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Old 08-02-2012, 03:38 PM   #1
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gears whining

i just had my 4.10s put in. what the heck is all the whining about in the gears? i have a flow master exhaust(loud as hell) and i hear it over that. does anyone know why it whines so much and if i can decrease it some how? also, it only does it really bad about 50+mph when i hit the gas lightly and a little when i hit it hard. thanks for your input!
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Old 08-02-2012, 04:51 PM   #2
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Some gears just make noise. But there's a chance it's not setup right.

---------- Post added at 09:51 PM ---------- Previous post was at 09:48 PM ----------

I just put in some 3.90 motive gears and they whine pretty good but ive been told motives have a reputation of whining no matter what. I've tried to adjust the rear end 3 times and it still whines with perfect wear pattern. Sometimes theres just nothing you can do about it.
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Old 08-02-2012, 05:53 PM   #3
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Its normal, i did the exact same thing with my 01 GT with flowmasters, just go easy on throttle for 500 miles or so
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Old 08-02-2012, 06:07 PM   #4
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The whine will quite down a bit and you'll also get used to it. Just a part of modding your car. Welcome to the world of aftermarket performance. Where you have to buy 8 things for 1 to work and they break faster then if they were stock.
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Old 08-02-2012, 07:01 PM   #5
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If you had a shop install them carry it back and have them fix it for free.

Gears should not whine if setup properly
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Old 08-02-2012, 07:58 PM   #6
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Quote:
Originally Posted by lowflyn
If you had a shop install them carry it back and have them fix it for free.

Gears should not whine if setup properly
+1 too much backlash. But its better to hear them than to smell them
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Old 08-02-2012, 10:28 PM   #7
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Re: gears whining

They didnt do them right..

Should of bought Ford Racing..
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Old 08-02-2012, 10:50 PM   #8
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Re: gears whining

thanks for your advice guys. do y'all know what makes it whine? the stock gears don't whine.
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Old 08-02-2012, 11:00 PM   #9
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Some gear are cut in a way that creates whine. It's impossible to get rid of it when it's the cut of gets and motive is notorious for it. Like I said I have attempted to fix mine 3 times and it still does it. I've tried with tight, medium and loose backlash and it still did it regardless. On another note ford racing doesn't make every gear ratio so I myself had to go with a different brand. I'm sure there's others in the same shoes.
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Old 08-02-2012, 11:04 PM   #10
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I just got my gears installed as well. Ford Racing 4.10. They whine also, but not loud or at cruising, just when accelerating. My stock gears did the same but only a tad quieter. If we take the cars back to the shop would I have to buy more oil, or could they reuse it. I'm clueless about how it's taken apart.. I don't want to drop another $50 on royal purple or have them replace it with normal oil.
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Old 08-02-2012, 11:20 PM   #11
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See mine only whine when power isn't being applied to the rear end or coasting. I'd say yours isn't set up right at all. And they should replace the oil. It's their job to install the gears right from the start and they should replace everything that needs replaced while fixing their mistake.

---------- Post added at 04:20 AM ---------- Previous post was at 04:18 AM ----------

I know people that have bought rear ends from moser an strange and they whine horribly bad and I think strange and moser know what their doing.
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Old 08-02-2012, 11:22 PM   #12
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Quote:
Originally Posted by t0t4lbl4ck0ut
Some gear are cut in a way that creates whine. It's impossible to get rid of it when it's the cut of gets and motive is notorious for it. Like I said I have attempted to fix mine 3 times and it still does it. I've tried with tight, medium and loose backlash and it still did it regardless. On another note ford racing doesn't make every gear ratio so I myself had to go with a different brand. I'm sure there's others in the same shoes.
You're talking about helical cut and straight cut.

Honestly, I would take them backed. They were supposed to be installed correctly ans obviously they weren't. I would advise that when you do, watch them do it and ask them to show you what the backlash and wear pattern are. The backlash should be set inbetween. 008"-.012". The wear pattern should be in the middle of the gear teeth
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Old 08-02-2012, 11:33 PM   #13
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So Ford Racing gears shouldn't whine at all? Not even a little? Just making sure and I understand you guys completely before dropping the hammer on my mechanic lol.
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Old 08-02-2012, 11:35 PM   #14
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I don't know if it's diffrent because I have an 05 but I had 4.10's put in a few months ago. I Didint give them a break in. No whine at ALL. They were ford racing gears.
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Old 08-02-2012, 11:42 PM   #15
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Re: gears whining

i did watch them do it and everything looked to be good to go. maybe they just need to be broke in. im going to take them back just in case. thanks.
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Old 08-03-2012, 12:47 AM   #16
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Crazymonkey I just drove home at night on dead streets. My whine isnt consistent it seems. Or it's so low I can't pick it up over the loud exhaust all the time. But mines not high pitched, it's sorta a low howling mostly towards 2000 RPMs. I get no trembling or anything like that at any speed. When I came to a stop light at from 70 to stop I sorta heard a louder deep howling and a little rattle sound then silence. Is yours similar?
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Old 08-03-2012, 01:16 AM   #17
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Re: gears whining

mine is high pitched.

---------- Post added at 12:16 AM ---------- Previous post was at 12:15 AM ----------

also when i am at 100+ its starts to shake slightly.
anyone know what the mph off set is?
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Old 08-03-2012, 09:11 AM   #18
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I bought the Ford racing gears from AM, they whined and vibrated badly but now there isn't any noise at all, its fine
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Old 08-03-2012, 09:19 AM   #19
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Quote:
Originally Posted by lowflyn
If you had a shop install them carry it back and have them fix it for free.

Gears should not whine if setup properly
This
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Old 08-03-2012, 10:29 PM   #20
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I installed ford 3.73 gears about 2 weeks ago and I have no whine. Sometimes you just have to buy from ford
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Old 08-04-2012, 10:01 AM   #21
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It's all in the install. I had the ford dealer install them even tho it cost me $600 because I personally know the shop manager and the mechanic that was working on my car had done many gear installs before.

The local shops I called had never done one before. One of them actually said "well I'm sure we can figure it out" F*** that. Lol.
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Old 08-04-2012, 10:18 AM   #22
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Quote:
Originally Posted by Jgill1992
It's all in the install. I had the ford dealer install them even tho it cost me $600 because I personally know the shop manager and the mechanic that was working on my car had done many gear installs before.

The local shops I called had never done one before. One of them actually said "well I'm sure we can figure it out" F*** that. Lol.
Yeah man I'd only have people who are experienced or trusted to do something like that. The guy I'm getting to do my 3.73s does nothing but rear end rebuilds and gear installations an has worked on alot of my buddies stangs
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Old 01-08-2013, 12:42 PM   #23
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I got a used 4.10 put into mine. Think with it being used that the whine is alright?
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Old 01-08-2013, 01:07 PM   #24
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Did you have the rear end rebuilt with new bearings? Did they put friction modifier in?
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Old 01-08-2013, 02:19 PM   #25
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I got a used 4.10 put into mine. Think with it being used that the whine is alright?
It depends on how many miles were on the gears. They may have worn to a specific pattern in the previous car and now you're trying to wear in a new pattern. I got mine with 2000 miles on them and they don't whine.
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Old 01-08-2013, 07:27 PM   #26
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Mine whined for 200 miles or so, then stopped
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Old 01-08-2013, 10:58 PM   #27
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I have absolutely no idea how used they are, but i can probably bet it was more than 2000 miles. I just don't want this to be an issue anytime soon. The whine itself doesn't bother me, but the trickle effect and rear end replacement again is something i don't want to mess with. I doubt the shop used any new seals bearings or pinions. They only replaced it from the 3 day law warranty from buying a vehical.
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