9” Center Section Guidelines & Torque Specifications

1 9 Center Section Guidelines & Torque SpecificationsGear Oil Type & Amount SAE 85W-140 gear oil is recommended 9 cases require quarts of gear oilDifferential Friction Modifier Required for clutch-type limited slip differentials One entire bottle ( fl. oz.) is required in addition to the quarts of gear oil. Ford Racing brand additive part # CM-19546-A1 is recommended. Additive is required even if gear oil manufacturer states oil is compatible with limited slip differentials. Break-in Procedure for Street Gears1. No harsh acceleration!2. Drive vehicle 50 miles3.

2 Allow 1/2 hour for cool down4. Repeat for total of 250 miles5. At 500 miles remove the Center Section , fully clean, use a fresh gasket & reinstallStorage of Center SectionsDifferential bearings, pinion bearings, and ring and pinion should be liberally oiled with gear oil and then sealed from the atmosphere in a plastic bag. Tail Bearing Retainer Plate (shown below) Only Ultra & PRO HD CasesLoad Bolt Set-up & Adjustment1. Tighten load bolt while turning assembly by hand until drag is Loosen load bolt approx..001 from contacting the ring Rotate assembly again.

3 If drag is felt, loosen load bolt an additional . If no drag is felt, hold load bolt in place and tighten the jam nut4. Load bolt may need readjustment after every 4-8 passes depending on frequency of runs. Item #Part #DescriptionTorque X 1/2 FHSCSHand-tightBlue Loctite2F12823/8-24 Nut35 ft-lbsnone3L7010AB9/16-18 12 Point Nut80 ft-lbsAnti-seize 4N1950C3/8-24 x ARP 12 Pt. Screw35 ft-lbsnone5aN1922A28 Spline Pinion Nut200 ft-lbsRed Loctite5bN1922B35 Spline Pinion Nut250 ft-lbsRed Loctite6N1912U7/8-14 Plug40 ft-lbsnone7N1910 Load Bolt Assembly (optional)see notes belownone8aN1975A7/16-20 ARP 12 Pt.

4 Screw85 ft-lbsRed Loctite8bN1976A1/2-20 ARP 12 Pt. Screw120 ft-lbsRed Loctite9aN1905B5/16-18 x BHSCS10 ft-lbsnone9bN1902D5/16-18 x BHSCS10 ft-lbsnone10N2300E7/16-14 x ARP 12 Pt. Screw50 ft-lbsAnti-seize11aN19657/16-20 x 7/8 HHCS 85 ft-lbsRed Loctite11bN19641/2-20 x 7/8 HHCS105 ft-lbsRed Loctite11cN19677/16-20 x 1 HHCS70 ft-lbsRed Loctite11dN19687/16-20 x 1-1/4 HHCS70 ft-lbsRed Loctite12B1757B3/8-16 x HHCS35 ft-lbsnone13L4000J3/8 NPT Socket Pipe Plug40 ft-lbsThread Sealer14H1122D1/2-20 x 3 SHCS80 ft-lbsAnti-seize15B1320R3/8-16 x HHCS35 ft-lbsnone16N1908E1/2 NPT Socket Pipe Plug40 ft-lbsThread SealerPg.

5 1 of 2 Rev: 5/2/2016 Center Section Removal Use provided jackscrews (18) to aid in remvoal of the Center from the rear end. (only Ultra & Pro HD) Do not leave the jackscrew installed during operationUltra CasePRO HD CasePRO CaseSTREET CasePg. 2 of 2