View Full Version : Finally got dead quiet 4.10's in my 10 bolt


alamantia
12-29-2009, 10:02 AM
My car came stock from the factory with a torsen posi and 3.42 gears. About 5 years ago I bought brand new motive 4.10's and an install kit and paid an installer to preform the swap. They ran quiet up intil about 60mph and would whine from 60mph on up. Quite annoying. I tried different types of lube but none seemed to make a difference.

After about a year of this I figured they were set up incorrectly and bought another brand new set of motive 4.10's and an install kit and brought it to a different installer and paid for a swap. This second set of Motive 4.10's ran dead quiet up until about 60mph and then whined from 60mph on up. No difference from the first set of 4.10's

Another year went by and I read up to find that AAM gears are to be the quietest. I bought a brand new set of AAM 4.10's and an install kit and brought it to a 3rd installer and paid for a swap. They ran dead quiet up until about 60mph and whinned abouve 60mph.

Oh well, I guess its meant to be right? For the last few years I have accepted that 4.10 gears in a 7.5" 10 bolt will whine over 60mph.

I had picked up a rear out of a wrecked 95 Z28 with an Auburn posi and 3.42's. I figured I would keep it as a spare rear in case I ever hurt the one that was in the car I would have a back up. I got bored a few weekends ago so I dissasembled it, sanded it painted it and decided to install one of my old sets of motive 4.10's that I had laying around that whined figuring that I would have two 4.10 rears, one in the car and one out of the car. The only thing is I didnt have any spare shims or set up tools. I just torqued down the pinion nut with an impact until it was tough to turn the yoke and pounded the posi in with a dead blow usinng the shims that came in it with the 3.42 gears. I checked the pattern with some lithium grease and I was surprised to see the pattern appeard good. I didnt have a dial indicator so I couldnt check backlash so I dont know what its at. I assembled the rear, filled it with lube and decided to swap the axles over the weekend. The one thing I did notice is that the rear I set up is much harder to spin the yoke than the rear I removed from the car. Perhaps too much preload on the pinion nut? Im not sure because I dont own an in/lbs torque wrench. Anyway, I took the car for a ride and cant get it to whine at any speed, I drove it all the way up to 80mph and it wont make a peep.

I find it hard to believe that with 3 different installers, 3 different sets of brand new quality gears they all whined. I perform some back yard mechanic, slap together job and its dead silent. Perhaps overtightening the pinion preload keeps it quiet?

Kinda wierd if you ask me.

chevymec
12-29-2009, 11:22 AM
It might start wining after a few miles. I swaped carriers in my car and had to add a ring gear spacer. Not thinking and being in a hurry I didn't check the backlash. It was quit for a while and then it started whining. Maybe you lucked up, that would be great!!

snk-huntr
01-01-2010, 12:13 AM
yeh sometimes you get lucky,I just took my 410 rear out of my ta to go with a little milder gear ,drove the 410,s all summer without a peep out of them ,these are the first 410,s I have had that are not annoying .

redtail2426
01-01-2010, 11:52 AM
seems like u put a lot of wasted money into a weak 10 bolt.you could have put that money towards a stronger rear and had something that will hold up to some abuse.to each his own i guess

vette0009
01-01-2010, 11:58 AM
It's called the Calm Before the Storm :bomb:

:lol:

Bon

quews6lime
01-01-2010, 01:57 PM
depending on how many rpm's you are leavin at, will determine how long they will hold up

1nicez28
01-01-2010, 07:02 PM
I give it another week before it blows.

dr_whigham
01-02-2010, 05:34 AM
It's called the Calm Before the Storm :bomb:

:lol:

Bon


Bwwwaaa ha ha ha ha:rotflmao::rotflmao::rotflmao::rotflmao:

lemons12
01-02-2010, 07:08 AM
Default Finally got dead quiet 4.10's in my 10 bolt

Think you got it covered!

:jest:

Glad you got it figured out! :nod:

jay_lt4
01-02-2010, 07:50 AM
so did you even use a new crush washer or solid pinion spacer??,, if not , good luck with that rear end!

alamantia
01-04-2010, 08:05 AM
seems like u put a lot of wasted money into a weak 10 bolt.you could have put that money towards a stronger rear and had something that will hold up to some abuse.to each his own i guess

Yes, thank you.

depending on how many rpm's you are leavin at, will determine how long they will hold up

I dont use this car at the track

I give it another week before it blows.

Awesome, thank you.

so did you even use a new crush washer or solid pinion spacer??,, if not , good luck with that rear end!

Brilliant, thank you.

jay_lt4
01-04-2010, 10:24 AM
well, after that post i guess you are a rear end expert now.

alamantia
01-04-2010, 11:14 AM
I no where implied that I was any sort of expert. I however am intelligent enough to install a crush collar. But it was nice of you to assume that I didnt and it will blow up due to my ignorance. Your comment is stupid.

jay_lt4
01-04-2010, 11:23 AM
The only thing is I didnt have any spare shims or set up tools. I just torqued down the pinion nut with an impact until it was tough to turn the yoke and pounded the posi in with a dead blow usinng the shims that came in it with the 3.42 gears. I checked the pattern with some lithium grease and I was surprised to see the pattern appeard good. I didnt have a dial indicator so I couldnt check backlash so I dont know what its at.

The one thing I did notice is that the rear I set up is much harder to spin the yoke than the rear I removed from the car. Perhaps too much preload on the pinion nut? Im not sure because I dont own an in/lbs torque wrench.


where does it say you installed a new crush washer/sleeve, again your method for setting the rear end up to spec is outstanding!

chevymec
01-04-2010, 12:02 PM
Wow, yall missed the whole point of his thread. He was SURPRISED that the rear was quite. It isn't like he is saying that he normally sets them up like that.

alamantia
01-04-2010, 12:04 PM
I didnt mention a lot of things that are givens. The rear was not set up to spec. But aparently your life is so fuckin pathetic that you have nothing better to do than make negitive comments. So agian I thank you for being a real asshole.

firetpi
01-09-2010, 12:42 PM
All i have to say it come put a set of gears in for me, Installer has redone my gears 4 times and they still whine!!!

Estes
01-23-2010, 12:43 AM
All I've heard is "All 3.42< wine past 60" from backyard mechanics, such as myself. They clearly state that a wine is inevitable, despite your efforts. But experienced installers say otherwise...could it be that these "backyard mechanics" have not been properly compensating the preload. I tip my hat to you for accompishing a successfull install with the result being a silent set of 4.10's...even if it be by the intermingleing of stroke of luck and ingenuaty...:engarde:

NHRAMAN
01-23-2010, 05:23 AM
well, after that post i guess you are a rear end expert now.

:D......:engarde:

projectX
05-24-2010, 09:16 PM
All i have to say it come put a set of gears in for me, Installer has redone my gears 4 times and they still whine!!!

That would suck>

Outlaw72
05-25-2010, 11:12 AM
All I've heard is "All 3.42< wine past 60" from backyard mechanics, such as myself. They clearly state that a wine is inevitable, despite your efforts. But experienced installers say otherwise...could it be that these "backyard mechanics" have not been properly compensating the preload. I tip my hat to you for accompishing a successfull install with the result being a silent set of 4.10's...even if it be by the intermingleing of stroke of luck and ingenuaty...:engarde:

Gear noise is a combination of things. The set up can be right but folks need to understand that not every gear set was cut properly. There are alot of folks out there that do not know how to identify a set of improperly cut gears. A good company will thoroughly lap a pattern into the teeth before it ever leaves the machine shop. I'm not talking about the gears that are lapped just a little with a small pattern :cough: Richmond :cough: I could go on all day about this but nobody would listen to me anyway. I've set up and seen others set up several fbodys with 4:10 gears and not whine a lick. A properly cut set of gears and a good installer can keep 4:10, 4:56, 4:88 ect...ect...quiet all day long. Noisy gears are a condition of improper setup, improperly machined gears or a combination of both. Just because it's a 7.5 10 bolt and has a 4:10 gear in it does not mean it's just going to whine.

Outlaw72
05-25-2010, 11:18 AM
To the original poster......if your rear is still quiet and running strong, then consider yourself lucky because 99.99% of the time, folks in your situation would be experiencing 4:10 disaster.

projecTruck
02-14-2014, 06:52 PM
Gear noise is a combination of things. The set up can be right but folks need to understand that not every gear set was cut properly. There are alot of folks out there that do not know how to identify a set of improperly cut gears. A good company will thoroughly lap a pattern into the teeth before it ever leaves the machine shop. I'm not talking about the gears that are lapped just a little with a small pattern :cough: Richmond :cough: I could go on all day about this but nobody would listen to me anyway. I've set up and seen others set up several fbodys with 4:10 gears and not whine a lick. A properly cut set of gears and a good installer can keep 4:10, 4:56, 4:88 ect...ect...quiet all day long. Noisy gears are a condition of improper setup, improperly machined gears or a combination of both. Just because it's a 7.5 10 bolt and has a 4:10 gear in it does not mean it's just going to whine.

hi there,
I'm new here and you seem knowledgeable. can you teach me how to recognize these quiet gears or do you know of certain brands that are inherently quiet? I live near Waterford Michigan and hear that the ring and pinion shop is a repeatable place. if it makes a difference, I plan on using a Chrysler 8.25.
thanks,
eric

01ssreda4
02-14-2014, 07:29 PM
Will work better to start a fresh thread instead of bumping one from two thousand NINE.

2002kirk
02-15-2014, 06:17 AM
Good job man, Ignore the people saying negative stuff for no reason. Thats awesome its quiet. hopefully it holdds together for you.

madmike9396
02-15-2014, 06:24 AM
all that $ wasted you could of bought a 9 inch or S60

HioSSilver
02-15-2014, 09:21 AM
getting quiet gears is not that hard with a 7.5. Don't use Richmond gears is the first step. The seconded step is taking your time and doing it properly. I have set-up quit a few 10 bolt rears and only one was noisy......And it was a richmond gear. Motives or used sets of oem is what I recommend.

I learned and taught myself years ago after getting someone to set up a rear in my 78 Monza v8 car. I thought after they did it and it was noisy I can sure as hell do it and make it noisy myself. The only rear that has been noisy since is that dam richmond gear rear. I bought a used fab9......I took it apart before putting it in my car. Checked the pattern and all looked good........except it had richmond gears. I knew it was gonna make noise and it does. I'll fix it with a set of Motives one day.

1 FMF
02-15-2014, 11:26 AM
so what's the story with alamantia?
how many miles on that 10-bolt with 4.10 he assembled that was quiet, is it still quiet ?
is it still working?

01ssreda4
02-15-2014, 01:07 PM
Motive now owns Richmond and has moved production of Richmond to Italy. Might wanna renew your advice to keep up.

HioSSilver
02-15-2014, 01:14 PM
Well hopefully Motive will fix the junk that Richmond builds then.

01ssreda4
02-15-2014, 04:53 PM
That's the idea. I installed Summit gears which were allegedly a re-branded Richmond and they came out noisy as well.

Hardtop
02-17-2014, 07:58 AM
I had a set of Yukon gears and posi unit installed in my car. I've got about 30 runs on the gears and they are still quiet.