Caterpillar 943LGP

Parts machine ( Transmission bad) everything else appears to be OK.943 LGP s/n 4Z0558 a/n 8G61393204 s/n 45V47784 a/n 1W7263Trans 1DA02449 a/n 18" D g pads Idler 7/8 worn book shows approx 75% wornSALT Rails Depth Ga 3 .75 Going by cat Book they show no wear ,but these are not CAT rails.Bushings not turned 2 5/8 depth ga / 2 1/8 caliper.Carrier Rollers 5 5/8 worn book says 80% worn.Track Rollers measure from 7 3/4 to 7 9/16 50 to 65 % worn.