't see anything hanging, but didn't feel around either because the exhaust and everything still hot and i'm dressed for work.. i hope it's ok for me to try and drive this a few mile to the shop for inspection?

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    Veteran 0rion's Avatar
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    sounds like either your exhaust is hitting the floorboard or you have a busted tranny mount. Does it do it if you take off fast or just over bumps?

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    Could also be a broken or loose torque arm mount... but like 0rion suggested, most likely a transmission mount. Could be the shop didn't get something tightened down all the way and it let loose.

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    Veteran 0rion's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Could also be a broken or loose torque arm mount... but like 0rion suggested, most likely a transmission mount. Could be the shop didn't get something tightened down all the way and it let loose.
    good point......and since it's so close to the install the first thing I thought of was something left loose or came back loose. I would take it back to whoever did the work and have them look at it.

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    Senior Member wileyCoyote's Avatar
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    if it's the tranny mount or torque arm, is it safe to drive it a few mile to the shop? before i parked it, i didn't have any problem shifting gears or using the clutch... just the bang/clunk noise and a slight whine sound...

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    None Shall Pass Knight's Avatar
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    You should be okay to drive it to the shop, just take it easy.

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    Veteran 0rion's Avatar
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    yeah...unless it's about to fall out it should be fine. I wouldn't beat on it or anything like that but you should be able to just drive it without an issue

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    old timer blue02Z's Avatar
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    i second the torque arm mount. makes since if it clunks on accel and decline

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    Spaz is My Mentor SMWS6TA's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Could also be a broken or loose torque arm mount... but like 0rion suggested, most likely a transmission mount. Could be the shop didn't get something tightened down all the way and it let loose.
    ^^^
    This. I had the exact same sound and description happen when I did my first clutch replacement. I guess I didn't tighten down the bolt that the TA connects to the the transmission. Scared the hell out of me when it first happen.

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    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by wileyCoyote View Post
    if it's the tranny mount or torque arm, is it safe to drive it a few mile to the shop? before i parked it, i didn't have any problem shifting gears or using the clutch... just the bang/clunk noise and a slight whine sound...
    you'll be fine... just take it easy on the way there... i actually snapped my stock TQ arm in half right where it bolts to the rear...

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    Senior Member wileyCoyote's Avatar
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    Ok, i have an update:

    got it to the shop, ..apparently they forgot to tighten a bolt on the torque arm. ...so hopefully problem solved.. but, jeez, w/ all the racket it made, it sounded as if the tranny was loose and going to fall out!

    thanks for all your inputs/replies!

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    old timer blue02Z's Avatar
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    No problem

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    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by wileyCoyote View Post
    Ok, i have an update:

    got it to the shop, ..apparently they forgot to tighten a bolt on the torque arm. ...so hopefully problem solved.. but, jeez, w/ all the racket it made, it sounded as if the tranny was loose and going to fall out!

    thanks for all your inputs/replies!
    i'd unbolt it and take a look at the bolt holes... the stockers are weak and flimsy... i bet the banging around made the bolt holes into ovals...

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    tranny mount

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    None Shall Pass Knight's Avatar
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    Quote Originally Posted by Spaz View Post
    i'd unbolt it and take a look at the bolt holes... the stockers are weak and flimsy... i bet the banging around made the bolt holes into ovals...
    This.

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    Member mikey gavin's Avatar
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    same thing happened to me i thought i exploded the tranny er the motor or something. it turned out to be u joint came apart

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