Fitment: Limited slip differential is replacement for GM 7.5in 10 Bolt Applicatons with 26 Spline Axles, fit for 3.23 Numerically Higher Gear Ratios (3.23, 3.42, 3.55, 3.73, 4.11, 4.56, etc). Replace OE Part Number: The replace OE number of spline limited slip locker differential is 19663-010. High Quality Material: Grip slip differential is made of high quality steel material, high hardness, rustproof, sturdy and durable. Function: Spline limited slip differential prevents traction loss and optimizes power distribution when needed. Precision Manufacturing: Precision manufacturing ensures stable performance and high reliability, have a long service time. Easy Installation: Easy to install, can directly replace the old or broke one, conveninent for using, save your time and energy. Item Type: Limited Slip Differential Material: Steel. Replacement for all GM 7.5in 10 Bolt Applicatons with 26 Spline Axles Fits for 3.23 Numerically Higher Gear Ratios (3.23, 3.42, 3.55, 3.73, 4.11, 4.56, etc). Please double check the part number of your item, matching information is for reference only. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.