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LMC Truck



Username Post: Rear bearing seal leak - Need Help!!        (Topic#279414)
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
04-09-12 11:44 AM - Post#2213127    

My rear passenger bearing seal has apparently worn out to a point where all my gear oil is leaking out. I've refilled the differential with new gear oil to satisfy the losses, but that just leads to more oil covering my brakes.

I stopped by an auto shop the other day to talk about it and they said I had to replace the bearing seal along with the inner axle seal which is between the differential and axle. I also need to replace the bearings which are damaged.

My question is do I really need to replace the inner axle seal too? I thought the gear oil was supposed to run down the axle to the bearings where it was kept in by the bearing seal.

Also do I need to lift the whole truck in order to do this repair? I was thinking that there could be a problem with raising just one side of the truck because I have to get into the differential and having all the pressure on one side of the truck could create problems.

I plan on just replacing the bearing seal as a temporary solution because I do not want my brake pads getting too damaged and need to stop the leak. I'm at the end of my semester at school and need to focus more on that, therefore I will do the other repairs after my semester ends.

Although not replacing my bearings could lead to another seal being damaged, I'm currently in need of a temporary solution.

I drive a 2004 Chevy Silverado 2500HD Crew-cab non-diesel

Any help is appreciated!!

Thanks

Herm



 
LMC Trucks
wagonman100 
Super Senior Member
Posts: 13673
wagonman100
Loc: Baltimore, MD
Reg: 11-27-04
04-09-12 05:50 PM - Post#2213263    
    In response to HermSC

I could be wrong, but I don't know of any inner seal. The oil is supposed to be in the axle tube, that is why the outer seal is there. You will need to remove the cover and the pin that holds the axles out and then push the axle in to remove the c-clip and pull the axle. You are fine just lifting that wheel and replacing just that seal.

Jay
Some days it's not worth chewing through the restraints.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon


 
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
04-10-12 11:14 AM - Post#2213532    
    In response to wagonman100

Ahh I see, I did a little bit more research and found that the inner axle seal usually has to be replaced in the front and that if the inner seal in the back was leaking, I would see oil leaking near my differential. I think maybe the mechanic I was talking to didnt understand or wanted me to pay more $$

Also, If I lift the truck on one side, wouldn't removing the cross pin in the differential force the axle on the side it is sitting on to push inward?

Thanks Again!




 
JaVeRo 
Member
Posts: 332

Loc: East Texas
Reg: 02-02-06
04-10-12 12:27 PM - Post#2213566    
    In response to HermSC

This being a 2500 (3/4 ton) you should specify if your has the 9.5 c-clip axle or the full floating 10.5 axle. Don't just assume yours is the 9.5 unless you know the difference.

James

2003 S10 Blazer 4wd (wife's)
2001 S10 Crew Cab (wife's mail truck)
1996 K1500 (mine)
1979 GMC 3/4 ton 2wd 4spd with a "Gilley's" bumper sticker, my first brand new truck.
2006 K1500 Company Truck
2006 K2500 NV4500 4.10's


Edited by JaVeRo on 04-10-12 12:30 PM. Reason for edit: No reason given.

 
wagonman100 
Super Senior Member
Posts: 13673
wagonman100
Loc: Baltimore, MD
Reg: 11-27-04
04-11-12 04:45 AM - Post#2213822    
    In response to JaVeRo

If you have the c-clip style, that is exactly what you want to happen. The axle has to move inward to remove the c-clip to make it so you can pull the axle out of the housing. If it doesn't move in on it's own, you have to push it in.

Jay
Some days it's not worth chewing through the restraints.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon


 
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
04-11-12 08:17 AM - Post#2213870    
    In response to JaVeRo

It's looking like a 10.5 floater comparing it to
http://coloradok5.com/techpics/gmcorp14bolt 10.jpg

What does this change?





 
JaVeRo 
Member
Posts: 332

Loc: East Texas
Reg: 02-02-06
04-11-12 08:55 AM - Post#2213883    
    In response to HermSC

It changes quite a bit. You don't have to take the cover off the differential or pull the c-clip. You can actually pull the axle out without even jacking it up. You will have to jack it up to take the hub off. There should be a seal where the axle bolts to the hub, a ring of 8 bolts on the end of the axle, and another seal inside the hub that seals to the axle housing.

That may be what your mechanic was referring to as the inner seal.

I have never done it so I will leave the proper instructions to someone else.

James

2003 S10 Blazer 4wd (wife's)
2001 S10 Crew Cab (wife's mail truck)
1996 K1500 (mine)
1979 GMC 3/4 ton 2wd 4spd with a "Gilley's" bumper sticker, my first brand new truck.
2006 K1500 Company Truck
2006 K2500 NV4500 4.10's


 
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
04-11-12 11:29 AM - Post#2213927    
    In response to JaVeRo

Something like this?

http://www.tpdiesel.com/page/402746186



 
JaVeRo 
Member
Posts: 332

Loc: East Texas
Reg: 02-02-06
04-11-12 09:02 PM - Post#2214140    
    In response to HermSC

WOW, they did a great job of documenting the whole procedure.

Keep in mind that the duramax shown usually has a 11.5 AAM axle. The procedure should be the same but some of the info, torque, seal part no. ect. may or may not be different.

James

2003 S10 Blazer 4wd (wife's)
2001 S10 Crew Cab (wife's mail truck)
1996 K1500 (mine)
1979 GMC 3/4 ton 2wd 4spd with a "Gilley's" bumper sticker, my first brand new truck.
2006 K1500 Company Truck
2006 K2500 NV4500 4.10's


 
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
04-13-12 07:58 AM - Post#2214619    
    In response to JaVeRo

Excellent! Thanks for the help! I will update here on how the repairs went later



 
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
05-04-12 03:37 PM - Post#2222464    
    In response to HermSC

Finally finished the job after being out of school for only 2 days! It was much easier than I thought and the procedure I posted above was pretty much exactly what I had to do! The only problem was getting the hub off which required some elbow grease but other than that it was all good.

Thanks for all the help I really appreciate it!!

Also, Happy Cinco De Mayo!!



 
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
04-25-16 08:16 AM - Post#2624169    
    In response to HermSC

This problem has sprung up again. Also, looking at old service records for my truck, it happened after 30k miles on the truck.

What would cause this problem to keep happening? Manufacturing defect?




 
2plus2 
Member
Posts: 761
2plus2
Loc: Langley,BC
Reg: 02-03-05
04-25-16 09:51 PM - Post#2624345    
    In response to HermSC

Did you replace the wheel bearings?
How worn was the surface the seal rides on?

69 Canadian Pontiac 2+2
factory L48 350 Chev,TH350,PW,PT
99 Silverado RCLB 4.8 NV4500 14BSF 4.10's locker 6" Procomp 35 bfg m/t's 9k winch cutout flares
92 S10,bead locked 38 tsl's,d44,9inch,spools,sm 465/np208/np241,exo cage


 
Smitty_Chevy 
Frequent Contributor
Posts: 1034
Smitty_Chevy
Age: 66
Loc: Hampton, GA
Reg: 10-29-08
05-21-16 02:56 PM - Post#2629705    
    In response to 2plus2

Well...what caused the problem? Did you get it fixed??

I wish people would come back and report on the fix on these type of issues.

The tree of liberty must be refreshed from time to time by the blood of patriots and tyrants - Thomas Jefferson


 
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
05-21-16 03:20 PM - Post#2629709    
    In response to 2plus2

Yea the last time I replaced the seal I inspected the axle and bearings. Both looked good, so I'm not sure why this has happened. This has happened around 5 times after I fix the seal.



Edited by HermSC on 05-21-16 03:21 PM. Reason for edit: No reason given.

 
HermSC 
Forum Newbie
Posts: 18

Age: 25
Reg: 04-09-12
05-21-16 03:23 PM - Post#2629710    
    In response to Smitty_Chevy

I'm still trying to figure out the cause.



 
Smitty_Chevy 
Frequent Contributor
Posts: 1034
Smitty_Chevy
Age: 66
Loc: Hampton, GA
Reg: 10-29-08
05-21-16 03:58 PM - Post#2629715    
    In response to HermSC

Thanks for the reply.

The tree of liberty must be refreshed from time to time by the blood of patriots and tyrants - Thomas Jefferson


 
LMC Trucks
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