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#1 |
Registered User
![]() Join Date: Aug 2007
Location: Sachse, Texas
Posts: 614
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Rear axle leakage!
So I thought that my rear wheel brake cylinders were leaking, turns out that grease is leaking into the brake drums from the axles on both sides. Looking for a good shop in the DFW area to rebuild the rear end and put a posi unit in it. Any suggestions would be great! Also, I thought it was the brakes because my pedal has been slowly going to the floor while sitting at red lights etc..... Master cylinder??
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#2 |
blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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Re: Rear axle leakage!
the pedal dropping has me concerned. pull back the boots on the wheel cylinders to see if fluid is leaking past the cups. should be dry. is the back of master/front of booster wet? (leaking master)
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#3 |
Registered User
![]() Join Date: Aug 2007
Location: Sachse, Texas
Posts: 614
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Re: Rear axle leakage!
did that on the left side, cleaned it up and it does not seem to be the culprit, brake fluid level has not changed either..... no evidence of leak at master...
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#4 |
Registered User
Join Date: Oct 2007
Location: Valley Springs, Ca
Posts: 857
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Re: Rear axle leakage!
are you sure thats not just isnt a bunch of old dirt and grease buildup from previously and the wheel cylinders are not the issue here? would be best to check those out first, I have never heard of grease leaking that far out before and have never seen that much grease in a rear end any how. also could be brake dust and the cylinders fluid found that dust and clinged to it. I wouldn't go through all the troubles of making a shop rebuild something that isnt really the issue unless your for certain.
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#5 | |
Registered User
![]() Join Date: Aug 2007
Location: Sachse, Texas
Posts: 614
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Re: Rear axle leakage!
Quote:
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#6 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,647
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Re: Rear axle leakage!
Braking issues aside -- brakes are always a priority -- if the axle seals are leaking, those are cheap & easy to replace.
Unless you're planning on having a shop install a posi anyway...
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay Last edited by Stocker; 03-13-2010 at 11:57 PM. |
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#7 |
blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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Re: Rear axle leakage!
if a full visual inspection shows no sign of brake fluid leaks the next step is to test the master. I do this by removing the lines and installing plugs right there at the master. bleed them and retest.
a master can have leakage past the rear cup (which is actually at the front of master) and back up into the reservoir. |
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#8 |
Senior Member
![]() Join Date: Jun 2005
Location: atlanta
Posts: 2,314
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Re: Rear axle leakage!
68C15 is right on the brakes. The mastercylinder is by-passing internally and exiting back into the reservoir. The axle seals are leaking, but the seal surface on the axle is probably grooved. A new seal will slow it down, but you may need new axles.
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#9 |
Registered User
Join Date: Jul 2006
Location: Central PA
Posts: 12,201
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Re: Rear axle leakage!
might be a good time to go rear discs if you are going to have the axle rebuilt anyway... you'll get a new MC for that anyway....
do it once and be happy (and safe) forever...
__________________
The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" |
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#10 |
Registered User
![]() Join Date: Jul 2007
Location: SE WY
Posts: 640
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Re: Rear axle leakage!
I would guess that it is a seal. And more than likely the bearing is out too.
__________________
72 chevy 3/4 ton 4X4 |
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#11 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,219
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Re: Rear axle leakage!
Replace the axle seals & clean up the mess. Replace the master cyl. If you can change a rear end you can do these.
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#12 | |
Registered User
![]() Join Date: Aug 2007
Location: Sachse, Texas
Posts: 614
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Re: Rear axle leakage!
Quote:
Been thinking about swapping my open diff gears out for a posi unit myself instead of taking it to a shop. Anyone here done this? What unit, cost etc..... |
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#13 |
Registered User
Join Date: Jul 2006
Location: Central PA
Posts: 12,201
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Re: Rear axle leakage!
lots of options... eaton posi is 300-400... I wouldn't do it myself though...
__________________
The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" |
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