Whining noise only in 4th & 5th.
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09-22-2014, 04:33 PM
Post: #1
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Whining noise only in 4th & 5th.
Hi all,
My 86 trueno is whining only in 4th & 5th gear but i can't hear if it comes from, my first opinion, the gearbox or the rear end because this has new bearings and if it would be the rear end it makes no differences between gears. Someone could help me please ? Thanks |
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09-24-2014, 06:18 AM
Post: #2
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Whining noise only in 4th & 5th.
(09-22-2014 04:33 PM)izanagi Wrote: My 86 trueno is whining only in 4th & 5th gear but i can't hear if it comes If the noise remains the same when you change from 4th into 5th, then it is very likely the the noise comes from the rear end. If it came from the gearbox you would expect the pitch (frequency) to drop when you changed from 4th to 5th. I doubt if there is anything that can be done if the noise is the only problem. My differential (which I consider to be in good condition) gets a small amount of whining (ringing) under light load at higher speed, but only at one particular speed. Above or below that speed it is quiet. You may get some improvement by experimenting with different oils. Otherwise, if the noise is just annoying, and does not make your ears bleed, you may just have to get used to it ![]() Cheers... jondee86 |
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09-24-2014, 10:50 PM
Post: #3
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Whining noise only in 4th & 5th.
(09-24-2014 06:18 AM)jondee86 Wrote:(09-22-2014 04:33 PM)izanagi Wrote: My 86 trueno is whining only in 4th & 5th gear but i can't hear if it comes I have castrol 75w140 oil. Special differential. My diff is setted up correctly and i would like to know why this noise. The noise is at every speed and only in 4th & 5th. I jacked up the car and tested it. |
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09-25-2014, 05:10 AM
Post: #4
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Whining noise only in 4th & 5th.
So you are saying that if you are moving 50kph in 3rd there is no
whining, but you change to 4th and the noise starts immediately ? That is strange, because the 4th and 5th gears use different sets in the gearbox, but you get no noise in 3rd or other gears ??? Does the noise remain the same with your foot on the gas and off the gas ? If going uphill in 4th the noise remains the same ? Cheers... jondee86 |
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09-25-2014, 06:48 AM
(This post was last modified: 09-25-2014 09:04 AM by izanagi.)
Post: #5
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Whining noise only in 4th & 5th.
(09-25-2014 05:10 AM)jondee86 Wrote: So you are saying that if you are moving 50kph in 3rd there is no Yes it starts in 4 th. If i go in example at 50 kph in 3rd i hear no noise but if i do the same in 4th i hear the noise. The noise decrease with my foot off and increase with my foot on. I've just called the guy who installed my diff and he said that he didn't checked the contact pattern. This is what i have: ![]() It is located on the top heel drive side and i think it's a bad contact pattern. Do i need to decrease backlash or add the thicker shim to the pinion ? I did these researches on the net and now i understand. |
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09-25-2014, 11:31 AM
Post: #6
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Whining noise only in 4th & 5th.
I think you have an axle out of balance in your gearbox. 4th and 5th is on the same axle as I recall...
Sarcasme is just one of the things I offer ![]() Daily driver: '92 Toyota Carina E GTI Rebuilt project: '86 Levin hatch ![]() |
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09-25-2014, 04:45 PM
(This post was last modified: 09-25-2014 04:50 PM by izanagi.)
Post: #7
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Whining noise only in 4th & 5th. | |||
09-25-2014, 07:09 PM
Post: #8
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Whining noise only in 4th & 5th. | |||
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