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I have an 02 civic with modifications and as of right now i work so much that I just don't have the time to diagnose my issue and would like some opinions from members who would undoubtedly know more than myself.

The issue I am having is the occasional high rpm/no acceleration, loud grinding noise coming from what appears to be the clutch or transmission.

Just a few days ago everything was fine until I had a direct short from my battery to my the body of the car in the trunk causing the battery to ignite and burn a bit until i put it out.

Since then I have been having the issue i mentioned above, this youtube video sounds exactly like the sounds i hear and it happens just as he explains it.

(sorry if outside links are not allowed)

A question for those who are more experienced than I, is it possible for electrolysis to occur and possibly destroy one of my sensors such as the maf, tps, etc or possibly flow so hard it burned up a bearing in the transmission.

I am an electrician and to my understanding dc power takes the least path of resistance and therefore should only shock/heat up the location in which direct contact is made, so i doubt it could be the reason.

I myself am leaning towards the input shaft bearing being no good or possible sensor failure leading to my problem.

apologies for such a long post and thanks in advance.

 
Rep Power: 519

When is the last time anyone was under the car?
Trans fluid leaked out?
Is the trans full or low?
Ever been checked or serviced?
Too late to save it, the damage is already done.

The noise is the bearings in the trans, at the very least.
Hard to tell what else from a video playing on this crummy laptop.
Sounds like at least the input shaft bearings, but really can't tell how many others might be bad or if anything else might be damaged without a teardown and inspection.
I'd also say ASAP on that, it sounds awful.
The deceleration noise makes me think a shaft or something is "walking" that shouldn't be. Hope there isn't case damage from a really bad bearing and/or low fluid.



Ummmm, no fuse protection at the battery on that hot cable to the trunk?
That's how many kids burn their cars to the ground here.



HTH

 
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fluids are there, no damage under the car to frame or mechanical, no holes in the exhaust, etc.

i hope this is a question like the above and not a statement saying it is too late, i would be aggravated to say the least.

it makes that sound when accelerating, never when i use the clutch.
i don't drive it, it sits until i can get to work on it.

i was thinking to myself and hoping that the main shaft or counter shaft aren't warped.

if it isn't that bad i will replace all the bearings.

if the transmission is in fact toast, i am guessing any 7th gen transmission can be used as replacement.

there is a fuse, only issue is it was a 250 amp fuse which is pointless considering there is nothing in, on or around that vehicle that would ever trip that fuse.

i thought i had put a 50 amp and i put a 250 amp, i can be a dumbass sometimes.

 
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at another forum, someone mentioned that it could possibly be the alternator considering it is tied in with that battery that had the direct short.

 
Rep Power: 519

I was implying that if the fluid was low, the damage to the bearing(s) has already been done....merely refilling the fluid couldn't fix the noise. But you say it is full..

No matter what, the bearing noise won't heal itself. The trans needs to come apart to fix it.


It's been my experience that as long as nothing solid tried to go between 2 gears, and as long as a bearing didn't fall apart and allow gear teeth to skip, the shafts will measure straight within allowable specs.

There are different gear ratios. They are not all the same.



What does your electrical theory say about that? Hmmmm?
(Not possible IMO.)




An alternator wouldn't care if you push the clutch pedal or not.
The noise is in the trans.


I love seeing cars with huge 2/0ga cable the size of something the freekin' power company should use, with a little 40 amp fuse on it. And an amp that uses an even smaller fuse.

Even better is the kids that snake their cables through the fenders and door jambs with no fuses. THOSE scare the crap out of me. I don't want it to burn to the ground on MY test drive.

 
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i know that if it is in the trans it will need to come out and i know exactly how to get it out.

if the bearing is spun or no good you are right, no amount of fluid could fix that and i have planned to replace all the bearings at the same time and to make sure they are staked down.

when you said too late to save it... i damn near had a stroke thinking you were speaking of the car in general.

alright then if the trans is somehow shot, which i don't think it is because it shifts with no problems i'll remember that not all 7th gens are compatible.

i really didn't think it was the alternator myself, just throwing out what someone else had mentioned.

i have a standard terminal wire running from the battery to the fuse box under the hood.

i don't know about what these kids do, i am not a kid and the only wire that spans the length of the vehicle regarding modifications is the terminal wire.

this weekend i'll have to pull the trans and take a look inside and fix the problem.

appreciate the help and opinions fellas.