Cup Plug, 6L80/6L90 Rear Case 2WD Only (Steel)(1/2"Diameter) (0.18" Tall)(4x4 Does Not Use These, If 4x4 Is Used In A 2WD, These Must Be Installed) COMES 10 TO CARTON - DO NOT BREAK - SALE BY CARTON ONLY

Cup Plug, 6L80/6L90 Rear Case 2WD Only (Steel)(1/2"Diameter) (0.38"Tall)(4x4 Does Not Use These, If 4x4 Is Used In A 2WD, These Must Be Installed) COMES 10 TO CARTON - DO NOT BREAK - SALE BY CARTON ONLY

Stabilizer Tool Kit, 6L80/6L90 Center Support (Includes: Alignment Tool, Drill Guide, Reamer Guide, Drill Bit, Reamer, Stabilizer Tubes and O-Rings) (Modifies 5 Transmissions)

Lock Tab, 6L80 Center Support (2-6/Low/Rev) Housing To Case (Prevents Inner Case Wear Caused By Rotation Force During Clutch Operation)(Transtec)

Cooler Flow Bypass Valve Kit, 6L80/90 2014-Up (Superior) (Also Fits 8L80/90 2016-Up)(Allows Full Time Cooler Flow And Lube To Parts) (Also Fits Allison 2017-19)

Cooler Flow Bypass Delete Kit, 6L80/6L90 2014-Up (Also Fits 8L90 2016-Up and Allison 2017-19)(Transgo)(Includes: Cooler By-Pass, Oring For Cooler By-Pass, Replacement Pin, Replacement Oring For Thermostatic Assembly)