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Old 27 Nov 2009, 11:16 pm
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Default 1999 civic with grinding noise from transmission, replaced tranny but still have issues.?

Transmission was noisy and metal particles were found in the pan. The tranny was replaced and the issues continue, while stepping on gas there is no noise but when the pedal is let go a noise is heard like a fan hitting on metal or something similar, please help with diagnostic. Thanks (manual t.)















I assumed it was in the pan but nevertheless there was metal in the fluid. the "new" tranny was taken apart to check everything and it is fine.
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Old 27 Nov 2009, 11:31 pm
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flywheel?? or clutch assembly?
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Old 27 Nov 2009, 11:46 pm
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manual transmission dont have a pan. you shouldve open up the first tranny and see whats wrong but before you even replace it you must check:















flywheel















clutch















pressure plate















throwout bearing















pilot bearing















shift linkage















shift fork















your spline shaft from the transmission















did you put manual transmission oil in it?
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Old 28 Nov 2009, 12:01 am
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This may sound off the wall, but try bleeding the coolant (that nipple on the top of the thermostat housing) and making sure the radiator is full. My daughter's (automatic) Accord made a squalling noise when she lifted the throttle, and it must have been air in the water pump. When I got the air out of the coolant the noise stopped. Before that it sounded like a bad bearing.































My only other thought is that during the swap an engine mount may have been stressed a bit too much and has broken. A visual inspection would settle that.
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Old 28 Nov 2009, 12:16 am
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have you checked the axles? has the car been wrecked? are you sure its coming from the Trans? does it do this in reverse?
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Old 28 Nov 2009, 12:31 am
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Most likely it's not a problem with the transmission if you put in a new one and it was PROPERLY installed. It's normal for metal shavings to be found at the bottom of transmissions, it's just from normal wear and tear over time."while stepping on gas there is no noise but when the pedal is let go a noise is heard like a fan hitting on metal or something similar"















Sounds like it could be coming from an internal part in the engine. You may not be hearing it when the gas is pressed because of the engine noise and road noise drowning it out. The best DIY way to locate the source is to:















1. Securely place the car on at least 2 jack stands (NOT just a jack, and only raise the front of the car since it's FWD). I always use 4 or at least 2 and the jack as well when I'm running the engine and it's lifted. Also the tire changing jack that came with the car does not count.















2. Place wheel stops or wood blocks behind the rear wheels to keep it from rolling.















3. Start the engine and put it in first gear and slowly let the clutch out, the front wheels will slowly begin to turn as you let the clutch out. (This will get all the parts in the transmission and engine moving as if you were on the road.)















4. Next get a stethoscope and start placing it on the motor/tranny and try to listen for the noise your hearing and pin-point the location it's coming from. This will help you save money so your not replacing questionable parts and you will have a better idea of what the cause could be and where it's coming from.































If you find it coming from the motor you need to get it looked at asap, it could be the beginning of piston slap or valve knock.
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