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Old 11-15-2008   #1 (permalink)
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Default Strange noise when pushing hard...

when im accelerating hard i get this strange noise that almost sounds like something rattling. it isnt noticeable in 1st or 2nd but you can really hear it in 3rd. i cant hear it when im just revving it in neutral so i dont think it's something to do with my engine. it really doesnt alter my cars performance but its starting to make me worry. any help would be great. thanks.
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Old 11-15-2008   #2 (permalink)
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You're going to have to be more specific than just a rattle under hard acceleration. There's a whole lot of stuff that could cause that scenario.
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Old 11-15-2008   #3 (permalink)
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i shouldnt say "isnt noticable in 1st or 2nd". it is not present in first or second. i havnt really tryed 4th because i really never go for top end speed. going fast is one thing but accelerating is a whole different world for me.
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Old 11-15-2008   #4 (permalink)
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ill try to get a clip for you guys once the weather clears up around here.
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Old 11-15-2008   #5 (permalink)
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something inside my deiver door near the lock rattles when my radio is on. drives me nuts!
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Old 11-15-2008   #6 (permalink)
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sounds like lose exhaust or a heat sheild on your exhaust. jack up your car and start hitting it in a few places. its probably just a lose bolt.
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Old 11-15-2008   #7 (permalink)
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Maybe something is wrong with your speedometer cable. I am replacing the one in my 1966 today, because it would start to rattle when the trans shifted into second (its an automatic) and it would rattle under hard acceleration.
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Old 11-15-2008   #8 (permalink)
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my speedometer is electronic so i dont think that would be an issue. thanks for the input though.
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Old 11-15-2008   #9 (permalink)
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Yeah, he doesn't have a speedo cable. Might be a spot weld in the exhaust heat shields, but from your description its hard to make a good guess other than the common things. You should also check the sheet metal plate between the engine and trans, sometimes that develops a high speed rattle.
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Old 11-15-2008   #10 (permalink)
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could it be detonation your hearing.
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Old 11-15-2008   #11 (permalink)
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no it definitely isnt detonation. its much quieter than pinging and doesnt have the same tone to it.
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Old 11-15-2008   #12 (permalink)
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its supposed to be nice here from monday-on so like i said ill get a clip for you guys
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Old 11-17-2008   #13 (permalink)
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hey my car does that too... i dont think its a timming thing, it rattles when im going like 80 then put it in 3rd and stepp on it. let me know what you find out, might be the same thing
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Old 11-17-2008   #14 (permalink)
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That may be the shifter rattling, you can try taking it out and lightly greasing the pivot ball, but if its only in the upper gears under hard acceleration I think its coming from the shifter. You can also check the trans mount.
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Old 11-17-2008   #15 (permalink)
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racin you're right. it was rattling and i put some pressure on the shifter and it stopped instantly. after i get the procharger im going to get an mgw short throw so i can deal with the noise until then. thanks for the input guys! and trent i see you have the tri-ax. did you use silicone sealant when you installed it?
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