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Old 08-18-2019, 02:47 PM #1
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Transmission whine

Has anyone have a whine sound from there 750f?

Only can find responses from gen3 forms on searches.
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Old 08-18-2019, 03:16 PM #2
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Quote:
Originally Posted by having fun View Post
Has anyone have a whine sound from there 750f?

Only can find responses from gen3 forms on searches.
I haven't, have you check the fluid level?
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Old 08-18-2019, 03:58 PM #3
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Most definitely. I change all fluids before needed/required.
Trans system works like it should, shifting, running, ect.

Just got this morning a low pitch whine sound, and is coming from trans area. Increases with rpm lifting.

Never heard this before or from any postings. Almost like a mild power steering sound. Yes I checked there.
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Old 08-18-2019, 04:05 PM #4
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I even did a fluid level check, color is really good looking for the miles on it.
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Old 08-19-2019, 12:58 AM #5
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Quote:
Originally Posted by AuSeeker View Post
I haven't, have you check the fluid level?
Ok Skip, you can laugh after I type this out.

Whine was not loud enough to hear in the engine area. Dominate underneath trans area.
Broke out stethoscope and hear whirling sound from the trans forward.

Run to the store later, and my scan gauge started showing voltage flexuation.
Smoke comes out a little later, LOL.

First item I have had to replace on this ride, not bad.
More than happy to replace this alternator versus the thought of trans problem.

Problem solved!
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Old 08-19-2019, 06:54 AM #6
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No laughing from me, I know how those kinds of sounds can telegraph and sound like they're coming from several places at once, glad you found the problem Leonard!
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Old 08-19-2019, 10:02 AM #7
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Quote:
Originally Posted by having fun View Post
Ok Skip, you can laugh after I type this out.

Whine was not loud enough to hear in the engine area. Dominate underneath trans area.
Broke out stethoscope and hear whirling sound from the trans forward.

Run to the store later, and my scan gauge started showing voltage flexuation.
Smoke comes out a little later, LOL.

First item I have had to replace on this ride, not bad.
More than happy to replace this alternator versus the thought of trans problem.

Problem solved!
Mine definitely has some sort of whine. I have replaced the alternator awhile back during the tbelt install and did a power-steering flush not long after that (with the correct fluid as well) and it never went away or skipped a beat. I'm thinking trans but I haven't touched it yet. Thinking about doing a fluid transfer via the cooler lines and see what happens then.
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Old 08-19-2019, 11:57 AM #8
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Usually the trans only make whine sounds due to low fluid level. Changing the fluid helps the function of the hydraulics.

I would recommend changing in the manor you speaking.
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Old 08-19-2019, 06:02 PM #9
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Quote:
Originally Posted by That_Titanium_4RNR View Post
Mine definitely has some sort of whine. I have replaced the alternator awhile back during the tbelt install and did a power-steering flush not long after that (with the correct fluid as well) and it never went away or skipped a beat. I'm thinking trans but I haven't touched it yet. Thinking about doing a fluid transfer via the cooler lines and see what happens then.
When you replaced the alternator did you also check the idler pulley and the belt tensioner pulley, both of those bearings tend to whine when they're close to going completely bad?

A mechanic's stethoscope work very well pinpointing such whines and other noises, just be very careful when using one near moving pulleys and belts etc., but it can be done if you watch what your doing.
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Old 08-20-2019, 09:46 AM #10
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Quote:
Originally Posted by AuSeeker View Post
When you replaced the alternator did you also check the idler pulley and the belt tensioner pulley, both of those bearings tend to whine when they're close to going completely bad?

A mechanic's stethoscope work very well pinpointing such whines and other noises, just be very careful when using one near moving pulleys and belts etc., but it can be done if you watch what your doing.
Yeah I actually replaced the belt tensioner assembly AND pulley but I don't think I did the idler pulley now that you mention it. Maybe Ill do that soon and see if that changes anything.
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