USA Standard Ring and Pinion Sets offer a low cost alternative when pricing is important.  The gears sets are plenty strong but tend to run noisier and are not recommended for quiet running vehicles. 

GM 14 bolt FF have a carrier brake for ring and pinions:  1) 4.56 and up.  2) 4.10 and down.  The thick 4.56 and up gear sets use the 4.10 carrier case.   

These gear sets carrier a one year warranty against defects.