Package Include:1*GM 7.5" 28 Spline Limited-Slip Locker2*Carrier Bearings2*Carrier Bearing RacesW/o Product Instruction Part Number:19599-010 GM 7.5" 7.625" 10-Bolt Posi Unit - 28 Spline w/ Carrier Bearings/RacesFits 3.23 & Numerically Higher Gear Ratios (3.23, 3.42, 3.55, 3.73, 4.11, 4.56, etc)Nodular Iron CasingHeavy Duty Composite Clutches, 400lb Springs & Forged 4130 InternalsStable characteristics, high reliability.Aftermarket Products with Premium Quality.Axle Placement: RearAxle Spline :28Cover: 10 BoltGear Ratio: 3.23 And UpModel:GM 7.5" 7.625" Fit For :For all Chevy GM 7.5" 10-Bolt Applicatons w/ 28 Spline AxlesFor 3.23 & Numerically Higher Gear Ratios (3.23, 3.42, 3.55, 3.73, 4.11, 4.56, etc) Features: Package Include: 1*GM 7.5" 28 Spline Limited-Slip Locker 2*Carrier Bearings 2*Carrier Bearing Races W/o Product Instruction Part Number:19599-010 GM 7.5" 7.625" 10-Bolt Posi Unit - 28 Spline w/ Carrier Bearings/Races Fits 3.23 & Numerically Higher Gear Ratios (3.23, 3.42, 3.55, 3.73, 4.11, 4.56, etc) Nodular Iron Casing Heavy Duty Composite Clutches, 400lb Springs & Forged 4130 Internals Stable characteristics, high reliability. Aftermarket Products with Premium Quality. Axle Placement: Rear Axle Spline :28 Cover: 10 Bolt Gear Ratio: 3.23 And Up Model:GM 7.5" 7.625" Fit For :For all Chevy GM 7.5" 10-Bolt Applicatons w/ 28 Spline AxlesFor 3.23 & Numerically Higher Gear Ratios (3.23, 3.42, 3.55, 3.73, 4.11, 4.56, etc) Fit For : For all Chevy GM 7.5" 10-Bolt Applicatons w/ 28 Spline Axles For 3.23 & Numerically Higher Gear Ratios (3.23, 3.42, 3.55, 3.73, 4.11, 4.56, etc) Notes: If You Are Not Sure The Item 100% Fit For Your Vehicle Before Your Purchase. Please Allow 1-3CM Differs Due To Manual Measurement.Due To The Different Display And Different Light, The Picture May Not Reflect The Actual Color Of The Item. Thanks For Your Understanding. 1Axle Splines 28; Items Included (2) Carrier Bearings & (2) Carrier Bearing Races; Part Number TL27551Q; Material Nodular