Howling rear when acelerating - The 1947 - Present Chevrolet & GMC Truck Message Board Network

3tooln · 11-13-2013, 06:04 PM

Hi. I have a Eaton rear in my 72 Suburban that is howling when I acelerate.
Im told its the pinion seal.
Anyone know what kind of cost I am looking at to get this correct ?

Thanks. TjW

Longhorn 70 · 11-13-2013, 07:58 PM

I really haven't heard seals make things "howl". Pinion bearing maybe? Ring and Pinion contact could be? Low on gear oil? I am just guessing.

Actually you can do the seal yourself if you are careful. The way I've done it in the past with a friend was
Remove the drive shaft
Heat the Pinion nut with a torch to expand the nut
Get someone to hold the brakes tight
Big breaker bar and I seem to recall 1 5/16 socket to remove nut This took 2 of us pushing on the bar in the day
Use a puller to remove yoke from pinion shaft
Pull old seal out and tap in new
Install old pinion yoke and NEW nut
Torque to spec. Do not overtighten.

Best of luck.

terry b · 11-13-2013, 08:04 PM

Is it leaking gear lube from the pinon seal?

swamp rat · 11-13-2013, 08:41 PM

Seals don't howl, its probably improper gear mesh..

**Tom Vogel** · 11-13-2013, 09:39 PM

Your diff may be on its way out.

Longhorn 70 · 11-13-2013, 09:48 PM

Good news. Pull the axles, pull the drive shaft, pull the carrier, put it on the bench or take it to the shop.

terry b · 11-13-2013, 10:02 PM

If your pinon bearings are on the way out the pinon gear will want to climb the ring gear. This adds alot of load to the gear set and makes noise. If the pinon bearings are loose you may see gear lube seeping past the seal. Drain the lube by removing the cover and take a look inside. Look at the ware in the teeth then go online and check the pattern and see whats up. If you unhook the drive shaft you can twist the yoke and check back lash. At least how much **** is floating around in there and you can go thicker lube to get by for a short time.

Keith Seymore · 11-14-2013, 08:49 AM

Here at Truck Engineering we have a saying...

"...a 'singing' axle is a happy axle..."

(lol)

Seals don't make an axle howl. As mentioned, improper gear mesh/low oil/failing axle are the usual culprits.

K

11-13-2013, 06:04 PM	#1
3tooln Registered User Join Date: Oct 2010 Location: Monmouth New Jersey Posts: 1	Howling rear when acelerating Hi. I have a Eaton rear in my 72 Suburban that is howling when I acelerate. Im told its the pinion seal. Anyone know what kind of cost I am looking at to get this correct ? Thanks. TjW

11-13-2013, 07:58 PM	#2
Longhorn 70 Registered User Join Date: Dec 2012 Location: Chandler AZ Posts: 1,149	Re: Howling rear when acelerating I really haven't heard seals make things "howl". Pinion bearing maybe? Ring and Pinion contact could be? Low on gear oil? I am just guessing. Actually you can do the seal yourself if you are careful. The way I've done it in the past with a friend was Remove the drive shaft Heat the Pinion nut with a torch to expand the nut Get someone to hold the brakes tight Big breaker bar and I seem to recall 1 5/16 socket to remove nut This took 2 of us pushing on the bar in the day Use a puller to remove yoke from pinion shaft Pull old seal out and tap in new Install old pinion yoke and NEW nut Torque to spec. Do not overtighten. Best of luck. __________________ 1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 Last edited by Longhorn 70; 11-13-2013 at 08:04 PM.

11-13-2013, 08:04 PM	#3
terry b Registered User Join Date: Oct 2011 Location: jackson michigan Posts: 755	Re: Howling rear when acelerating Is it leaking gear lube from the pinon seal?

11-13-2013, 08:41 PM	#4
swamp rat Registered User Join Date: Oct 2007 Location: Spanaway Posts: 8,451	Re: Howling rear when acelerating Seals don't howl, its probably improper gear mesh.. __________________ Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's

11-13-2013, 09:39 PM	#5
Tom Vogel 2WD Jimmy Join Date: Mar 2005 Location: Davis County, Utah Posts: 2,565	Re: Howling rear when acelerating Your diff may be on its way out.

11-13-2013, 09:48 PM	#6
Longhorn 70 Registered User Join Date: Dec 2012 Location: Chandler AZ Posts: 1,149	Re: Howling rear when acelerating Good news. Pull the axles, pull the drive shaft, pull the carrier, put it on the bench or take it to the shop. __________________ 1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9

11-13-2013, 10:02 PM	#7
terry b Registered User Join Date: Oct 2011 Location: jackson michigan Posts: 755	Re: Howling rear when acelerating If your pinon bearings are on the way out the pinon gear will want to climb the ring gear. This adds alot of load to the gear set and makes noise. If the pinon bearings are loose you may see gear lube seeping past the seal. Drain the lube by removing the cover and take a look inside. Look at the ware in the teeth then go online and check the pattern and see whats up. If you unhook the drive shaft you can twist the yoke and check back lash. At least how much **** is floating around in there and you can go thicker lube to get by for a short time.

11-14-2013, 08:49 AM	#8
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,226	Re: Howling rear when acelerating Here at Truck Engineering we have a saying... "...a 'singing' axle is a happy axle..." (lol) Seals don't make an axle howl. As mentioned, improper gear mesh/low oil/failing axle are the usual culprits. K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/



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