wierd rattling when starting from a stop

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Ace
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Ok well never let your friend drive your car. I learned this the hard way and my car was very close to being totaled today. All my work would have been wasted. Anyway luckely the car came out fine except for one thing that I have noticed thus far. When I take off from a stop I hear a wierd type of rattle/rumble from the driveshaft area. I have discussed it with my dad and we are going to tackle the problem tomorrow, but I am very antsy and was wondering if you guys had any ideas. I believe it could maybe be a problem with the driveshaft, or maybe the transmission mount or possible but I doubt it but maybe a motor mount. I don't have the nismo mounts. Anyway it sort of sounds like a chatter/ rattle. I have a 6 puck clutch in my SR and have had it running for 6 months so I don't think its the clutch. What are your guys thoughts?


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quiksilvia
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what happened to the car?

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Ace
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Well nothing happened except for the rattling as far as I can see. Heres what happened.

My friend who is usually a really good driver and he races motocross was driving my car through the backroads of my town. They are really windy and there are many points where you can get off camber easily. He was going like 70 in a really small area that has a 25 mph speed limit. He went up a small hill and was getting sideways a bit then the hill dropped back down and he lost control and the car pitched the rear out to the right and went off the road with the rear right tire and we sounded like we hit something (but later concluded that we just probably bottomed out. We narrowly missed a fire hydrant, then the car spun around and we were heading for a telephone pole and some mail boxes backwards. (Opition videos flashed before my eyes and I pictured when there was a S14 that crashed) I couldn't even speak I just sat there and waited for the demolition. But luckely the brakes came to life in the rear when my friend applied more pressure. So we stopped. Then we got out of there and got to his place and reviewed the car and it looked fine. Thank god no one was hurt or anything was seriously damaged. We went back with his truck and saw the tire marks wow we were lucky.

BTW fool me once shame on you fool me twice shame on me. No one but me and my dad are going to drive my car again. Thats for sure I don't care how good of a driver you think you are.:thinker

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quiksilvia
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what if your dad goes psyco and tries to drift? that kind of a spin out thing where a lot of stress is put on the frame and susp etc isnt the best thing, if u can, get the car up and get under and check out the susp and what not, as far as a rattling from the driveshaft...im not sure, check it out too when ur under the car

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Ace
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Yeah I don't think my dad will do that. Also this just makes me realize why I save my aggressive driving for Auto X and gymakamas, and I hope drift events when they start to come to Washington. Anyway the car is already in the air and I looked at the rear suspension and it looks fine. I am going to run pull the e-brake and start to let the clutch out while the car is in the air tomorrow to create a load situation and have my dad look under and see what is making the noise.

Anyway I plan on getting the car alligned just to be safe even though it seems to drive fine and straight. This is my best friend who was driving so I am not going to screw him if it was someone I disliked I would claim that the suspension was all f'd up and I needed new components then I would go get all JIC components.

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Ace
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Well after a good amount of inspection we are leaning toward the driveshaft being the problem. The center section where the two driveshafts connect has a lot of play in the bushing. Is that normal, are the stock driveshafts prone to failure. Also it isn't just when you start in first it does it when a load is put on the car like just starting in reverse or downshifting. So lets hear it.

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GEO
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****ING stupid people, going 70 in a 25 zone. ****ING stuipid, why woud you let someone else drive your car if youa re able to? So dumb dude. How old are you btw? going like 70 down a hill, I wish your car totaled, maybe knock some sense into your brain.

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Ace
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Have any of your friends asked to drive your car? Have you ever let them drive for a few minutes. I do deserve the stupid comments and I realize that. The car doesn't deserve to be totaled thats for sure. I am almost 21 btw. I drive safe on the streets and I race safely on the track. Trust me I have learned my lesson. Also I can't really describe the road properly it wasn't down hill. It was a windy backroad with ups and downs but that doesn't excuse the actions. Don't preach to me though when there are people street racing going 100+ on streets that are 30 mph.

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GEO
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I realize ace, but when my friends ask to drive my car. I give them the big, " NO". Only time anyone not in my family wold drive my car is if I was shot in the chest and needed to get to the hospital or I was unable to drive to get to teh hospital. If anyone would be to drive, it would be on normal streets. DID you tell him to slow down?

Got_Nissan?
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sound sort of like a idling diesel engine?

Might be your throw out bearing

GroundZero
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is the noise at a certain rpm? my s13 made a sound that sounded like a chain saw at 3k, i later found out that the heat shielding on my exhaust had come loose and was the source of the noise. i removed it and the sound stopped

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quiksilvia
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apparently mr vengeance = god. dude, vengeance you need to calmate. what he does is up to him and he can deal with the consequences, advice is welcome, but not if ur gonna be an ahole

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D-UNIT
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After I changed my motor mounts I noticed a strange rattle too. Checked everything but couldn't find anything wrong. It only happens on starting outs and high gear low rpms. When I swapped in my lsd I found the problem. You can't tell by just looking at, cuz its away and not moving but your exhaust is probably hitting your diff ever so slightly. Start your car up cold and move your muffler around, you might hear that pesky rattle.

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fiznat
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yeah I was gonna say check your exhaust system as well... most common place for rattles under the car....

best thing to do is like you said... just start it up, put it under a load, and see if you can get it to make that sound again-- then hunt it down.

I had a thumping sound coming from my rear end all day today till I started to take the wheels off to take a look at what was going on... turned out my lug nuts were only on like finger tight... that's the last time I trust a certain person to torque those suckers down...

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Ace
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Well I talked to Jeff at Heavy Throttle and he said that the center carrier bearing in the driveshaft is prone to fail someti mes. I have one in nice shape that came in my motor set from a 180SX. I will swap them tomorrow. I checked the exhaust first thing and that wasn't the problem. The driveshaft is the main target and if it turns out to not be the problem then the differential will be the next target. Thanks for the advice fellas.

BTW he was not piping the car he was in low rpms in 3rd. That is an area where cars go fast, but my car is different that most of the other cars around here. So my friend wasn't really used to it and now he realizes that not all cars handle things the same. A valuable lesson by both parties.


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