4.10s and gear whine..

[CMK720]

I just got 4.10's and I don't have whine. But I do have like a whomping noise pisses me off. Gotta get them changed out. I may have a "defective gear set"

 

[1/4MILEMUSTANG]

I see your point as well as 19Cobras point, neither is wrong in my opinion, have personally seen it both ways. Sometimes you can save a bad install sometimes you can't. Sometimes (rarely I admit) it's just a stubborn set of gears. Just think it's good to see others opinions and real world experience.

I 100% agree with you man!

 

[LSlayer]

I have the 410A gears and they used to whine. After I put in my spydershaft and torqued the pinion nut to the factory spec of 150 ft-lbs if I remember correctly, no more whine.

 

[19COBRA93]

You can continue your pissing match on your own now, im not gonna argue in this guys thread anymore.

I'm sorry you feel that's what this was about. There's a lot of bad information out there on gear installs and through this discussion I think we could help inform people of their options, and what's really causing their gear related problems. There are a lot of gear installers out there who blame whine on a bad gear set simply because they don't want to admit they just didn't set them up correctly. Gear sets are pretty robust. Almost regardless of what they've previously been through, get that pattern to look right, and they're generally good to go. My customers are cheap, so I don't always have the luxury of working with brand new parts every time.

Seemed more like a discussion based on each others experience more than a pissing match...I always like to see what other people's experiences are.......

Thank you. A discussion, though of differing opinions, is still a discussion.

 

[QWKSNKE]

. There are a lot of gear installers out there who blame whine on a bad gear set simply because they don't want to admit they just didn't set them up correctly. Gear sets are pretty robust. .

I agree. Any whine in my experience with gear installs has either been from a bad pinion bearing or from the pinion nut not being cinched down enough

 

[1/4MILEMUSTANG]

I'm sorry you feel that's what this was about. There's a lot of bad information out there on gear installs and through this discussion I think we could help inform people of their options, and what's really causing their gear related problems. There are a lot of gear installers out there who blame whine on a bad gear set simply because they don't want to admit they just didn't set them up correctly. Gear sets are pretty robust. Almost regardless of what they've previously been through, get that pattern to look right, and they're generally good to go. My customers are cheap, so I don't always have the luxury of working with brand new parts every time.



Thank you. A discussion, though of differing opinions, is still a discussion.

In that case please accept my apology for taking it as something it wasnt. I can totally repect your last post and greatly agree. Times are tough for people and I have my fair share of cheap customers as well, its just the way people have to be these days given our countries current situation.
+1 on people blaming the gears as being bad. Gears arent bad out of the box as much as people tend to think.

 

[1/4MILEMUSTANG]

I agree. Any whine in my experience with gear installs has either been from a bad pinion bearing or from the pinion nut not being cinched down enough

Amen!! I have see a lot of people just hit the pinion nut with an impact till all the slack is taken out or they try to set it by feel and end up getting it too tight. One thing I run into quite often is too tight of a pinion bearing preload get mistaken for a howling gears.

 

[QWKSNKE]

Amen!! I have see a lot of people just hit the pinion nut with an impact till all the slack is taken out or they try to set it by feel and end up getting it too tight. One thing I run into quite often is too tight of a pinion bearing preload get mistaken for a howling gears.

Yep, I have had one install out of the 100 or so that I have done that whined. It was because I did not tighten the pinion nut down enough and after a few days of driving the pinion developed some slight movement which threw the backlash off. Tighten the nut, no more noise.

In regards to Motive gears, I have only setup two (one Ford, one Chevy)with this brand and my customers experienced no noise problems. So I don't know if that 'rumor' has validity or not.

And I will go ahead and admit, I am install by feel guy. I have not used any gauges since my first 2-3 gear installs 13 years ago. But, I worked with gear setups in my job (airline industry)for many years before moving up in the company. So dealing with that type of stuff everyday, you learn what proper gear meshing feels like..LOL..I have had one or two customers who watched me setup gears in the past and although they were having no problems go back and check the backlash a few days later because it bothered them. Each time it was dead on .009-.010 backlash as it should be.

 

[i05GT]

FRPP 4.10s here. Installed brand new at a well known Stang shop about a year ago. Was told thats its a crap shoop and 80% of these things make noise. I have a slight howl in mine but specs are perfect and no problems. Lets not forget, Mustangs are not meant to be quiet....just my .02

 

[sportinawoody]

i had 373's installed around 10k ago and the whined on partial acceleration. i dealt with it. last week i heard the carrier bearings start roaring at all speeds loaded and unloaded. funny thing is , i bought new carrier and pinion bearings and races when i had the gear installed. guess i got fucked someway.

 

[jmg2k5gt]

This whine is at all speeds it seems, anytime Im crusing. Sounds like a small electric motor running.

 

[tylerxfire]

slight whine on decel between 50mph to 40mph besides that nothing with my frpp 4.10's

 

[DKS]

Yep, I have had one install out of the 100 or so that I have done that whined. It was because I did not tighten the pinion nut down enough and after a few days of driving the pinion developed some slight movement which threw the backlash off. Tighten the nut, no more noise.

In regards to Motive gears, I have only setup two (one Ford, one Chevy)with this brand and my customers experienced no noise problems. So I don't know if that 'rumor' has validity or not.

And I will go ahead and admit, I am install by feel guy. I have not used any gauges since my first 2-3 gear installs 13 years ago. But, I worked with gear setups in my job (airline industry)for many years before moving up in the company. So dealing with that type of stuff everyday, you learn what proper gear meshing feels like..LOL..I have had one or two customers who watched me setup gears in the past and although they were having no problems go back and check the backlash a few days later because it bothered them. Each time it was dead on .009-.010 backlash as it should be.

I got gears put in a couple of weeks ago and never noticed a whine until the last couple of days. It's very minor and only when coasting. It's not bad at all, but if I can get rid of it I want to.

I take it I should try tightening the pinion nut? Any thing other than the torque specs I need to know??

 

[DKS]

slight whine on decel between 50mph to 40mph besides that nothing with my frpp 4.10's

Mine is exactly the same. It's fine unless I'm going about 40-50 and let off the gas and it's coasting, then I get a slight whine. The second I touch the gas it stops, or if I depress the clutch it stops.

@ the gear guys, what does that sound like??? Possibility I need to just tighten the pinion nut??