Transmission Noise except 4th
Thread Starter
Racer
Joined: Feb 2012
Posts: 254
Likes: 0
From: Morrisville NC
Transmission Noise except 4th
Im getting a really loud whine in 1,2,3 and 5,6 until going 75-80. 4th doesnt seem to be affected at all. I noticed the whine quiets down after rolling hills. Do i just need more soundproofing or transmission service? Just wanted to ask the experts and do it right.
Thanks
Thanks
Tech Contributor
Joined: Jan 2007
Posts: 19,461
Likes: 1,166
From: Dyer, IN
Im getting a really loud whine in 1,2,3 and 5,6 until going 75-80. 4th doesnt seem to be affected at all. I noticed the whine quiets down after rolling hills. Do i just need more soundproofing or transmission service? Just wanted to ask the experts and do it right.
Thanks
Thanks
Thread Starter
Racer
Joined: Feb 2012
Posts: 254
Likes: 0
From: Morrisville NC
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Burning Brakes
Joined: May 2007
Posts: 829
Likes: 0
From: San Francisco CA
OOh that's not good, I just had the exact same thing a month ago. Pretty soon the whining turned into a tap that turned into shrapnel. Pretty sure you have a bad cluster bearing that is causing the whine, you don't get it in fourth because it is on the mainshaft and doesn't run off the cluster. Thats how it was explained to me. Get it checked asap, make sure your fluid is full, if it is then you need to get the trans taken apart before serious damage is done. I wasn't so lucky, needed a new trans. Good luck.
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
That was my first thought as well. 4th gear isn't a "gear" per se. It's a 1:1 shot straight through the tranny.
Intermediate
Joined: Feb 2012
Posts: 46
Likes: 0
Thats right, 4th goes through. Here's an easy check. Stick your head underneath the back of the car the first thing you see is the diffy. Attached to it is the trans. If their is Any sweating or fluid on it or looks like there once was oily substance than you should have it serviced right away because you have a leak. Often times it is the seal for the input shaft bearing.
Don't run it too low or the bearing will break up causing a real mess and the need for a rebuild or replacement.
Note that If you are on a curve with enough lateral G, what little lubrication you have in the trans will not be where it is needed. It will be on the side of the gearbox.
Best thing to do is baby it from 1st to 4th and keep it in 4th until the leak is repaired and fluid level is restored. If you are a daily driver I would get it done soon before too much bearing wear develops. Don't apply much torque onto the trans. easy on the pedal.
Sounds to me like a new front seal and input shaft bearing for a proper repair. Quick fix is adding fluid which just postpones the inevitable.
Get it repaired before it grenades. If it grenades, you could mess up the casing beyond the ability for a new bearing and seal to do their job, which would mean a replacement trans
Don't run it too low or the bearing will break up causing a real mess and the need for a rebuild or replacement.
Note that If you are on a curve with enough lateral G, what little lubrication you have in the trans will not be where it is needed. It will be on the side of the gearbox.
Best thing to do is baby it from 1st to 4th and keep it in 4th until the leak is repaired and fluid level is restored. If you are a daily driver I would get it done soon before too much bearing wear develops. Don't apply much torque onto the trans. easy on the pedal.
Sounds to me like a new front seal and input shaft bearing for a proper repair. Quick fix is adding fluid which just postpones the inevitable.
Get it repaired before it grenades. If it grenades, you could mess up the casing beyond the ability for a new bearing and seal to do their job, which would mean a replacement trans
Supporting Vendor
Joined: Apr 2011
Posts: 3,332
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From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11-'12, '14-'15-'16-'17-'18
First check your fluid level. If that's ok, it's most likely the head gear (input shaft) and the cluster driven gear are damaged due to overheating. There is a chance of having a bad cluster bearing but most likely it's the gears. It's time for a new/used transmission. Cost of replacing the needed parts will be more than buying one used. Good luck.
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