The steels carry the clamping load of the entire pack, so once they lose thickness the pressure never reaches the friction surface evenly.6L80E Steel Clutch Pack. Each plate is flat, parallel and to specification thickness, which is the whole requirement for a steel.A pack built with mixed thicknesses applies unevenly no matter how the pressure reads. Shipping weight is 7.9 lb.The parts list below is exactly what ships. Compare it against your teardown before ordering.REMCO has supplied automatic transmission parts since 1991, and every order ships with its part listing so the receiving technician can check what arrived against what was ordered. Steel Clutch Plate Module for 6L80E - replacement component designed for proper fit and function Designed to support proper heat transfer, clutch and plate stack height during clutch pack service Package Includes: one steel clutch plate module as described, supplied loose for clutch pack service Hardened steel plates matched to the stock stack thickness - designed for dependable service in the intended application. Ships at 7.90 lb, 18x10x2 in Intended for builders replacing scored or heat damaged plates. Deburr the drum splines, stack alternating with the frictions and set to the service manual range What's in the box1 x Steel Clutch Pack, 6L80ECompatible vehiclesFits CTS-V [06-15], Escalade/ESV/EXT [07-15], SRX [06-09], STS [06-11], XLR [06-11], Camaro [10-13], Corvette [06-11], SS [14-17], Avalanche [08-13], Express 2500 [10-11], Express 3500 [10-11], Silverado 1500 1/2 Ton [07-09].