HomeHome  PortalPortal  GalleryGallery  SearchSearch  RegisterRegister  Log in  

Share
 

 Rear Axle Bearings/Seals

Go down 
AuthorMessage
bocoogto



Posts : 86
Join date : 2012-10-07
Age : 77
Location : Winneconne, Wisconsin

Rear Axle Bearings/Seals Empty
PostSubject: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSun Jan 17, 2016 11:20 am

I'm about to replace the rear axle bearings on my '95 RMW. The right side is noisy and loose, which is why I have ordered a replacement axle along with the bearings.

The factory put bearings on the rear axles with a seal outboard of the bearing. I thought the bearings were lubricated from the fluid in the rear-end. But, some replacement bearings have the seal inboard of the bearing, which would keep rear-end lube from reaching the rollers. It would also allow water/dirt/brake dust to enter the bearing roller area and contaminate it.

Am I wrong about this? Are the factory bearings lubed with grease and rely on that only for lubrication?
Back to top Go down
BigBlackBeaSSt

BigBlackBeaSSt

Posts : 4551
Join date : 2009-08-01
Age : 54
Location : Lewisberry, PA

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSun Jan 17, 2016 11:36 am

The factory bearing rely on the rear fluid for lube.  Bearing savers might work instead of replacing your axles.  I had good luck with them on my Impala ss.
Back to top Go down
Sprocket

Sprocket

Posts : 5629
Join date : 2008-11-04
Location : Palm Beach County

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSun Jan 17, 2016 8:40 pm

on the flip side, I had bearing savers leak, and went back to OE on a lightly scored axle with NO ISSUES. Did that on three wagons too.
Back to top Go down
bocoogto



Posts : 86
Join date : 2012-10-07
Age : 77
Location : Winneconne, Wisconsin

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeMon Jan 18, 2016 11:59 am

Thanks for the responses. I thought lubrication was from the rear-end lube. Surprising the grease on the bearing saver type would last in that environment. Do you still put on the outside seal when using the bearing savers?

I have not yet torn it down, but know the right rear is noisy and you can wiggle the wheel indicating wear in the bearing area. The other side is quiet and tight.

I ordered one Dorman axle and have two Delco OEM bearings and seals. If my slide hammer works to remove the old bearings, it should be a fairly easy job. I anticipate crap in the axle tube on the bad side and I'll clean that out before re-assembly.

I had put synthetic lube in the rear-end last summer, thinking the noise may have been from the pumpkin, but, luckily, it's the axle bearing. Will put synthetic in again.

The Valvoline synthetic is sold as 75W-90 or 75W-90 for limited slip rears. Mine is limited slip. Is it really necessary to use the additive with the fluid made for LS rears?
Back to top Go down
MalibuSSwagon



Posts : 580
Join date : 2014-01-12
Location : NH

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeMon Jan 18, 2016 1:01 pm

I asked a friend who is a GM Master tech about axle saver bearings, he told me not to waste my time as they will leak. I figure new axles, bearings, seals and all when I regear the 8.5 on my truck just so I don't have to do it over.
Back to top Go down
bocoogto



Posts : 86
Join date : 2012-10-07
Age : 77
Location : Winneconne, Wisconsin

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeTue Jan 19, 2016 12:41 pm

How about the LS additive? Is it necessary with the Synthetic specified for LS rear-ends?
Back to top Go down
brokecello
Moderator
brokecello

Posts : 3447
Join date : 2009-05-28
Age : 41
Location : Greenville, SC

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeTue Jan 19, 2016 2:21 pm


I've used those axle savers fine...but obviously going new axle and oe bearings is always better.

I use two bottle of LS additive ALWAYS. Used to get the little GM bottles, but now I just use the Trans X (little blue squeeze bottle) from the parts store. If the gear oil says "LS additive"...thats great, but still use the other bottle additive. You really need that or you will hear it once that rear heats up.
Back to top Go down
http://www.ChrisPowellmusic.com
bocoogto



Posts : 86
Join date : 2012-10-07
Age : 77
Location : Winneconne, Wisconsin

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeWed Jan 20, 2016 11:37 pm

Tore it down today, put in the new bearings, seals, and replaced one axle that showed wear on the bearing surface. Dorman axle is $102 with free shipping (Prime) from Amazon. It comes with wheel studs, bearing, and seal.

Removing the seals is not hard, but pulling the bearings with a slide hammer is not easy. I have a fairly hefty slide hammer, but was really tired by the time the bearings were out.

I used Valvoline Synthetic 75W-90 for Limited Slip differentials with no LS additive. Used exactly two bottles. Will report on whether there is any chatter. If there is, I'll add the Trans X product.


Last edited by bocoogto on Thu Jan 21, 2016 11:50 am; edited 1 time in total
Back to top Go down
bocoogto



Posts : 86
Join date : 2012-10-07
Age : 77
Location : Winneconne, Wisconsin

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeThu Jan 21, 2016 11:49 am

The wagon is now very quiet on the highway!! No chatter with just the two bottles of 75W-90 Synthetic lube with no additives.

Now, if that rear cover doesn't leak, I'm done. I used black RTV over the old gasket.
Back to top Go down
bocoogto



Posts : 86
Join date : 2012-10-07
Age : 77
Location : Winneconne, Wisconsin

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeMon Jan 25, 2016 11:39 am

brokecello wrote:

I've used those axle savers fine...but obviously going new axle and oe bearings is always better.  

I use two bottle of LS additive ALWAYS. Used to get the little GM bottles, but now I just use the Trans X (little blue squeeze bottle) from the parts store.  If the gear oil says "LS additive"...thats great, but still use the other bottle additive.  You really need that or you will hear it once that rear heats up.  

You were right!! All is OK until the axle warms up after a few miles. Then, especially backing up, there is a lot of "creaking" going on from the posi.

Not to worry, however, I'll add the additive. Still enjoying the quiet ride I hadn't experienced for a long time with the bad right rear bearing.

Back to top Go down
bocoogto



Posts : 86
Join date : 2012-10-07
Age : 77
Location : Winneconne, Wisconsin

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeTue Feb 02, 2016 12:13 pm

I put one 7 oz. tube of TransX in the diff last night. Noise problem is gone!

Thanks.
Back to top Go down
Sprocket

Sprocket

Posts : 5629
Join date : 2008-11-04
Location : Palm Beach County

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeTue Feb 02, 2016 2:49 pm

I have a 10 ft steel pipe I slide through the axle and hit it with a hand sledge on the opposite side and the bearings just fly out of there, lol

Trans X FTW
Back to top Go down
bocoogto



Posts : 86
Join date : 2012-10-07
Age : 77
Location : Winneconne, Wisconsin

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeTue Feb 02, 2016 5:00 pm

I thought of that! A 1/2" black pipe would work fine. By the time I got done pulling on the slide hammer, I wish I'd have had a pipe like you describe!

Sure is nice not having the bearing noise on the highway!
Back to top Go down
IMPALADAKID

IMPALADAKID

Posts : 239
Join date : 2008-11-04
Age : 51
Location : Rochester, NH

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSat Feb 06, 2016 5:32 pm

Quick question. Sorry for the hijack.
I know there are different size differentials for sedans. 7.5, and 8.5. Is this also the case with wagons? I have always been under the impression that only the 8.5 was used in all wagons. I ask because I have to order axle bearings and seals. The pumpkin looks like a 8.5 as it is round, but the code is GM8/2.56. Everything I see on the web says the 2.56 is only in a 7.5 pumpkin.
Back to top Go down
phantom 309

phantom 309

Posts : 5813
Join date : 2008-12-28
Age : 109

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSat Feb 06, 2016 5:42 pm

It;s just an 8.5 10 bolt gm rear end,..
Back to top Go down
IMPALADAKID

IMPALADAKID

Posts : 239
Join date : 2008-11-04
Age : 51
Location : Rochester, NH

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSat Feb 06, 2016 6:56 pm

phantom 309 wrote:
It;s just an 8.5 10 bolt gm rear end,..
That is what I figured. Thanks Nick.
Back to top Go down
jayoldschool

jayoldschool

Posts : 2568
Join date : 2009-06-14

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSat Feb 06, 2016 8:21 pm

Aren't the wagon bearings bigger than the sedan 8.5s?
Back to top Go down
IMPALADAKID

IMPALADAKID

Posts : 239
Join date : 2008-11-04
Age : 51
Location : Rochester, NH

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSun Feb 07, 2016 8:33 am

jayoldschool wrote:
Aren't the wagon bearings bigger than the sedan 8.5s?
I am not sure. Rock auto list with 11" brakes, or 9.5" brakes. So now it is about brake size. Others say sedan or wagon. I would assume that all wagons have the bigger brakes?
I guess if you had a tow package, or B4U sedan you would really have to watch out what you get.
Back to top Go down
Fred Kiehl

Fred Kiehl

Posts : 5352
Join date : 2009-11-13
Age : 71
Location : Largo, FL 33774

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSun Feb 07, 2016 9:08 am

You can check Rock Auto for part numbers of wagons vs. sedans. If they are different, the bearings are probably larger. The wagon axles are an inch longer than the sedan axles.
Back to top Go down
jayoldschool

jayoldschool

Posts : 2568
Join date : 2009-06-14

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSun Feb 07, 2016 10:01 am

All wagons have the bigger brakes.
Back to top Go down
IMPALADAKID

IMPALADAKID

Posts : 239
Join date : 2008-11-04
Age : 51
Location : Rochester, NH

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeSun Feb 07, 2016 10:38 am

jayoldschool wrote:
All wagons have the bigger brakes.
Thank you. This is the first time I have owned a wagon with 2.56 gears so while I was 95% sure all wagons used the 8.5, and 75% sure all wagons used the bigger brakes, you and Nick confirmed it. So now I feel confident in getting what I need.
Thanks. And I am sorry to the original poster for hijacking his thread. I just figured since my questions were related there was no sense starting a new thread.
Back to top Go down
Dutch Pete

Dutch Pete

Posts : 421
Join date : 2009-12-07
Age : 59
Location : Netherlands

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeMon Feb 08, 2016 2:30 pm

@Bocoogto: rear cover not leaking?
Back to top Go down
BigBlackBeaSSt

BigBlackBeaSSt

Posts : 4551
Join date : 2009-08-01
Age : 54
Location : Lewisberry, PA

Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitimeFri Feb 12, 2016 11:24 am

jayoldschool wrote:
Aren't the wagon bearings bigger than the sedan 8.5s?

Yes
Back to top Go down
Sponsored content




Rear Axle Bearings/Seals Empty
PostSubject: Re: Rear Axle Bearings/Seals   Rear Axle Bearings/Seals Icon_minitime

Back to top Go down
 
Rear Axle Bearings/Seals
Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
GM Longroof Forum :: Longroof Tech :: Drivetrain and Towing-
Jump to: