Wierd knocking noise... any ideas?

Jim_rx7 · April 05, 2007, 05:12:34 PM

Ok...

My car sort of bounces a bit at 30pmh in 4th when cold. Someone suggested it could be the diff mounts. (I\'ve still to get this checked out).

I noticed when coming to a standstill sometimes I hear a clunk sound as if something is moving forward and clunking.

Anyone got any ideas? Could it be the diff mounts? Kinda sounds like what calipers sound like if they\'ve stuck and you drive and they pop off (if that makes sense?).

Anyone got any clever ideas?

cheers!

interloper393 · April 05, 2007, 05:36:32 PM

is it your calipers lol they tend to bind a bit if not used very moocho..

Jim_rx7 · April 05, 2007, 06:09:18 PM

I thought that... but not too sure tbh.

shaggy · April 05, 2007, 09:59:57 PM

Have you looked under the car. Get it jacked up and poke around a bit. Don\'t forget to axle stand it though!!

mikeyh · April 05, 2007, 10:30:13 PM

Quote from: interloper393is it your calipers lol they tend to bind a bit if not used very moocho..

oh did i not tell you that lol

TonyC · April 05, 2007, 10:30:44 PM

Sounds like the propshaft joints are worn, but may be diff mounts or similar.

Jim_rx7 · April 05, 2007, 10:40:36 PM

Quote from: TonyCSounds like the propshaft joints are worn, but may be diff mounts or similar.

If it us the prop shaft joints, what\'s needed to be done to resolve it?

Diff mounts easy enough fix.

Jim_rx7 · April 05, 2007, 10:41:09 PM

Quote from: shaggyHave you looked under the car. Get it jacked up and poke around a bit. Don\'t forget to axle stand it though!!

not yet mate.

interloper393 · April 05, 2007, 10:43:55 PM

Quote from: mikeyhoh did i not tell you that lol

No i dont think you did

mikeyh · April 05, 2007, 10:45:43 PM

o i think i did wen u called about ur car not running right

lol

interloper393 · April 05, 2007, 10:47:43 PM

ma wheel fell off tho lol.. well close to it cus of that nasty person in japan :S

TonyC · April 06, 2007, 11:31:26 AM

Quote from: Jim_rx7If it us the prop shaft joints, what\'s needed to be done to resolve it?

Diff mounts easy enough fix.

Speaking from other RWD car experience: the prob usually connects to the gearbox output shaft and the diff by two universal joints (I\'[ve not yet looked under the Rx to see exactyl what is under there but it must be someting similar). These UJ\'s do wear and can move in the bearings makeing a knocking noise. Often this is heard when you run really low rvs in a high gear.
usually the fix is pretty easy, undo the bolts hlding the uj to diff and gearbox (depending which end is worn), the remove the Uj from prob, then bolt new one and bingo.
It would bea half hour job on my last car.

when you look underneath check the joints on the prob shat for movement.

Jim_rx7 · April 06, 2007, 02:46:24 PM

Cheers mate, will get it looked at soon.

Jim_rx7 · August 14, 2007, 07:08:39 PM

How much are these universal joints for the prop shaft? Where can I get them?

marky · August 14, 2007, 07:50:47 PM

I\'d be intersested in knowing this to. Mine knocks at low revs and also on down shifts usually from 4th to third when the revs drop

Regards

Mark