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Sonnax 4L80E, 4L85-E, TH400, TH425 Extreme Duty Forward Clutch Hub Kit 34322-02K For Sale - New and Used


Sonnax 4L80E, 4L85-E, TH400, TH425 Extreme Duty Forward Clutch Hub Kit 34322-02K
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Sonnax 4L80E, 4L85-E, TH400, TH425 Extreme Duty Forward Clutch Hub Kit 34322-02K:
$143.88

Sonnax 4L80E, 4L85-E, TH400, TH425 Extreme Duty Forward Clutch HubKit 34322-02K4L80-E, 4L85-E, TH400, TH425 Extreme Duty Forward Clutch Hub KitSonnax Part No. 34322-02KNot compatible with '64-'66 TH400 main shafts with major diameter of spline about .980”. To use the Sonnax hubs in these early units a 67’-later main shaft with major diameter of spline about .970” must be used.Sonnax extreme duty forward clutch hub kit 34322-02K is manufactured from forged 4140 steel and features nitrited and case-hardened splines to eliminate spline wear in extreme applications in GM TH400, TH425, 4L80-E and 4L85-E units. Kit includes a bearing between hub and direct clutch housing. The case-hardening at bearing surfaces is removed to make further modifications easier. This forward clutch hub and bearing combination shifts the support of the forward clutch hub from the main shaft to the direct housing and sun gear shaft.Compared to OE or other replacement forward clutch hubs, Sonnax extreme duty forward clutch hub kit 34322-02K has an additional .025” thickness designed-in to reduce endplay and provide further endplay adjustment options. No machining is required for typical installation.Hub outer spline length is increased by .055" to allow additional clutch with shortened piston. This added length does not interfere with normal piston travel and can be used with any piston without modifications.
  • Eliminates spline wear in extreme power and offroad applications
  • Simple installation adds bearing and reduces unit endplay
  • Easily modified for addition of second TO MAKE AN OFFER?

    We welcome offers and all reasonable offers will be considered. When making an offer please consider product cost, shipping cost, and your location. This is especially important when making offers on smaller value items. We offer free shipping on most of our parts; therefore, if your offer does not even cover the delivery cost, it doesn’t make sense for us to accept it.

    A good rule of thumb is to offer no more than 15-20% less than the listing price.

    Important InformationShippingReturnsCore PolicyImportant InformationShippingReturnsCore Policy

    IMPORTANT PLEASE READ ALL BEFORE PURCHASING

    As a buyer, it is your responsibility to verify that this part is compatible with your application.


    We WILL NOT pay for return shipping for parts ordered in error. If you order the incorrect part and start a return selecting the reason to be anything otherwise, you will be reported to in order to recoup shipping fees.  

    Your order will be shipped within 1 business days (MON-FRI excluding holidays) of receiving payment and you should expect to receive it five to seven days via US Postal Service or UPS Ground Standard Shipping unless another shipping method is chosen.  In addition to UPS Ground, we offer expedited services as well as local pick-up. Please contact us if a quote is needed and we will be happy to work with you.


    Please Note: All packages valued at over $500 WILL require a signature upon delivery. 


    If your package arrives damaged, please do not open it and contact us immediately.  If you install damaged parts they will not be returnable.


    If your package is returned by the carrier due to address errors, you will be responsible for the shipping Customers:

    Please make sure you monitor your package. Any import duty/taxes must be paid by the buyer. If you do not pay in a timely fashion your package will be returned. You will not receive a refund for the returned items until they’re delivered. Shipping fees will not be reimbursed. return policy for unused, uninstalled items. Any product you return must be in the same condition you received it and in the original packaging.


    If you’re having an issue with a used or remanufactured item and it’s been installed, we require the buyer to contact us immediately so we can provide trouble shooting information. Worst case scenario if that fails, exchange only.


    Certain item such as fluids, used items, tools, and one time use items are not eligible for return.  As a buyer, it is your responsibility to verify that this product is compatible with your you ordered the wrong item for your application YOU are responsible for the return shipping. 


    20% Restocking Fee May Apply


    CORE RETURN DIRECTIONS style="text-align: justify;">

    • Cores must returned within 30 days of the original purchase or any claim to warranty will be null/void.
    • Cores must exhibit normal wear and tear conditions.
    • Cores must be drained of internal fluids.
    • Cores should be wrapped in plastic when repacked for shipment. A garbage bag will suffice.
    • Repack your core inside the box the replacement part was received in. It is extremely important that the core be returned inside its original box for identification purposes.
    • Securely tape your package closed.
    • PLEASE mark the outside of your box clearly and in large lettering with the words "CORE RETURN". This helps make sure that your package remains identified within the warehouse as a core.
    • Affix the PRE-PAID return label that was provided in the original shipment.


    Whatever It Takes will not be liable for shipping damage due to being improperly boxed.
    Whatever It Takes will not be liable for fees, such as taxes, duties, customs associated with international shipments, or lost shipments.


    If you have any questions, please contact our internet sales department at [phone removed by ].


    Please note that this core policy only applies to purchases made through an e-commerce platform such as or Amazon.


    A NAME YOU CAN TRUST

    As an industry veteran in the transmission parts supply business, you can buy with confidence.  Our goal is to provide high quality parts, an experienced sales force, and the highest levels of product availability possible.

  • Eliminates spline wear in extreme power and offroad applications
  • Simple installation adds bearing and reduces unit endplay
  • Easily modified for addition of second
    Buy Now



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