StormB Posted May 15, 2021 Share Posted May 15, 2021 (edited) Hi all, I think I may have a bad input shaft bearing. It makes a rattling sound which only stops when I press the clutch in. Does anyone know if there's a way that I can stop or reduce the noise temporarily until I can get it fixed? I don't have a whole lot of knowledge in this area but would a thicker trans fluid help? Edited May 15, 2021 by StormB Link to comment Share on other sites More sharing options...
norutah Posted May 15, 2021 Share Posted May 15, 2021 Hi all, I think I may have a bad input shaft bearing. It makes a rattling sound which only stops when I press the clutch in. Does anyone know if there's a way that I can stop or reduce the noise temporarily until I can get it fixed? I don't have a whole lot of knowledge in this area but would a thicker trans fluid help?Sounds like it may be that your TOB is shot and continued use may damage the snout. If corrected early enough, an oversized TOB and snout repair sleeve is possible. Eventually it can damage snout beyond repair. This is just my opinion, hopefully some of the more knowledgeable members will post up for you Sent from my HD1925 using Tapatalk Link to comment Share on other sites More sharing options...
StormB Posted May 15, 2021 Author Share Posted May 15, 2021 Sounds like it may be that your TOB is shot and continued use may damage the snout. If corrected early enough, an oversized TOB and snout repair sleeve is possible. Eventually it can damage snout beyond repair. This is just my opinion, hopefully some of the more knowledgeable members will post up for you Sent from my HD1925 using TapatalkAwesome thanks for the info, do you know if there's a way to check whether it's the TOB or ISB? Some people think its the ISB and others think it's the TOB so I'm unsure which info to go off but the clutch was replaced by the previous owner about 2 years ago and I also read that a bad TOB only makes noise when the clutch is pressed, the noise I'm hearing only sounds when the clutch is not engaged so I thought it was more possible that it's the ISB. Sent from my SM-G973F using Tapatalk Link to comment Share on other sites More sharing options...
Max Capacity Posted May 15, 2021 Share Posted May 15, 2021 (edited) Let's think about this, The clutch disc is splined to the tranny input shaft. In neutral, foot off the clutch pedal, the clutch disc is not spinning as the input shaft is free to stop spinning with the crankshaft, remember the pilot bearing supports the front of the input shaft. The Pressure plate is bolted to the flywheel and always spins when the engine is running. With your foot off the clutch pedal the PP is putting pressure in the clutch disc forcing it to spin the input shaft. The TOB is not spinning at that time. So when you push on the clutch pedal which forces the TOB to release the clamping pressure on the clutch disc allowing the input shaft to stop spinning. I don't know if the cocktail of tranny fluid, look up "uncle scotty's cocktail" Edited May 15, 2021 by Max Capacity 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
norutah Posted May 15, 2021 Share Posted May 15, 2021 Let's think about this, The clutch disc is splined to the tranny input shaft. In neutral, foot off the clutch pedal, the clutch disc is not spinning as the input shaft is free to stop spinning with the crankshaft, remember the pilot bearing supports the front of the input shaft. The Pressure plate is bolted to the flywheel and always spins when the engine is running. With your foot off the clutch pedal the PP is putting pressure in the clutch disc forcing it to spin the input shaft. The TOB is not spinning at that time. So when you push on the clutch pedal which forces the TOB to release the clamping pressure on the clutch disc allowing the input shaft to stop spinning. I don't know if the cocktail of tranny fluid, look up "uncle scotty's cocktail"I think I'm following. So, not the TOB? Sent from my HD1925 using Tapatalk Link to comment Share on other sites More sharing options...
StormB Posted May 17, 2021 Author Share Posted May 17, 2021 Let's think about this, The clutch disc is splined to the tranny input shaft. In neutral, foot off the clutch pedal, the clutch disc is not spinning as the input shaft is free to stop spinning with the crankshaft, remember the pilot bearing supports the front of the input shaft. The Pressure plate is bolted to the flywheel and always spins when the engine is running. With your foot off the clutch pedal the PP is putting pressure in the clutch disc forcing it to spin the input shaft. The TOB is not spinning at that time. So when you push on the clutch pedal which forces the TOB to release the clamping pressure on the clutch disc allowing the input shaft to stop spinning. I don't know if the cocktail of tranny fluid, look up "uncle scotty's cocktail"So which part do you think it could be? I think I forgot to mention that the rattling noise also happens when sitting in neutral with no clutch. Also thanks I'll look into that transmission fluid now [emoji106] Sent from my SM-G973F using Tapatalk Link to comment Share on other sites More sharing options...
MiikaS Posted May 17, 2021 Share Posted May 17, 2021 Could also be that some gear is missing a tooth or part of it etc. When foot off the clutch, input shaft and gears are rotating with engine, so if there is something broken it will make a noise. Link to comment Share on other sites More sharing options...
StormB Posted May 17, 2021 Author Share Posted May 17, 2021 One other thing I noticed was if I put my ear up to the shifter while at idle, I can hear the rattle sound travel up the shifter. Sent from my SM-G973F using Tapatalk Link to comment Share on other sites More sharing options...
StormB Posted May 17, 2021 Author Share Posted May 17, 2021 I heard that "lucas transmission fix" additive will help with a worn out transmission and reduce bearing noise. It says on the bottle that it can be used for all auto transmissions and light duty manual transmissions that require ATF (Auto transmission fluid) gear oil. Does anyone know if I can use this in my manual transmission 03 legacy? Sent from my SM-G973F using Tapatalk Link to comment Share on other sites More sharing options...
Max Capacity Posted May 17, 2021 Share Posted May 17, 2021 Here, I asked google, https://www.google.com/search?q=when+does+the+input+shaft+bearing+spin+in+neutral&sxsrf=ALeKk001dxj64r76fsTnkqRxXLs2YqP7OQ%3A1621259899997&source=hp&ei=e3aiYKjpOfek5NoP1KKR8Ag&iflsig=AINFCbYAAAAAYKKEi-FPlNGPLut2X0eSjSJiyUW9_pWn&oq=WHen+does+the+input+shaft+bearing+spin+&gs_lcp=Cgdnd3Mtd2l6EAEYADIICCEQFhAdEB46EAguEMcBEKMCEOoCECcQkwI6BwgjEOoCECc6BAgjECc6CAgAELEDEIMBOgsILhCxAxDHARCjAjoFCAAQsQM6AggAOggILhCxAxCDAToFCAAQyQM6BQgAEJIDOgQIABAKOgYIABAWEB46BQgAEIYDUP8cWKeEAWDZpgFoAXAAeACAAWuIAfkWkgEEMzguMZgBAKABAaoBB2d3cy13aXqwAQo&sclient=gws-wiz 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
norutah Posted May 17, 2021 Share Posted May 17, 2021 I asked goggle as well. And then I heard a different view from you and asked for more info https://www.google.com/search?q=clutch+makes+noise+when+not+pressed&sxsrf=ALeKk02BE7ENtnV0-uiBLNYvwrOd5gS8pg%3A1621264343119&ei=14eiYLnSBtD--wT--4qYAw&oq=clutch+makes+nice&gs_lcp=ChNtb2JpbGUtZ3dzLXdpei1zZXJwEAEYAjIECAAQDTIECAAQDTIECAAQDTIECAAQDTIECAAQDTIGCAAQDRAeMgYIABANEB4yBggAEA0QHjoECAAQRzoHCCMQ6gIQJzoECAAQQzoHCC4QsQMQQzoFCAAQkQI6BQgAELEDOgIIAFCJ-gFY7pECYKWuAmgCcAF4AYABrAeIAYsNkgEJMC4zLjEuNi0xmAEAoAEBsAEPyAEIwAEB&sclient=mobile-gws-wiz-serp Sent from my HD1925 using Tapatalk Link to comment Share on other sites More sharing options...
norutah Posted May 17, 2021 Share Posted May 17, 2021 I asked goggle as well. And then I heard a different view from you and asked for more info https://www.google.com/search?q=clutch+makes+noise+when+not+pressed&sxsrf=ALeKk02BE7ENtnV0-uiBLNYvwrOd5gS8pg%3A1621264343119&ei=14eiYLnSBtD--wT--4qYAw&oq=clutch+makes+nice&gs_lcp=ChNtb2JpbGUtZ3dzLXdpei1zZXJwEAEYAjIECAAQDTIECAAQDTIECAAQDTIECAAQDTIECAAQDTIGCAAQDRAeMgYIABANEB4yBggAEA0QHjoECAAQRzoHCCMQ6gIQJzoECAAQQzoHCC4QsQMQQzoFCAAQkQI6BQgAELEDOgIIAFCJ-gFY7pECYKWuAmgCcAF4AYABrAeIAYsNkgEJMC4zLjEuNi0xmAEAoAEBsAEPyAEIwAEB&sclient=mobile-gws-wiz-serp Sent from my HD1925 using TapatalkSo possible input shaft bearing? Sent from my HD1925 using Tapatalk Link to comment Share on other sites More sharing options...
Max Capacity Posted May 17, 2021 Share Posted May 17, 2021 If the noise stops when you push in the clutch pedal, then yes the input bearing needs replacing. Go out to the car, start the engine...think about what is happening... 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
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