Lately on cold mornings, my 94 Corolla is making a whirring noise when the clutch pedal is not pushed in; when I push the pedal in, the noise goes away. Would that be more likely something in the trans and not the throwout bearing? It goes away after a few minutes. Thanks.
Corolla clutch/transmission noise?
- Thread starter Drew99GT
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Yep,something inside the transmission. If it was the throwout bearing,it`s make noise when the clutch pedal was pushed in. Sounds like the oil in the transmission is too thick for your cold mornings. Replace the transmission fluid and see if that fixes it.
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Originally Posted By: NHGUY
Maybe the trans input bearing....?
That`s what I was thinking too.
Maybe the trans input bearing....?
That`s what I was thinking too.
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It is the input shaft bearing, It did that on my Honda with no ill affect till it caused so much play in my input shaft that it caused my rear main to begin to leak and ruin my clutch.
Then I just drove it with a slipping clutch for 2k miles, even took it on a 300 mile trip with a rear main leak and oily clutch, by the end of the 2k the input shaft bearing itself fell apart, and then the noise got REALLY loud, and occasionally one of the loose bearings in the transmission would slide into a cog and make an interesting grinding noise randomly while driving, I drove it until the next weekend because I couldn't tear down mid week. I installed a new transmission, rear main, clutch kit and flywheel, its g2g now.
Hopefully your transmission input shaft noise doesn't go as south as mine... because if you do not know how to fix it by yourself, you can be out a lot of $$ for the repairs.
Then I just drove it with a slipping clutch for 2k miles, even took it on a 300 mile trip with a rear main leak and oily clutch, by the end of the 2k the input shaft bearing itself fell apart, and then the noise got REALLY loud, and occasionally one of the loose bearings in the transmission would slide into a cog and make an interesting grinding noise randomly while driving, I drove it until the next weekend because I couldn't tear down mid week. I installed a new transmission, rear main, clutch kit and flywheel, its g2g now.
Hopefully your transmission input shaft noise doesn't go as south as mine... because if you do not know how to fix it by yourself, you can be out a lot of $$ for the repairs.
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I also smell trans input bearing.
Maybe you are low on fluid, or can go thicker to get more miles out of it.
Maybe you are low on fluid, or can go thicker to get more miles out of it.
I actually just changed the transmission fluid about a month ago using Valvoline 75w-90. It's what the manual calls for. It was making the noise last winter as well but only during the coldest mornings. I'll call up the Toyota guy I use and see what he says.
Thanks guys.
Thanks guys.
You've put the wrong fluid into your transaxle - That 75w90 fluid is probably GL5 or at best, GL4 and that is the incorrect fluid for a transaxle. It is meant for RWD transmissions or differentials.
Find out on a honda forum what everyone else is using. It probably will run smooth and quiet on simple ATF fluid and that is likely what any shop would have put in if you'd taken it to them. Most would probably say "Redline" fluid is best but honestly ATF changed every 15K will probably make all the difference at half the price.
Find out on a honda forum what everyone else is using. It probably will run smooth and quiet on simple ATF fluid and that is likely what any shop would have put in if you'd taken it to them. Most would probably say "Redline" fluid is best but honestly ATF changed every 15K will probably make all the difference at half the price.
Originally Posted By: senquack
You've put the wrong fluid into your transaxle - That 75w90 fluid is probably GL5 or at best, GL4 and that is the incorrect fluid for a transaxle. It is meant for RWD transmissions or differentials.
Find out on a honda forum what everyone else is using. It probably will run smooth and quiet on simple ATF fluid and that is likely what any shop would have put in if you'd taken it to them. Most would probably say "Redline" fluid is best but honestly ATF changed every 15K will probably make all the difference at half the price.
No, actually both the owners manual and the shop manual state the proper fluid is either a GL-5 or GL-4 75w-90 gear oil. What does Honda have to do with my TOYOTA?
You've put the wrong fluid into your transaxle - That 75w90 fluid is probably GL5 or at best, GL4 and that is the incorrect fluid for a transaxle. It is meant for RWD transmissions or differentials.
Find out on a honda forum what everyone else is using. It probably will run smooth and quiet on simple ATF fluid and that is likely what any shop would have put in if you'd taken it to them. Most would probably say "Redline" fluid is best but honestly ATF changed every 15K will probably make all the difference at half the price.
No, actually both the owners manual and the shop manual state the proper fluid is either a GL-5 or GL-4 75w-90 gear oil. What does Honda have to do with my TOYOTA?
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LOL! these kind of postings are happening rather frequently these days...
IMHO it's either the input shaft bearing noise or throwout bearing.
Good luck and plse take care.
Q.
IMHO it's either the input shaft bearing noise or throwout bearing.
Good luck and plse take care.
Q.
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Get some Amsoil MTG or Redline MT90 and I`m willing to bet the whirring sound will go away. What`s happening is that the Valvoline gear oil is too thick on cold mornings and isn`t reaching the input shaft bearing till it warms up and thins out. Change it out asap.
I've tried every available synthetic gear oil/MTF other than Amsoil and they've all been horrible. Redline MT90 was way too notchy when shifting. I know it's counter intuitive, but it's my experience.
I'm thinking about trying Nissan 75w-85 next.
I'm thinking about trying Nissan 75w-85 next.
Dumb question: is the input shaft bearing inside the transaxle and therefore lubricated by gear oil?
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Input shaft bearing is residing inside the gearbox so technically-speaking: it's supposed to be lubricated by gear oil.
In order to lubricate this bearing, you have to ensure that the gear oil level within your gearbox is proper, not too low is what I'm trying to say.
Lastly: a proper clearance/preload is required in order for a new/replacement input shaft bearing to work properly: if it's not loaded properly, you may get that "rushing" sound during cold start/neutral gear while engine idling.
Q.
In order to lubricate this bearing, you have to ensure that the gear oil level within your gearbox is proper, not too low is what I'm trying to say.
Lastly: a proper clearance/preload is required in order for a new/replacement input shaft bearing to work properly: if it's not loaded properly, you may get that "rushing" sound during cold start/neutral gear while engine idling.
Q.
Gear oil level is perfect (fluid was changed a month ago). Guess I'll just let er go until she blows.
Well if they did indeed spec GL-5 that is fine and if you did try other fluids like Redline than sure it is a bearing. But gear oil is pretty heavy stuff and if someone had put that into many transaxles a noise at idle is exactly what happens.
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