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  1. #1
    LTXTech Sponsor


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    Offline
    Join Date
    Jan 2013
    Name
    Gail C. Cahall
    Vehicle
    93 Camaro, 95 Impala SS, 01 Corvette, '05 Dodge Ram
    Location
    Newark, Delaware
    Posts
    619

    Default An education about "13 vane" 4L60E pumps

    I'm sure many of you have seen the term "13 vane pump" used in some build advertising. What most people aren't aware of is that this is nothing more than a selling gimmich. Earlier 4L60Es came with 10 vane pumps. It's common practice to install a 13 vane rotor, guide, and 3 extra vanes in a 10 vane pump, and call it a "13 vane pump". The problem with this is, it serves no advantage, as a matter of fact, a 13 vane rotor is weaker than a 10 vane rotor. A REAL 13 vane pump will be cast with "13V" on both the body side and stator side of the pump. A real 13 vane pump has longer feed slots in the stator support (cover), and longer feed slots on the pump slide. Just swapping the rotor, guide, and vanes make no difference on overall pressure or pressure stability.
    To add to that, when a rotor breaks, it breaks at the vane slots. Adding 3 more vane slots adds 3 more potential failure areas. We have seen a much higher rotor failure rate in 13 vane rotors than 10 vane rotors.
    So, why do so many companies use them? Well, they cost the same as a 10 vane rotor, and it looks good on paper...LOL

    Frank
    Gail C. Cahall
    CAHALL PERFORMANCE TRANSMISSIONS

  2. #2
    The Wrench


    Status
    Offline
    Join Date
    May 2009
    Name
    Chile
    Vehicle
    1994 9C1 6SPD
    Location
    South Jersey
    Posts
    1,942

    Default

    Made this a stickie. Very good info Frank. A good way to educate our fellow members.
    ASE L1 Master Certified Tech's 9C1 T56. Yeah she's got a big butt. But watch her move it.

    R.I.P. Z8

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