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Thread: Rear Axle Seals

  1. #1
    Join Date
    Nov 2006
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    Union City, CA
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    Rear Axle Seals

    Well, at 184,000 miles I noticed a puddle behind my driver side rear wheel. My first thought is the rear axle seals. Used to have them replaced constantly on my 88 Crown Vic. Am I only the right track?
    2003 Mercury Marauder 300B (Daily Driver)
    1988 LTD Crown Victoria S

  2. #2
    Join Date
    Apr 2010
    Location
    South Florida
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    30
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    1,613
    Yes. Replace bearings and seals, inspect axle it could be worn out. Have fun!


    Sent from my iPhone using Tapatalk Pro

  3. #3
    Join Date
    Jan 2018
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    Califon NJ
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    IIRC, there's a kit with both axles, seals and bearings. I believe it was cheaper than the parts individually. I do not have the part # saved.

  4. #4
    Join Date
    Mar 2008
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    Quote Originally Posted by Grimrepairman View Post
    IIRC, there's a kit with both axles, seals and bearings. I believe it was cheaper than the parts individually. I do not have the part # saved.
    It even came with friction modifier and gear lube IIRC. Search comes up with this and DANG the price has skyrocketed!!! I paid $295 locally back in like Ď11 if memory serves. Looks like I either have the wrong part number or Ford is REALLY trying to recoup their losses...


    https://www.tascaparts.com/oem-parts...air-3w1z4a109a


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    Cobra short block / ProCharger F1-A / Cog drive upgrade / Manley valves / Brian Tooley Racing valve springs / 80# inj. / -8 fuel line / -6 return / Aeromotive 340 pumps and regulator / 2012 GT500 TR6060 six speed / twin disc clutch / Driveshaft Shop GT500 upgraded CV joint shaft / BA5000 blow thru MAF/ 4.10's / Ford Racing 31 spline set up and Girdle / Metco D.S. safety loop / Stainless Works headers, cats, and everything else out back / ClassGlass hood / Bob's hood strut mod / Hurst line lock / Metco control arms / Addco front and rear sway bars / Monroe severe duty shocks all around / Race concepts rotors / Badgeless grille / 35% tint / FBM's interior LED kit and ambient lighting kit / Pioneer FB700 deck / kenwood speaker 4 Ch. / Rockford Fosgate 10" sub and amp / Kicker 6 X 8's all around / back up cam / bluetooth / Pioneer Xm / 704 RWHP 603 RWTQ tuned by Mo's Speedshop.

  5. #5
    Join Date
    Oct 2003
    Location
    Beaufort, SC
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    Every year they sit they have to tack on $50.00 inventory cost.........about $500.00 so far maybe??

    I bought mine from a Ford dealer in Charleston that stocked about 50 kits for Cop cars......it was like $229.00 or so......back in the day!!
    No Marauder

  6. #6
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    Nov 2017
    Location
    Blue Springs Missouri
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    I believe itís a good idea to swap to 31 spline axles when replacing the axles for bearing/axle wear because the 28 spline axles were known to be not hardened incorrectly. With the 31 spline upgrade youíll most likely not have issues for a long long time if ever again. It is usually warn bearing surfaces on the axle that take out the seals.

  7. #7
    Join Date
    Sep 2013
    Location
    ST Louis
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    Sorry for the derailment but are there any known reports of failed 31 spline axles?

    Sent from my SM-G950U using Tapatalk

    Build# 1979/3214
    Year 2004
    300B
    Ext. DTR
    Int. Dark Char
    FINALLY BOOSTED!!!

  8. #8
    Join Date
    Nov 2017
    Location
    Blue Springs Missouri
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    I’m sure some can be found but it is well documented the issues with the improper hardening of the 28 spline that lead to their failures, of which proof is highlighted over and over on this website alone.

  9. #9
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    Quote Originally Posted by cer0413 View Post
    Sorry for the derailment but are there any known reports of failed 31 spline axles?

    Sent from my SM-G950U using Tapatalk
    As far as I know first hand Moser had a bad run over a decade ago. The heating process near the ABS ring caused brittleness and flanges literally snapped clean off the shaft on high HP cars. I witnessed Zackís prozack black car self destruct at the track. It was a real joy to back it up off the track with like six of us and a floor jack.. A few other reports around the webs came in shortly after of similar situations.


    Sent from my iPhone using Tapatalk Pro


    Cobra short block / ProCharger F1-A / Cog drive upgrade / Manley valves / Brian Tooley Racing valve springs / 80# inj. / -8 fuel line / -6 return / Aeromotive 340 pumps and regulator / 2012 GT500 TR6060 six speed / twin disc clutch / Driveshaft Shop GT500 upgraded CV joint shaft / BA5000 blow thru MAF/ 4.10's / Ford Racing 31 spline set up and Girdle / Metco D.S. safety loop / Stainless Works headers, cats, and everything else out back / ClassGlass hood / Bob's hood strut mod / Hurst line lock / Metco control arms / Addco front and rear sway bars / Monroe severe duty shocks all around / Race concepts rotors / Badgeless grille / 35% tint / FBM's interior LED kit and ambient lighting kit / Pioneer FB700 deck / kenwood speaker 4 Ch. / Rockford Fosgate 10" sub and amp / Kicker 6 X 8's all around / back up cam / bluetooth / Pioneer Xm / 704 RWHP 603 RWTQ tuned by Mo's Speedshop.

  10. #10
    Join Date
    Oct 2004
    Location
    Cape Cod, MA
    Age
    63
    Posts
    2,479
    Not all 2003s have bad axles not sure of cut off dates. Maybe someone who knows can chime in.
    2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
    2003 marauder black 28,000 miles all stock. Garage Queen.
    2004 marauder red daily driver.

  11. #11
    Join Date
    Jun 2003
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    Timbuk3, MI
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    2,289
    burt ragio - Not all 2003s have bad axles not sure of cut off dates. Maybe someone who knows can chime in.
    Associated TSB .....

  12. #12
    Join Date
    Oct 2003
    Location
    Beaufort, SC
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    My 2004 SB car built in November 2003 had bad axles that showed up at 150K miles or so.......I believe ALL of 'em were inferior by design!!
    No Marauder

  13. #13
    Join Date
    Nov 2017
    Location
    Blue Springs Missouri
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    My 04 had 1 bad axle this year. Worn groove on the axle where the bearing rides and bearings looked pretty good otherwise.

  14. #14
    Join Date
    Jun 2008
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    Quote Originally Posted by Marauderjack View Post
    My 2004 SB car built in November 2003 had bad axles that showed up at 150K miles or so.......I believe ALL of 'em were inferior by design!!
    And one of those replacement axles was bad when I pulled them to swap 31-spline axles.
    You "feel" the difference because you want to "feel" the difference. Since you just spent money on the upgrade you "have" to feel the difference

    I'm looking to eliminate the double pump process I have to follow right now to get the pedal hard

    2004 300A Procharger #0010 D1SC
    2003 300A Procharger #0017 D1SC (SOLD)

  15. #15
    Join Date
    Oct 2003
    Location
    Beaufort, SC
    Posts
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    Was it the right side one Dave??
    No Marauder

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