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howling noise from tranny on de acceleration 

 

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 Post subject: howling noise from tranny on de acceleration
Posted: Sat Feb 11, 2012 6:06 pm 
Oompa Loompa
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Location: melbourne
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hey guys.
only recently noticed a noise coming from my btr 4 speed i believe.

when ever im driving at about 60-80 and take my foot off the accelerator a quiet but noticable holwing noise happens untill about 30 kmh then it stops. it doesnt make the noise at all when i have the foot on the accelerator even a tiny bit. any ideas?
not enough fluid?

thanks
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 Post subject: Re: howling noise from tranny on de acceleration
Posted: Sat Feb 11, 2012 11:07 pm 
ACT Cruise Moderator
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jacob123 wrote:
hey guys.
only recently noticed a noise coming from my btr 4 speed i believe.

when ever im driving at about 60-80 and take my foot off the accelerator a quiet but noticable holwing noise happens untill about 30 kmh then it stops. it doesnt make the noise at all when i have the foot on the accelerator even a tiny bit. any ideas?
not enough fluid?

thanks



Sure it's not the diff?

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

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 Post subject: Re: howling noise from tranny on de acceleration
Posted: Sat Feb 11, 2012 11:35 pm 
Oompa Loompa
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honestly im not sure. i dont understand why i t would just suddenly do it.

i mean i serviced my auto bout 3 weeks ago and havent had a problem. but there may be a chance its playing up. not sure. but thats why its a suspicion to me, im open to all thoughts though

would a diff make that nice when there is no throttle applied?
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 Post subject: Re: howling noise from tranny on de acceleration
Posted: Sat Feb 11, 2012 11:57 pm 
ACT Cruise Moderator
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jacob123 wrote:
would a diff make that nice when there is no throttle applied?


Yes, that's my I asked.

if it's (the diff) howling on decelleration, it means it's wearing the back side of the teeth on the gears (the front side is used on acceleration), when there's no throttle the slack in the diff means the other side of the teeth are being utilised.

First section here explains better: http://bernardembden.com/xjs/diff/index.htm

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

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 Post subject: Re: howling noise from tranny on de acceleration
Posted: Sun Feb 12, 2012 12:04 am 
Oompa Loompa
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Ride: xh panelvan

Location: melbourne
VIC, Australia

hmm thats interesting, just seems bizzare it would happen so suddenly, although when it says it does it when the oil is warmed up, mine does it straight off the mark.

will replacing the oil in the diff be of any help?
thanks,
jacob
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 Post subject: Re: howling noise from tranny on de acceleration
Posted: Sun Feb 12, 2012 12:17 am 
ACT Cruise Moderator
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confirm where the noise is coming from first.

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

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 Post subject: Re: howling noise from tranny on de acceleration
Posted: Sun Feb 12, 2012 5:57 pm 
Oompa Loompa
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Age: 24

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Location: melbourne
VIC, Australia

after having a bit of a listen on the way to and from work. im starting to think it is.

when i put it into the first second and third part of the auto, it is a little but more louder and defined as the engine is slowing the car down, meaning that it would be using the back of the teeth as you said?
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