Details: CROSS REFERENCE Name Part Number Notes Eaton 818552 Automatic Slack Adjuster Eaton 973530 Automatic Slack Adjuster Haldex 40010121 Automatic Slack Adjuster Haldex 40910649 Automatic Slack Adjuster Haldex 40910733 Automatic Slack Adjuster Meritor R806022 Automatic Slack Adjuster Midland 40010143 Automatic Slack Adjuster Peterbilt 305886 Automatic Slack Adjuster Peterbilt 03-05886 Automatic Slack Adjuster SPECIFICATIONS Attribute Value Slack Type Automatic-Haldex Type (Premium) Spline Count 10 Spline Dia. 1-1/2" Arm Length (L1-L2) 5-1/2"-6-1/2" This item is featured in the following schematics: Name Type Eaton Drive Axle 16-1/2? x 7? FMSI 4311J (Standard 541 Series Single Anchor Pin) Brake Eaton Drive Axle 16-1/2? x 7? FMSI 4708 (?ES? Severe Service, Cast & Fabricated) Brake Eaton Drive Axle 16-1/2? x 7? FMSI 4709 (?ES-I? Extended Service Single Anchor Pin) Brake Eaton Drive Axle 16-1/2? x 7? FMSI 4709 (?ES-II? Extended Service Single Anchor Pin) Brake Eaton Drive Axle 8? x 7? / FMSI 4527 (Self-Contained, HD Cast Shoes) Brake Meritor Drive Axle 16-1/2? x 6? FMSI 4514G (?P? Series Double Anchor Pin) Brake Meritor Drive Axle 16-1/2? x 7? FMSI 4515E (?P? Series Double Anchor Pin) Brake Meritor Drive Axle 16-1/2? x 7? FMSI 4515 (Cast P Brake, Severe Service) Brake Meritor Drive Axle 18? x 7? / FMSI 4471B (P Series Cast) Brake