SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 If it's a twin plate clutch and none stock flywheel the box WILL chatter. Period. If it should be an internal fault it's a weird one, as it's not a typical gearbox noise. layshaft bearing wear MIGHT cause it. I'll bet it's fine though, and it's the clutch assembly and flywheel combination. I'd live with it and see what happens Hmm...yeh ok thanks chris. If it was a bearing fault then i would be p*ssed off that the technicians missed it! Come to think of it, i did ask them about the bearings and they said "no thats ok, doesnt need fixing". I mean, the gearchange, is as smooth as can be but a little clunky and agricultural at times... Like you said though, i'll give it time and then see what happens... Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 Can the people who rebuilt the gearbox can tell you exactly what clutch & flywheel you have in. No unfortunetely not jevansio. I asked about my flywheel and clutch and the technician thought it was standard but "cant tell without inspection"... Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 If it's a twin plate clutch and none stock flywheel the box WILL chatter. Period. If it should be an internal fault it's a weird one, as it's not a typical gearbox noise. layshaft bearing wear MIGHT cause it. I'll bet it's fine though, and it's the clutch assembly and flywheel combination. I'd live with it and see what happens However, i should mention though, when the gearbox is cold, it doesnt chatter that much but when its up to temp, you can clearly hear it! Inside and outside of the car! If it is the flywheel/clutch combination, why does the chatter stop when my foot is placed 3/4 of the way on the clutch?? Is it because the clutch/gearbox is underload???? Quote Link to comment Share on other sites More sharing options...
bignum Posted April 26, 2008 Share Posted April 26, 2008 Sounds like a dodgy release bearing to me. Quote Link to comment Share on other sites More sharing options...
and1c Posted April 26, 2008 Share Posted April 26, 2008 However, i should mention though, when the gearbox is cold, it doesnt chatter that much but when its up to temp, you can clearly hear it! Inside and outside of the car! If it is the flywheel/clutch combination, why does the chatter stop when my foot is placed 3/4 of the way on the clutch?? Is it because the clutch/gearbox is underload???? Do you mean with your foot 3/4 down to the floor on the clutch, or nearly at the top of the travel releasing the clutch? If you mean with clutch engaged its because effectively pressure plate is disengaged Quote Link to comment Share on other sites More sharing options...
D8MOA Posted April 26, 2008 Share Posted April 26, 2008 this sounds exactly that same problem as a friend of mine has with his 6 speed. his box has been stripd buy a company twice and that couldnt find the problem... Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted April 26, 2008 Share Posted April 26, 2008 it just sound like you have an aftermarket clutch mate and your worrying over nothing..when it gets hotter it will get more noisy.. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 26, 2008 Share Posted April 26, 2008 It's all sounding perfectly normal, i can either sit here for 10 minutes and explain each facet, or shower and go to the pub. Now what shall i do....? CU Quote Link to comment Share on other sites More sharing options...
jevansio Posted April 26, 2008 Share Posted April 26, 2008 Yeh its heavy-ish Jurgen and its quite snappy too... My stock Supra clutch was anything but heavy-ish & snappy Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 it just sound like you have an aftermarket clutch mate and your worrying over nothing..when it gets hotter it will get more noisy.. Well i hope so Jurgen i really do. The only thing that bugs me is that before when i first got the car and discovered that the gearbox was knackered, it wasnt making noise and when it got fixed, the noise started and never stopped... Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 It's all sounding perfectly normal, i can either sit here for 10 minutes and explain each facet, or shower and go to the pub. Now what shall i do....? CU Haha The only thing that worries me as i said to Jurgen was it wasnt making noise when i first got the car but after when it got fixed, it started and never stopped. Surely, the noise would of been there when i first bought the car because there was nothing whatsoever, just a nice engine note. Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 My stock Supra clutch was anything but heavy-ish & snappy Ah well in that case, it may be an aftermarket clutch then. Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 this sounds exactly that same problem as a friend of mine has with his 6 speed. his box has been stripd buy a company twice and that couldnt find the problem... Oh really?? Was the problem ever diagnosed d8moa?? Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 Do you mean with your foot 3/4 down to the floor on the clutch, or nearly at the top of the travel releasing the clutch? If you mean with clutch engaged its because effectively pressure plate is disengaged Yeh and1c, i mean with my foot pressed down 3/4 of the way down onto the clutch...so basically, load is then transferred onto the clutch and gearbox and can only presume thats why the noise stops... Quote Link to comment Share on other sites More sharing options...
D8MOA Posted April 26, 2008 Share Posted April 26, 2008 Oh really?? Was the problem ever diagnosed d8moa?? nope, twice thay said thay found the problem and twice thay hadnt,also had nothing to do with the clutch as we tryed another gear box to rule out all other possiabiltys, his car drives fine but has the same noise as you decribe and also is speed variant Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 Sounds like a dodgy release bearing to me. No bignum, if it was a dodgy release bearing then there would be a high pitched squel coming from the clutch-i had this problem on my n/a as the clutch wasnt fitted properly... Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 26, 2008 Author Share Posted April 26, 2008 nope, twice thay said thay found the problem and twice thay hadnt,also had nothing to do with the clutch as we tryed another gear box to rule out all other possiabiltys, his car drives fine but has the same noise as you decribe and also is speed variant Hmm ok, does yor friend have a different clutch or flywheel d8moa?? At least im not the only one its happened to lol! Quote Link to comment Share on other sites More sharing options...
D8MOA Posted April 26, 2008 Share Posted April 26, 2008 Hmm ok, does yor friend have a different clutch or flywheel d8moa?? At least im not the only one its happened to lol! nope completly stock mate!!! if you do find the problem let me no please. ime guna do a video clip monday on his car and i will post it hear to see if its the same as yours Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 27, 2008 Author Share Posted April 27, 2008 nope completly stock mate!!! if you do find the problem let me no please. ime guna do a video clip monday on his car and i will post it hear to see if its the same as yours Hmmm...ok mate yeh please post that up as it will be good for comparison... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 28, 2008 Share Posted April 28, 2008 However, i should mention though, when the gearbox is cold, it doesnt chatter that much but when its up to temp, you can clearly hear it! Inside and outside of the car! If it is the flywheel/clutch combination, why does the chatter stop when my foot is placed 3/4 of the way on the clutch?? Is it because the clutch/gearbox is underload???? As the gearbox oil warms up, it thins. The gear train clatter is then more audible as the thin oil doesn't dampen it the same. The stock dual mass flywheel was designed to stop this noise, and allow usage of a none sprung clutch centre plate, which are stronger and more reliable. Once you change the flywheel the noises start. Pressing the clutch 3/4 down alters the harmonics in the drivetrain by partly disconnecting the input shaft of the gearbox from the crankshaft. The engine didn't start life as one from an automatic car, did it? I see examples on Supras and other makes where someone has forgotten to fit, or been ignorant of the need to fit, the input shaft spigot bearing in the back of the crank. The situation would probably be a lot worse than you cite if that was the case though. Why not get an expert with experience of the MKIV with a dual plate clutch, and / or a none stock flywheel fitted to drive it? Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 28, 2008 Author Share Posted April 28, 2008 As the gearbox oil warms up, it thins. The gear train clatter is then more audible as the thin oil doesn't dampen it the same. The stock dual mass flywheel was designed to stop this noise, and allow usage of a none sprung clutch centre plate, which are stronger and more reliable. Once you change the flywheel the noises start. Pressing the clutch 3/4 down alters the harmonics in the drivetrain by partly disconnecting the input shaft of the gearbox from the crankshaft. The engine didn't start life as one from an automatic car, did it? I see examples on Supras and other makes where someone has forgotten to fit, or been ignorant of the need to fit, the input shaft spigot bearing in the back of the crank. The situation would probably be a lot worse than you cite if that was the case though. Why not get an expert with experience of the MKIV with a dual plate clutch, and / or a none stock flywheel fitted to drive it? Good idea chris...if anyone experienced wants to drive my supe including you chris, pm me and we'll sort out a date. Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 28, 2008 Author Share Posted April 28, 2008 Haha The only thing that worries me as i said to Jurgen was it wasnt making noise when i first got the car but after when it got fixed, it started and never stopped. Surely, the noise would of been there when i first bought the car because there was nothing whatsoever, just a nice engine note. This what i have posted here chris, is the only thing that worries me! Quote Link to comment Share on other sites More sharing options...
edge Posted April 28, 2008 Share Posted April 28, 2008 Can you get the car in the air and remove an inspection plate from the box and take a pic for us. ? Its easy to get too, just pop it on some axle stands. Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 28, 2008 Author Share Posted April 28, 2008 Can you get the car in the air and remove an inspection plate from the box and take a pic for us. ? Its easy to get too, just pop it on some axle stands. Not trying to sound silly edge, but where abouts is the inspection plate?? Quote Link to comment Share on other sites More sharing options...
edge Posted April 29, 2008 Share Posted April 29, 2008 See attached pic. If you look at the spline where the clutch assembly sits you can see a rectangular hole though the side of the front of the box. There are two of these, one on each side. Black plates held on with 2 or 3 10 or 12mm bolts i think. I would put an arrow on the areas but im no good at that pc stuff. Anyone feel free to adj the pic. Quote Link to comment Share on other sites More sharing options...
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