This Monday’s Mod, installing locking spindle nuts on your HMMWV comes from my good Facebook Friend, Rub Muradian of Damage Control Customs.
This article will focus on installing a Locking Spindle Nut, which can be purchased here. At the end of this article, there will be a few bonus items.
Note: This article is not intended to replace your Training Manual / Owner Manual, please use this article to only supplement.
You want to first start with draining the existing gear oil by removing the drain plug using a 5/16 Allen wrench. The drain plug is items number 4 within the first image below. You want to open this plug and allow it to completely drain.
Next you want to remove the steering arm cover, which will expose the existing spindle nut. To do this, you’ll need a 3/4 socket. Within the first image below, item number 5 is the steering arm cover, and items 6 and 7 are referencing the nuts to be removed in this step.
Note: You may have to remove the tie rod end / radius rod end from the steering arm cover. On trucks with CTIS, disconnecting of the arm may be required since it is almost impossible to get the cover back on without folding the lip of the seal.
Next you want to remove all of the old gasket from the steering arm cover and the geared hub. After which you want to dry off any of the old gear oil.
Next you want to bend back (away from the retaining nut) the locking tabs on your existing lock-washer. Then, using a retaining nut wrench / socket you want to remove the retaining nut, lock-washer, and keyed washer.
Next you want to start to install your Locking Spindle Nut. You want to take the notched washer and install that onto your spindle.
Next you want to install your locking retainer and and the snap ring. The locking retainer will have one of 6 position to which it may securely lock onto. To install the snap rings you will need large snap ring pliers. It is critical to make sure your locking retainer and snap ring are in place correctly.
Since you have the geared hubs exposed, you might as well as check your bearing.
Since you have the tire off, you might as well as check to make sure your shafts are seated completely.
Since you have the tire off, you might as well as check all of your joints. In this case we’re going to look at the boll joints. If needed, such as in this case, refill the grease, or maybe consider changing the boll joints.