The Monster like Beast 4L60E 4L65E 700R4 Transmission Sunshell Sun gear reaction

Modified Item: NoCustom Bundle: NoInterchange Part Number: 77749Surface Finish: metalManufacturer Part Number: 42269OE Spec or Performance/Custom: Performance/CustomOther Part Number: 77749HDBBrand: GFXFitment Type: Performance/CustomNon-Domestic Product: NoDrive Type: 4WD,AWD,RWDManufacturer Warranty: Yes4L60E 4L65E 700R4 The Monster Sun Gear Shell   Smart heavy duty upgrade for the 700R4 4L60E 4L65E transmissionFits all units 1982-upThe original equipment sun gear shell is notoriously weak in the splined area.Especially with 1996-on units, the originals are even less hardened!Pre-'96, GM engines were TBI and idled at higher RPM after cold start and needed more hardnessto survive stripping (at least through the factory warranty period).The "Monster" is very strong in comparison.  The splined area is considerably thicker,to help resist twisting common with the thin stock type.Please see comparison pic in the gallery!