[Huck]

You may have to put the brass/bronze bushings in the spring eyes also.

Because normaly, if the shackle bolts have no zerk fittings there maybe plastic type bushings in the spring eyes. And they wear out very fast, less than 10,000 miles. Then they get noisier.

I know that if you buy the heavy duty greaseable shackle kit from Dexter they will send you bolts with zerk fittings, extra(1/2")thick spring hangers, brass/bronze spring eye bushings, and equalizers with zerk grease fittings on them. All for less than $150 for tandem axles, last I checked.