I was reccomended today that i put a thicker transmission fluid in my 2001 it was also reccomended that I use synthetic and go with a thicker fluid. Has anyone done this or heard of anyone doing this. I also heard that this will quite down the noise heard from the transmission while accelerating and reduce vibration in the transmission

Darren do you still have a vibration?...........:patriot:

Hey darren :cheers: All manual transmissions in Corvette, since 1997 have Dexron 3 automatic transmission fluid in them.
I stand by these recommendations.

"I was reccomended today that i put a thicker transmission fluid in my 2001 it was also reccomended that I use synthetic and go with a thicker fluid. Has anyone done this or heard of anyone doing this. I also heard that this will quite down the noise heard from the transmission while accelerating and reduce vibration in the transmission"
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Why was this recommended? If you are hearing tranny noises the first thing to do is drain it and see what comes out, slivers and metal dust are usually normal but if chunks and pieces come out the tranny needs to be rebuilt and no type of fluid will really help it much.

yes blackhorse I still have the vibration. I was in the process of taking blu's advice so i called spec to see how there warrenty works. I don't have the money to just pull out my parts and send them to a machine shop so It's there clutch and flywheel so I would expect them to do any checking required. I talked to josh at maryland speed and also. Josh didnt think it was a pressure plate and flywheel issue. I disagreed and explained the entire problem in detail. He still didnt believe that it was out of balance. I then called spec and talked to jeremy. We talked for ruffly 25 minutes or so. After explaining everything. The small vibration at idle. vibration is in every gear to include netruel and the worse @ 2000 +/- 250 rpm. Worse on decel then on accel. He asked me if there was any noise involved. there is but the noise has somewhat always been there. The kind of noise you would get if you were to take off in 3rd gear but now with a slight vibration heard in that noise. He asked me to walk out to my car and start it. He told me to push in the clutch. By doing that i took pressure of the flywheel and the noise decreased. The vibration was the tiniest bit better but still there. He then tells me he still don't believe that its the fw and pp. his reasons being if it was out of balance or round the vibration would get worse the higher the rpm. he also believes that while the clutch is engaged it being louder and having more vibration would lead him down to the xmsn. Also he said the an aluminum flywheel does not have the same vibration dampening charecteristics as steal "I know from my experence as a helicopter mechanic dealing with dynamic components and the track and balance of rotor systems that the faster somthing spins if it has a vibration it will normally be worse at the high end and also that density will play a part in vibration suppression. He reccomended that i change out the xmsn fluid to a sysnthetic and somthing that might be thicker as it would help dampen and xmsn vibration. He also reccomended just checking everything that went into the install of the torque tube and exhaust as anything lose with those could cause vibration. He did agree that if i sent him the fw and pp he would have the balance checked but I would have to ship it wait for it to be checked and then either it being sent back to me or a new one being issued.

I have concluded that I would ask about differnt fluids being used i have also done searches on smokinvette and that horrible thing they call a forum over there and found a considerable amount of people with the exact same problem. Not always in the same rpm range but the same problem after the install of a new pp and fw. Some were able to replace the assy with a differnt brand and resolve the problem others had there set up rebalanced and it was fine. One fella said he has driven his for 12,000 miles and it has gotten slightly better over time but nothing has gotten worse. I have emailed a few people about opinions and options and trying to find a local machine shop that may be able to check it if i remove it. I also ordered another new pilot bearing and slave cylinder with t/o just to be safe if i decide to pull it. I have also started looking at differnt fluids that can be used with a 2001 6 sp.

"I was reccomended today that i put a thicker transmission fluid in my 2001 it was also reccomended that I use synthetic and go with a thicker fluid. Has anyone done this or heard of anyone doing this. I also heard that this will quite down the noise heard from the transmission while accelerating and reduce vibration in the transmission"
__________________
Why was this recommended? If you are hearing tranny noises the first thing to do is drain it and see what comes out, slivers and metal dust are usually normal but if chunks and pieces come out the tranny needs to be rebuilt and no type of fluid will really help it much.


Oh and i agree slicktop if a chunk of metal was to come out that would be bad. Sorry i didn;t know that I for sure don't work on million dollar aircraft with multiple gear boxes

Hey darren :cheers: All manual transmissions in Corvette, since 1997 have Dexron 3 automatic transmission fluid in them.
I stand by these recommendations.


Thanks blu I have been a real busy guy and was going to have my wife run it to the stealership on monday and have it changed while I was at work but they said they only use mobil1 full syn now.
said thats all they use. Did some publication change come out for them or is that just my local dealer trying to sell a more expensive product?

yes blackhorse I still have the vibration. I was in the process of taking blu's advice so i called spec to see how there warranty works. I don't have the money to just pull out my parts and send them to a machine shop so It's there clutch and flywheel so I would expect them to do any checking required. I talked to josh at Maryland speed and also. Josh didn't think it was a pressure plate and flywheel issue. I disagreed and explained the entire problem in detail. He still didn't believe that it was out of balance. I then called spec and talked to Jeremy. We talked for ruffly 25 minutes or so. After explaining everything. The small vibration at idle. vibration is in every gear to include neutral and the worse @ 2000 +/- 250 rpm. Worse on decile then on accel. He asked me if there was any noise involved. there is but the noise has somewhat always been there. The kind of noise you would get if you were to take off in 3rd gear but now with a slight vibration heard in that noise. He asked me to walk out to my car and start it. He told me to push in the clutch. By doing that i took pressure of the flywheel and the noise decreased. The vibration was the tiniest bit better but still there. He then tells me he still don't believe that its the fw and pp. his reasons being if it was out of balance or round the vibration would get worse the higher the rpm. he also believes that while the clutch is engaged it being louder and having more vibration would lead him down to the xmsn. Also he said the an aluminum flywheel does not have the same vibration dampening characteristics as steal "I know from my experience as a helicopter mechanic dealing with dynamic components and the track and balance of rotor systems that the faster something spins if it has a vibration it will normally be worse at the high end and also that density will play a part in vibration suppression. He recommended that i change out the xmsn fluid to a synthetic and something that might be thicker as it would help dampen and xmsn vibration. He also recommended just checking everything that went into the install of the torque tube and exhaust as anything lose with those could cause vibration. He did agree that if i sent him the fw and pp he would have the balance checked but I would have to ship it wait for it to be checked and then either it being sent back to me or a new one being issued.

I have concluded that I would ask about different fluids being used i have also done searches on smokinvette and that horrible thing they call a forum over there and found a considerable amount of people with the exact same problem. Not always in the same rpm range but the same problem after the install of a new pp and fw. Some were able to replace the assy with a different brand and resolve the problem others had there set up rebalanced and it was fine. One fella said he has driven his for 12,000 miles and it has gotten slightly better over time but nothing has gotten worse. I have emailed a few people about opinions and options and trying to find a local machine shop that may be able to check it if i remove it. I also ordered another new pilot bearing and slave cylinder with t/o just to be safe if i decide to pull it. I have also started looking at different fluids that can be used with a 2001 6 sp.
Well if it did not have a vibration be for I would pull PP & Fw out sent it back I know it would be a bi(h then I would do a oil sample on the trans. .A heavier fluid would make the noise a little quiter but that not right .I would use what goes in it .............:patriot:

Hey darren :cheers: All manual transmissions in Corvette, since 1997 have Dexron 3 automatic transmission fluid in them.
I stand by these recommendations.

I have not and will not veer off this recommendation!

yes blackhorse I still have the vibration. I was in the process of taking blu's advice so i called spec to see how there warrenty works. I don't have the money to just pull out my parts and send them to a machine shop so It's there clutch and flywheel so I would expect them to do any checking required. I talked to josh at maryland speed and also. Josh didnt think it was a pressure plate and flywheel issue. I disagreed and explained the entire problem in detail. He still didnt believe that it was out of balance. I then called spec and talked to jeremy. We talked for ruffly 25 minutes or so. After explaining everything. The small vibration at idle. vibration is in every gear to include netruel and the worse @ 2000 +/- 250 rpm. Worse on decel then on accel. He asked me if there was any noise involved. there is but the noise has somewhat always been there. The kind of noise you would get if you were to take off in 3rd gear but now with a slight vibration heard in that noise. He asked me to walk out to my car and start it. He told me to push in the clutch. By doing that i took pressure of the flywheel and the noise decreased. The vibration was the tiniest bit better but still there. He then tells me he still don't believe that its the fw and pp. his reasons being if it was out of balance or round the vibration would get worse the higher the rpm. he also believes that while the clutch is engaged it being louder and having more vibration would lead him down to the xmsn. Also he said the an aluminum flywheel does not have the same vibration dampening charecteristics as steal "I know from my experence as a helicopter mechanic dealing with dynamic components and the track and balance of rotor systems that the faster somthing spins if it has a vibration it will normally be worse at the high end and also that density will play a part in vibration suppression. He reccomended that i change out the xmsn fluid to a sysnthetic and somthing that might be thicker as it would help dampen and xmsn vibration. He also reccomended just checking everything that went into the install of the torque tube and exhaust as anything lose with those could cause vibration. He did agree that if i sent him the fw and pp he would have the balance checked but I would have to ship it wait for it to be checked and then either it being sent back to me or a new one being issued.

I have concluded that I would ask about differnt fluids being used i have also done searches on smokinvette and that horrible thing they call a forum over there and found a considerable amount of people with the exact same problem. Not always in the same rpm range but the same problem after the install of a new pp and fw. Some were able to replace the assy with a differnt brand and resolve the problem others had there set up rebalanced and it was fine. One fella said he has driven his for 12,000 miles and it has gotten slightly better over time but nothing has gotten worse. I have emailed a few people about opinions and options and trying to find a local machine shop that may be able to check it if i remove it. I also ordered another new pilot bearing and slave cylinder with t/o just to be safe if i decide to pull it. I have also started looking at differnt fluids that can be used with a 2001 6 sp. I have personally seen there Balanced pressure plates and flywheels stating that they come shipped balanced from the factory and a lot of them have not run true upon fixing this all was good, bottom line building a motor can be difficult always double check someone elses claims or work ahead of time before install for piece of mind, good luck to you bro youll get it i have no doubt and im not buying into the fluid change

I have personally seen there Balanced pressure plates and flywheels stating that they come shipped balanced from the factory and a lot of them have not run true upon fixing this all was good, bottom line building a motor can be difficult always double check someone elses claims or work ahead of time before install for piece of mind, good luck to you bro youll get it i have no doubt and im not buying into the fluid change

I have one question blu and this is the one thing that the spec guy said that made since. if it was out of balance wouldnt it just get worse with rpm increase? My plan is to take it out and have it checked locally and replace the pilot bearing again and the slave just to be safe. Also with the slave a t/o bearing

Sent you a pm bro:thumbsup:

I think that your problem could easily be the transmission which is what the experts also told you. Normally clutches last a long time unless the car is hotrodded. You have had to replace yours and the same force that knocked the clutch out also could have easily damaged the input and countershaft bearings in the transmission causing your noise and vibration. If they are damaged they will throw metal parts and those parts will come out the drain hole or be stuck to the drain plug if it is magnetic. When a problem arrises such as yours the first thing to do is to drain the tranny and check for transmission damage by seeing what comes out. Costs nothing to do, but it must be done before you move on to all the guessing you are doing........When troubleshooting always check the easiest and cheapest things to do first:thumbsup:

It would be silly to take the clutch and flywheel out without even checking the transmission for internal damage first ...........