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#1990484 - 08/18/10 11:38 PM Manual transmission whine normal?
rationull Offline


Registered: 04/28/07
Posts: 2777
Loc: California, USA
I've had three cars of my own, all MTs, and all of them have had a sort of quiet whine noise from the MT, especially when engine braking at low engine speeds (2500 RPM and lower) in second gear for example. Seems like my Civic didn't have it when brand new but I can hear it a bit now. I've also noticed it in my wife's car which we've also had from new, and it only has 23k miles on it.

I'm guessing this is normal -- what causes it? Is it just what the gears do as the spin due to their shape?

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#1990489 - 08/18/10 11:47 PM Re: Manual transmission whine normal? [Re: rationull]
Lethal1ty17 Offline


Registered: 07/01/10
Posts: 690
Loc: Georgia
perhaps its time to change the tranny fluid with something high quality.

redline makes some great transmission fluids.

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#1990494 - 08/19/10 12:08 AM Re: Manual transmission whine normal? [Re: Lethal1ty17]
5sfe91 Offline


Registered: 12/11/09
Posts: 754
Loc: Corpus Christi,Texas
yeah maybe some new gear oil might help
_________________________
1991 Toyota Celica 320,000 miles
Current fill
Peak 5w-30

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#1990555 - 08/19/10 06:06 AM Re: Manual transmission whine normal? [Re: 5sfe91]
eljefino Offline


Registered: 06/15/03
Posts: 29306
Loc: ME
It's a function of how the gears are cut. The old "rock crushers' sounded like school busses all the time, forwards or not.

There's a compromise between strength and quietness; strong is loud.

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#1990567 - 08/19/10 06:40 AM Re: Manual transmission whine normal? [Re: eljefino]
Johnny248 Offline


Registered: 07/19/09
Posts: 2013
Loc: Detroit, MI
It's normal on decel or engine braking. Nothing wrong with it. Now, if you are cruising down the road going 50 and its whinning away, then that is ot normal.

Sometimes a "better" gear oil will reduce that a little but, but it really doesn't go away. Motorcyles do it, everything does it with real transmission.
_________________________
'11 Ram 1500 5.7L
'08 Beetle 2.5L
'06 Eclipse GT 3.8L
'95 Four Winns Sundowner 5.0FI
'94 Honda Dio 72cc Big Bore


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#1990576 - 08/19/10 06:53 AM Re: Manual transmission whine normal? [Re: Johnny248]
JustinH Offline


Registered: 04/17/04
Posts: 4112
Loc: Texas
My little saturn ion has made a little noise like that since it was new, it is a function of a manual trans.

I run Mobil 1 lube in my trans also..
_________________________
'10 Toyota Rav4 Sport
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#1990619 - 08/19/10 08:03 AM Re: Manual transmission whine normal? [Re: rationull]
d00df00d Offline


Registered: 10/20/05
Posts: 10182
Loc: PA
My current car's manual transmission makes all kinds of noise. My old car's manual transmission ('95 Maxima) never made a sound unless something was terribly wrong.
_________________________
2011 Mazda RX-8 R3
Castrol GTX 5w-20

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#1990637 - 08/19/10 08:19 AM Re: Manual transmission whine normal? [Re: d00df00d]
Trav Offline


Registered: 11/20/06
Posts: 13991
Loc: MA, Mittelfranken.de
Some whine more than my first wife some are quiet as a church mouse.Ask owners of a car like yours with the same transmission.
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#1990656 - 08/19/10 08:37 AM Re: Manual transmission whine normal? [Re: Trav]
Kestas Offline



Registered: 06/04/02
Posts: 11381
Loc: The Motor City
They'll whine if the gears are made with old tooling. My dad worked his whole career as an engineer at Ford Transmission and Axle. This is one of the issues they had to address.

Since yours developed the noise with use, it seems that the parts are now worn in and make noise, or one of the rotating components has a defect... there are too many scenarios to list.

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#1990662 - 08/19/10 08:41 AM Re: Manual transmission whine normal? [Re: Trav]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 9944
Loc: N.H, U.S.A.
Soory to hijack buy my 1 and 4th syncros are not working HOT, with the amalie GL5. Is there a readily available (at big box auto store or wallyworld or sears) GL4 MT transaxle lube without hypoid? I assume since there is no 90 degree power direction change in a transvere mounted FWD transaxle there is no need for the heavy does sulphur ring and pinion additive in the GL5 which can cause bad synchro braking. I could use a 80w-90 or 75w-90. NO M1 LSD!! I have no quick access to Amsoil or Redline products. This is the Toyota.


Edited by ARCOgraphite (08/19/10 08:43 AM)
_________________________
2014 Nissan Rogue S CVT, OC#4 13740mi-Castrol Magnetec 5W30+Nissan 15208-9E01A Filter
2015 Forester 6MT 5Door, OC#6 41243mi-M1EP 0W20+Subaru Filter

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#1990674 - 08/19/10 08:48 AM Re: Manual transmission whine normal? [Re: ARCOgraphite]
Steve S Offline


Registered: 01/20/03
Posts: 18449
Loc: East of IGO
Amsoil gets shipped to you pretty quick. Ask a site sponser.
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#1990847 - 08/19/10 10:58 AM Re: Manual transmission whine normal? [Re: Steve S]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
Reverse often whines most. Reverse gears are often straight cut, while the others are helical.
Next comes first gear, then second.[for noise]
Manual trannys/ transaxles are not silent. Gears and bearings are moving around at high speeds.

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#1990858 - 08/19/10 11:08 AM Re: Manual transmission whine normal? [Re: mechtech2]
Lethal1ty17 Offline


Registered: 07/01/10
Posts: 690
Loc: Georgia
Originally Posted By: mechtech2
Reverse often whines most. Reverse gears are often straight cut, while the others are helical.
Next comes first gear, then second.[for noise]
Manual trannys/ transaxles are not silent. Gears and bearings are moving around at high speeds.


you beat me to the straight cut thing about reverse gear.

change the fluids with something better then tell us if it fixed it

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#1990870 - 08/19/10 11:17 AM Re: Manual transmission whine normal? [Re: Lethal1ty17]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 9944
Loc: N.H, U.S.A.
I guess there is no generally available GL-4 from valvoline or pennzoil ?!
_________________________
2014 Nissan Rogue S CVT, OC#4 13740mi-Castrol Magnetec 5W30+Nissan 15208-9E01A Filter
2015 Forester 6MT 5Door, OC#6 41243mi-M1EP 0W20+Subaru Filter

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#1991149 - 08/19/10 03:35 PM Re: Manual transmission whine normal? [Re: ARCOgraphite]
rationull Offline


Registered: 04/28/07
Posts: 2777
Loc: California, USA
Originally Posted By: ARCOgraphite
I guess there is no generally available GL-4 from valvoline or pennzoil ?!


I was able to get StaLube brand GL-4 gear oil from Napa several years ago. Last I checked I think they still carried it. Don't recall the weight but it was something pretty standard.


Edited by rationull (08/19/10 03:36 PM)

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