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TG - FJ40 Knuckle Swap Kit - No Birfield - Trunnion Bearing Eliminator - Locking Hub

Limited Stock!
FJ40 Knuckle Swap

NOTE: Kit contents may differ slightly from product images depending on options selected.

Trail-Gear is proud to release a complete knuckle swap kit for the FJ40 front axle. Included in the kit is everything needed to install Trail-Gear's 6 shooter knuckles, 30-Spline Birfields, Highsteer, and Disc Brakes. The only item that the customer needs to source is a steering box compatible with high steer on a FJ40. In order to support all applications drag link tubing and weld in bungs are included so that the customer can build a custom drag link that is best suited to their lift and steering box combination.

This kit comes with all hardware needed and will not leave you having to run to the store in order to get the vehicle back on the road again. Trail-Gear also gives the customers a variety of options to choose from. All Knuckle Studs, Spindle Studs and Hub Studs included are made from Trail-Gear Super metal.


The customer can select the following options

Birfield Kits:

Elocker Gun Drilled Super Set

Regular Gun Drilled Super Set

No Axles

Trunnion Bearings:

Standard Trunnion Bearings

Trunnion Bearing Eliminators

Hub Bodies:

OEM Hub Bodies and Manual Locking Hubs

TG Creeper Flange Hub Bodies and Creeper Flanges

Longfield Studless Hub

Included in the Kit is:

·         Fully Loaded 6 shooter Kit

·         Gun Drilled Birfield kit if desired

·         Choice of hub body (OEM, Drive Flange or Studless hub)

·         Brake rotors, calipers and pads

·         Brake lines

·         Backing plate eliminator

·         Super metal Knuckle studs

·         Super metal hub studs (If necessary)

·         Manual Locking Hub or Drive Flange( if necessary)

·         Trunnion bearings or Trunnion Bearing Eliminators

·         Wheels Studs

·         High Steer kit

·         All other necessary hardware to complete installation



Welding Required, we recommend welding of any components to be done by a certified welder.  Axle seals included in kit will not work on pre-1968 axles.

⚠ WARNING Cancer and Reproductive Harm -

All products carry our 12 Month Limited Warranty. All warranties are limited to the original purchaser and are not transferable to subsequent owners of the product. The warranty period begins on the purchase date. Trail-Gear warrants that it will repair or replace, free of charge, any eligible product which, under normal conditions of use and service, proves to be defective in materials or workmanship. This warranty does not cover any labor costs incurred in diagnosis of defects, removal or reinstallation of a product, nor does it cover any other consequential expenses.

Please read and review our return and warranty requirement document before sending in products.

Warranty Exclusions

Trail-Gear Inc. warranty does not cover, and Trail-Gear Inc. shall not be liable for, any undertaking, representation, or agreements made by dealers or other third parties selling Trail-Gear products, except where such agreements are within the provisions of this Warranty.

Specifically excluded from this warranty are failures caused by lack of maintenance, misuse, negligence, modification, abuse, improper application, crash damage, installation or operation, or failures caused by unauthorized service or use of unauthorized parts.

Additionally excluded from this warranty are parts which are subject to normal wear and tear, such as bushings, fluids, hoses, gaskets, belts, etc. Products not manufactured by Trail-Gear Inc. are excluded from any warranty and shall be handled with the original manufacturer.

All parts used in a competitive racing environment are excluded from this warranty. If, after inspection, a part returned, under any warranty, is deemed to be ineligible for warranty repair or replacement, the part may be repaired or replaced for a discounted cost. Return shipping charges will apply. Any part for which a warranty replacement is sought must be returned to Trail-Gear Inc. before any replacement items can be shipped. All replacement parts shipped before the suspect part has been received and evaluated by Trail-Gear, MUST BE PAID IN FULL. In such a case, after the suspect part has been received and approved for a warranty replacement, the purchase price for the replacement will be refunded.

    To begin your warranty claim:
  • Please contact Trail-Gear Inc. at 559-252-4950 or email [email protected] prior to returning any product under warranty to verify that warranty is still in effect.
  • Products must be shipped back to Trail-Gear Inc. at the expense of the customer.
    Ship all products to:
    5356 E. Pine Avenue
    Fresno, CA 93727.
  • Please place a clearly marked copy of the original invoice inside the package.
  • Please include a short note stating the problem you are experiencing.

If any of the above mentioned policy is not met, the package will be refused or warranty claim denied. By completing the steps above, this will ensure faster processing of your claim so that Trail-Gear can get your product back to you as quickly as possible. All warranties are generally processed within 2-3 business days of Trail-Gear receiving the parts from you. Additional delays may be incurred if product needs additional testing or repairing.

If you are an international customer, please email the warranty department at [email protected] to receive further instruction. International customers may have the option to field destroy an approved warranty to avoid costly return shipping. In this case, any shipping charges for replacement parts will be at the expense of the customer.