RAYBESTOS 8L90 Performance Transmission Rebuild Kit & Billet Input Shaft - Level 3 (Drop-In Clutch Module, No Added Clutch Capacity)
FREE UPS Ground to the contiguous United States (lower 48)
In stock items ship within 1-2 business days.
Picture for representation purposes only. Actual contents may vary as we continue to develop our products.
Picture for representation purposes only - actual contents may vary as we continue to develop our product.
Billet Input Shaft is precision machined from 300M alloy steel & heat treated for additional strength & durability. In order to reduce breaking points, this shaft has an increased radius between the sealing rings. PLEASE NOTE: The shaft we provide is complete with sealing rings installed - it is a Drop-In Part. Therefore, you do NOT need to purchase The Sealing Ring Installer or Ring Sizing Tools.
⚠ Important: Multiple Versions Available
The 8L90 transmission uses different input shaft designs depending on model year, application, and torque converter setup. To ensure you receive the correct part, please confirm the following before ordering:
Model Year & Vehicle – The shaft design can vary between early and late model 8L90 units.
Shaft Style – Determine whether you have the early-style or late-style spline configuration.
Torque Converter Compatibility – Match the shaft to your converter hub size and spline count.
How to Verify:
Check your transmission’s build tag or serial number.
Measure your existing input shaft and count splines.
Text us a clear photo of your input shaft and converter hub to 713-895-7019.
💡 Tip: If you’re unsure, our team is happy to help confirm fitment before you order—avoiding downtime and return shipping delays.
Raybestos Clutch Pack Module - Contains upgraded friction components as well as unique blend of GPZ® High Energy fibers that are designed to withstand high stress, high temperatures and repeated cycling for dramatic improvement in transmission performance and durability. Includes (5) C3 clutches in the event that you have the larger clutch capacity drum.
Raybestos Steel Pack Module - Steels are designed to deliver better shift performance and clutch durability, lower noise and shudder and longer clutch life after rebuild. Includes (5) C3 steels in the event that you have the larger clutch capacity drum.
Overhaul Kit
Hi-Per Blue® Piston for C1 (1-2-7-8-R). Manufactured with upgraded High Performance Blue AEM material for superior thermal and chemical resistance with better fit and performance.
GM Filter
