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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.
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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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.
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.
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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That hunk of junk? Yeah, well I've made a few special modifications to that yellow 99 Gt, it makes the Kessel run in 12 parsecs and eats turbo japs and poops chevy's
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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1994 Mustang GT 5.0 HO
(Sold)
2004 Mustang GT
5spd, KnN CAI kit, Accufab 75mm TB & Plenum, Tri-Ax Short Throw Shifter, BBK Underdrive Pullies, Ford 30lbs injectors
2006 Yamaha R6 Raven
Blacked out winshield, Framsliders, Dynojet Power Commander III, smoked integrated tail light, licence plate delete, new racing sproket, front turn signals hid.
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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That hunk of junk? Yeah, well I've made a few special modifications to that yellow 99 Gt, it makes the Kessel run in 12 parsecs and eats turbo japs and poops chevy's
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?
Strange noise when pushing hard... 
