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Old 09-21-2017, 08:56 PM   #1
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Transmission..?

Hey fellas, here my prob. I have a 2006 4.6L, 5-speed, and idle is fine, startup is fine, but as soon as I throw it in 3rd on up, I hear a whining noise coming from underneath the car. It gets louder the faster the car goes and I dunno where it's coming from. I'm assuming it's the trans but could possibly be the exhaust? Also, sometimes I do hear grinding noises when I let off the gas. Explanations? Thanks


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Old 09-22-2017, 12:51 AM   #2
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Can you still hear the noise if you put the transmission in neutral and coast at the same speed that the noise occurs at with the transmission in gear?
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Old 09-22-2017, 05:16 AM   #3
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Coast in neutral and listen for the noise.
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Old 09-22-2017, 05:46 AM   #4
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Can you still hear the noise if you put the transmission in neutral and coast at the same speed that the noise occurs at with the transmission in gear?
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Coast in neutral and listen for the noise.
I third these suggestions. That will quickly rule in or out the transmission as the source of the noise.
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Old 09-22-2017, 05:49 AM   #5
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I third these suggestions. That will quickly rule in or out the transmission as the source of the noise.

When I put the car in neutral and coast the noise disappears. It's only when I give it gas or accelerate


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Old 09-22-2017, 05:51 AM   #6
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When I put the car in neutral and coast the noise disappears. It's only when I give it gas or accelerate


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Without much more info to go on, I would say to check the trans fluid level. It could be low.

It sounds like you have an bearing going bad at the moment.
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Old 09-22-2017, 05:58 AM   #7
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Without much more info to go on, I would say to check the trans fluid level. It could be low.

It sounds like you either have an bearing going bad at the moment.

Mmm I didn't think of the bearings. Definitely something to check out


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Old 09-22-2017, 06:02 AM   #8
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It would likely be the input bearing encased within the transmission. They generally do not fail unless the trans has been low on fluid, or the car has been driven extremely hard.

However, it is a human made part, and it can fail due to a flaw or natural wear.
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Old 09-22-2017, 11:04 PM   #9
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It could be the transmission... Or possibly a problem with the pinion gear/bearing in the rear end.
The easiest way to find out exactly what is causing the noise, is to put the car on a lift, and duplicate the conditions that the noise occurs with the wheels spinning safely in the air. That way someone can get under the vehicle with a stethoscope and listen for the noise.
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Old 09-23-2017, 11:46 AM   #10
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Its most likely the trans. Get a rebuilt one and install it or have it installed. Pricey but its a 100k+ mile fix. A fresh 3650 is a very VERY strong trans properly maintained.
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Old 09-23-2017, 03:46 PM   #11
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Its most likely the trans. Get a rebuilt one and install it or have it installed. Pricey but its a 100k+ mile fix. A fresh 3650 is a very VERY strong trans properly maintained.

Yeah no it's not the trans everybody. My ****ing rear differential exploded today


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Old 09-23-2017, 07:27 PM   #12
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At least it's cheaper than the trans to fix...unless the exploding diff shrapnel hit other cars and stuff at speed.
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Old 09-23-2017, 11:37 PM   #13
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Awww. That sucks!
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Old 09-24-2017, 12:06 AM   #14
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I'm sorry to hear that. Get it going, and get it back on the road.
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Old 09-24-2017, 10:32 AM   #15
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Well if you have another car or can borrow a truck dropping a solid axle is easy. Take it to a shop to have it rebuilt with a new diff and good time to do gears lol.
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Old 09-24-2017, 10:37 AM   #16
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Well if you have another car or can borrow a truck dropping a solid axle is easy. Take it to a shop to have it rebuilt with a new diff and good time to do gears lol.

Def gonna try and get new gears lol


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Old 09-24-2017, 11:06 AM   #17
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Do BMR upper control arm/bracket and lower control arms/relocation brackets while you are in there. And some good springs and adjustable BMR panhard.
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