Gear Whining Noise

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samlnt Associate Join Date: Oct 2006 Location: chennai, India Posts: 29	Gear Whining Noise 10/01/2007 1:27 PM
	Hi, Gear whining noise is encountered in 5th gear of an automobile gearbox..can anyone suggest how to elliminate or reduce this problem. I read some technical papers and they suggest its the transmission error(TE) which is primarily responsible for this problem. but can Transmission error be reduced in post design stage..? and what are the control factors which effect transmission error. does crowning effect excess or less be responsible for gear whining? please suggest.... best regards, samson. __________________ sam
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dadima Active Contributor Join Date: Sep 2007 Posts: 18	#1 Re: Gear Whining Noise 10/01/2007 5:43 PM
	hi Samlnt , your problem seems to be very common on most of the transmissions, there are some points that requird more details , is the transmission now on operation ? is this problem arises for most of the transmissions of the same kind or only one .that under investigation . ? would you specify what is the rpm of the input torgue?
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Anonymous Poster	#2 Re: Gear Whining Noise 10/01/2007 5:57 PM
	The most common cause of whining in a car is the wife / girlfirend wanting to go shopping...
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Andy Germany Guru Join Date: Sep 2006 Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E Posts: 17996 Good Answers: 200	#3 Re: Gear Whining Noise 10/02/2007 2:53 AM
	If it is not the girlfriend or wife, then go to a good transmission shop, one with a good name and get a replacement transmission with a proper guarantee from them. Working on transmissions is not for amateur mechanics (no matter HOW good you are with engines etc) and a replacement is cheaper than wrecking it yourself and buying one from scratch!!..... __________________ "What others say about you reveals more about them, than it does you." Anon.
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double_j_b Guru Join Date: Jan 2007 Location: Broken Arrow, OK, USA Posts: 838 Good Answers: 26	#4 In reply to #3 Re: Gear Whining Noise 10/02/2007 11:01 AM
	Good answer Andy. Although I am an exceptional auto mechanic and I work on very sophisticated equipment at my company. I still will have someone else rebuild an automatic transmission. Standard tranny's are easy. Your best off to take Andy's avice on this one. __________________ If necessity is the mother of invention then is laziness the mother of necessity?
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Andy Germany Guru Join Date: Sep 2006 Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E Posts: 17996 Good Answers: 200	#6 In reply to #4 Re: Gear Whining Noise 10/02/2007 5:40 PM
	Well put!! __________________ "What others say about you reveals more about them, than it does you." Anon.
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Rick@cae Power-User Join Date: Sep 2006 Location: Canada Posts: 435 Good Answers: 4	#5 Re: Gear Whining Noise 10/02/2007 3:01 PM
	Make sure there is enough oil in the tranny. The 5th gear is the smallest and more likely to be "above" the oil level. It happened to a friend of mine (4th & 5th gear) and a quart of oil fixed the problem. Good luck. __________________ Handle every stressful situation like a dog. If you can't eat it or play with it, just pee on it and walk away. - unknown.
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Anonymous Poster	#7 Re: Gear Whining Noise 10/03/2007 12:05 AM
	yes..if it was my vehicle i would have got it replaced straightaway...i work for a automobile company an this prob is encountered in our gearboxes while testing..now what can be done to minimise the noise.. sam
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ducon Guru Join Date: Dec 2006 Location: Hop around Toronto, New York & Karachi Posts: 1876 Good Answers: 19	#8 In reply to #7 Re: Gear Whining Noise 10/03/2007 4:43 PM
	Try the similarity to help. Whining noises in our high pressure 32 bar & high speed boiler furnace oil pumps are normally due to non balanced with motor. The pump shaft coupling need to be balanced with the motor shaft on a lathe. This I learnt after one pump simply "jammed" with excessive whining noise. I had replaced this pump and had not even taken payment. It jammed within 15 minutes of whining. Since I had lost the pump and my money, i had no option but to open the pump part by part then straightened it and then balanced the coupling on a lathe. No whining and happy running since 12 years. good News- Got my payment that very day. __________________ I not only use all the brains that I have, but all that I can borrow. Woodrow Wilson
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Andy Germany (2); Anonymous Poster (2); dadima (1); double_j_b (1); ducon (1); Rick@cae (1)

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