I am taking the locking hubs out of an 87 10 bolt and putting them in an 83 10 bolt. The 87's splined shaft has 2 grooves in it for a retaining ring. The 83 only has one and it is too far back to use. The 87 only used the outside groove. When I put this in the 83 will it be safe without installing the retaining ring? It looks like it will be OK since the big ring holds it in there. Its just the one on the axle that I will not be able to install. Any input from you pros will put my mind at ease.