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Thread: Should I put in a CV rear axel?

  1. #1
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    Question Should I put in a CV rear axel?

    I am having problems with the rear end in my car and I was also adviced a few times (espeically by Zack) that I would be better off with a 31 spline axel.

    Does it make since to get a junkyard CV axel, put in my 4:10 gear, install it and call it a day? Do I keep saving for the Detroit True Trac and call it a day and keep my Marauder axel?

    Does the CV axel have any benefit? If I do put in the axel will I still need a new posi? Most axels in yards are from Taxis around here.

    Please post up advice.

    With it's to do something or call me an idiot. I haven't done anything yet, so it's not like I wasted any cash.
    "Bye Bye, Johnny B. Goode."

  2. #2
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    what problems are you having with the rear end?

    My Advice: get *new* 28 spline axles, new bearing kit, seals - the works. Get your track-lok rebuilt or have someone else like Renihart do it for you. He sold me a nice 28 spline tlok with the CF clutches. Use AMSOIL Synth gear oil, get a girdle too. Break it all in with Dino gear oil then go AMSOIL synth 500 later.

    Using Junk yard axles from Taxi cabs is like taking a shower then putting your dirty nasty clothes (same undies for 4 weeks?) back on.
    2021 F150 XLT Super Crew short bed - no chrome! - 3.5 Ecoboost 400hp/500tq - 36 Gal tank (600 miles) - 4x4 FX4 Offroad + Max Tow - 3.55 Locker - 10 Speed - Pro Power 2kva - 24mpg @ 80 Ford is still the best.
    03 300A - Number 1727
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  3. #3
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    Did i not hear that our rear ends are out of continentals? just a little wider for the better handling??

  4. #4
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    Quote Originally Posted by Brian H View Post
    Did i not hear that our rear ends are out of continentals? just a little wider for the better handling??
    The last continentals were FWD, so I'd hope not.....
    Don't bring skittles to a gunfight.

  5. #5
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    OOOPPPPPSSSSSSSSSSSSSSS....... ............ maybe it was from the mark 8's

  6. #6
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  7. #7
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    Blown 3 rears!!

    I've blown 3 rears - really just blew the posi out. I installed the Cobra HD posi rebuild kit from FRPP which include the HD posi disks and F150 "S" spring and it works very well. I would have a good Mustang shop install them for you. I believe this is a very economical solution to your problem to get you up and running well.

    Glenn
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  8. #8
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    So I should just worry about my posi? No need to replace anything else? Sounds like a better plan.
    "Bye Bye, Johnny B. Goode."

  9. #9
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    Quote Originally Posted by Brian H View Post
    Did i not hear that our rear ends are out of continentals? just a little wider for the better handling??
    They were from Town Car Limos.

  10. #10
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    Quote Originally Posted by Glenn View Post
    I've blown 3 rears - really just blew the posi out. I installed the Cobra HD posi rebuild kit from FRPP which include the HD posi disks and F150 "S" spring and it works very well. I would have a good Mustang shop install them for you. I believe this is a very economical solution to your problem to get you up and running well.

    Glenn
    +1
    This is the route that I am taking with my rear end




    BAIR

  11. #11
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    We should have a FRPP posi vs Tru Trac pros/cons thread, cuz I am currently torn personally


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  12. #12
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    Quote Originally Posted by RR|Suki View Post
    We should have a FRPP posi vs Tru Trac pros/cons thread, cuz I am currently torn personally
    I second that.
    "Bye Bye, Johnny B. Goode."

  13. #13
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    For the last time:
    CV axles and a Cobra Diff, all available from Ray TheDealer.

  14. #14
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    Quote Originally Posted by Brian H View Post
    OOOPPPPPSSSSSSSSSSSSSSS....... ............ maybe it was from the mark 8's
    Nope, they have IRS
    Thanks to Darrin @ BC Automotive:
    $1800 and it was worse than when he started!

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  15. #15
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    Quote Originally Posted by SVT_MERC View Post
    They were from Town Car Limos.

    Ours are a standard 28 spline 8.8 - same as a plain jane crown vic.

    Ford Limos got 31 splines.

    In 2005+ all CV's got 31 splines.
    2021 F150 XLT Super Crew short bed - no chrome! - 3.5 Ecoboost 400hp/500tq - 36 Gal tank (600 miles) - 4x4 FX4 Offroad + Max Tow - 3.55 Locker - 10 Speed - Pro Power 2kva - 24mpg @ 80 Ford is still the best.
    03 300A - Number 1727
    - Super Touring - 10k in the best upgrades - 13.8@99 N/A - SOLD
    - STAP was so much fun, loved meeting you all and racing.



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